{"id":6604,"date":"2022-07-25T00:03:48","date_gmt":"2022-07-24T16:03:48","guid":{"rendered":"http:\/\/123.57.164.21\/?p=6604"},"modified":"2022-07-25T12:38:13","modified_gmt":"2022-07-25T04:38:13","slug":"java-%e5%8a%a8%e6%80%81%e4%bb%a3%e7%90%86","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=6604","title":{"rendered":"Java \u52a8\u6001\u4ee3\u7406"},"content":{"rendered":"\n<p><strong>\u4e00\u3001\u6982\u8ff0<\/strong><\/p>\n\n\n\n<p><strong>1\u3001\u4ec0\u4e48\u662f\u4ee3\u7406<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><code>\u4ee3\u7406\u6a21\u5f0f\u662f\u5e38\u89c1\u7684Java\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u7684\u8bbe\u8ba1\u662f\u4ee3\u7406\u7c7b\u548c\u59d4\u6258\u7c7b\u6709\u76f8\u540c\u7684\u63a5\u53e3\uff0c \u4ee3\u7406\u7c7b\u4e3b\u8981\u8d1f\u8d23\u4e3a\u59d4\u6258\u7c7b\u9884\u5904\u7406\u6d88\u606f\u3001\u8fc7\u6ee4\u6d88\u606f\u3001\u628a\u6d88\u606f\u8f6c\u53d1\u7ed9\u59d4\u6258\u7c7b\uff0c\u4ee5\u53ca\u65f6\u5019\u5904\u7406\u6d88\u606f\u3002\u4ee3\u7406\u7c7b\u548c\u59d4\u6258\u7c7b\u4e4b\u95f4\u901a\u5e38\u4f1a\u5b58\u5728\u5173\u8054\u5173\u7cfb\uff0c \u4e00\u4e2a\u4ee3\u7406\u7c7b\u7684\u5bf9\u8c61\u548c\u4e00\u4e2a\u59d4\u6258\u7c7b\u7684\u5bf9\u8c61\u5173\u8054\uff0c \u4ee3\u7406\u7c7b\u7684\u5bf9\u8c61\u672c\u8eab\u5e76\u4e0d\u63d0\u4f9b\u771f\u6b63\u7684\u670d\u52a1\uff0c\u800c\u662f\u901a\u8fc7\u8c03\u7528\u59d4\u6258\u7c7b\u7684\u76f8\u5e94\u65b9\u6cd5\u6765\u63d0\u4f9b\u7279\u5b9a\u7684\u670d\u52a1\u3002<\/code><\/p>\n\n\n\n<p>\u5728\u65e5\u5e38\u751f\u6d3b\u4e2d\uff0c\u4ee3\u7406\u7684\u5e94\u7528\u4e5f\u968f\u5904\u53ef\u89c1\uff0c\u6bd4\u5982\u4e2d\u4ecb\u3001\u4ee3\u7406\u52a0\u76df\u5546\u7b49\uff0c \u672c\u8d28\u4e0a\u90fd\u7b97\u662f\u4e00\u79cd\u4ee3\u7406\u3002 \u4ee5\u4fbf\u5229\u5e97\u4e3a\u4f8b\uff0c\u5b83\u5e76\u4e0d\u76f4\u63a5\u751f\u4ea7\u5546\u54c1\uff0c\u800c\u662f\u5c06\u5404\u4e2a\u5de5\u5382\u751f\u4ea7\u7684\u4ea7\u54c1\u805a\u5408\u5728\u4e00\u8d77\uff0c \u4ee5\u65b9\u4fbf\u6d88\u8d39\u8005\u9009\u62e9\u81ea\u5df1\u9700\u8981\u7684\u4e1c\u897f\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0c \u4fbf\u5229\u5e97\u3001\u5de5\u5382\u3001\u6d88\u8d39\u8005\u4e09\u8005\u4e4b\u95f4\u7684\u5173\u7cfb\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228-1024x664.png\" alt=\"\" class=\"wp-image-6605\" width=\"460\" height=\"297\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228-1024x664.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228-300x194.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228-768x498.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228-830x538.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228-230x149.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228-350x227.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228-480x311.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-228.png 1216w\" sizes=\"(max-width: 460px) 100vw, 460px\" \/><\/figure><\/div>\n\n\n\n<p>\u5728\u8fd9\u4e09\u8005\u7684\u5173\u7cfb\u4e2d\uff0c\u4fbf\u5229\u5e97\u5c31\u5145\u5f53\u4e86\u4ee3\u7406\u7684\u89d2\u8272\uff0c \u5f53\u7136\u8fd9\u4e2a\u4f8b\u5b50\u53ef\u80fd\u4e0d\u662f\u4e00\u76ee\u4e86\u7136\uff0c \u7528\u73b0\u5b9e\u751f\u6d3b\u4e2d\u7684\u623f\u5c4b\u79df\u8d41\u6216\u8005\u6cd5\u5f8b\u8bc9\u8bbc\u6765\u63cf\u8ff0\u5e94\u8be5\u66f4\u4e3a\u8d34\u5207\u3002<\/p>\n\n\n\n<p>\u6b63\u662f\u56e0\u4e3a\u5b58\u5728\u4fbf\u5229\u5e97\u8fd9\u8fd9\u4e2a\u4ee3\u7406\uff0c\u5de5\u5382\u4e0d\u9700\u8981\u5c06\u5927\u91cf\u7684\u5546\u54c1\u9010\u4e2a\u5bfb\u627e\u6d88\u8d39\u8005\u5e76\u51fa\u552e\u7ed9\u5bf9\u65b9\uff0c \u6d88\u8d39\u8005\u8d2d\u4e70\u591a\u79cd\u5546\u54c1\u65f6\uff0c\u4e5f\u4e0d\u9700\u8981\u5bfb\u627e\u591a\u4e2a\u5de5\u5382\u53bb\u4e00\u4e00\u8d2d\u4e70\uff0c \u901a\u8fc7\u4fbf\u5229\u5e97\u8fd9\u4e00\u4ee3\u7406\u89d2\u8272\uff0c \u6781\u5927\u7684\u7b80\u5316\u4e86\u5de5\u5382\u548c\u6d88\u8d39\u8005\u4e4b\u95f4\u7684\u4f9b\u9700\u5173\u7cfb\u3002<\/p>\n\n\n\n<p>\u901a\u8fc7\u4fbf\u5229\u5e97\u7684\u4f8b\u5b50\u53ef\u4ee5\u53d1\u73b0\uff0c \u4ee3\u7406\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\u53ef\u4ee5\u7ed9\u6211\u4eec\u5e26\u6765\u5f88\u591a\u904d\u5386\uff0c\u5c06\u590d\u6742\u7684\u4e8b\u60c5\u7b80\u5355\u5316\u3002\u751f\u6d3b\u4e2d\u5982\u6b64\uff0c\u4ee3\u7801\u4e2d\u4ea6\u662f\u5982\u6b64\u3002<\/p>\n\n\n\n<p><strong>2\u3001\u4ee3\u7406\u6a21\u5f0f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><code>\u4ee3\u7406\u6a21\u5f0f\u7ed9\u67d0\u4e2a\u5bf9\u8c61\u63d0\u4f9b\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff0c \u5e76\u7531\u4ee3\u7406\u5bf9\u8c61\u63a7\u5236\u5bf9\u539f\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u5f53\u7528\u6237\u4e0d\u9002\u5408\u6216\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u76ee\u6807\u5bf9\u8c61\u65f6\uff0c\u4ee3\u7406\u5bf9\u8c61\u4f5c\u4e3a\u7528\u6237\u548c\u76ee\u6807\u5bf9\u8c61\u4e4b\u95f4\u7684\u4e2d\u4ecb\u3002<\/code><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229-1024x736.png\" alt=\"\" class=\"wp-image-6606\" width=\"505\" height=\"362\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229-1024x736.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229-300x216.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229-768x552.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229-830x596.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229-230x165.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229-350x251.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229-480x345.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-229.png 1094w\" sizes=\"(max-width: 505px) 100vw, 505px\" \/><\/figure><\/div>\n\n\n\n<p><strong>\u4ee3\u7406\u6a21\u5f0f\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c \u5b83\u6709\u4ee5\u4e0b\u7279\u70b9<\/strong>\uff1a<\/p>\n\n\n\n<ul><li>\u4ee3\u7406\u7c7b\u548c\u59d4\u6258\u7c7b\u4e4b\u95f4\u5b58\u5728\u5173\u8054\u5173\u7cfb\uff0c \u4e00\u4e2a\u4ee3\u7406\u7c7b\u548c\u4e00\u4e2a\u59d4\u6258\u7c7b\u5173\u8054\u3002 <\/li><li>\u4ee3\u7406\u7c7b\u5e76\u4e0d\u63d0\u4f9b\u771f\u6b63\u670d\u52a1\uff0c \u800c\u662f\u53bb\u8c03\u7528\u59d4\u6258\u7c7b\u7684\u670d\u52a1\u3002 <\/li><li>\u7528\u6237\u901a\u8fc7\u8c03\u7528\u4ee3\u7406\u5bf9\u8c61\u95f4\u63a5\u7684\u53bb\u8c03\u7528\u59d4\u6258\u5bf9\u8c61\u7684\u670d\u52a1\u3002<\/li><li> \u4ee3\u7406\u7c7b\u4e3b\u8981\u8d1f\u8d23\u5728\u59d4\u6258\u7c7b\u88ab\u8c03\u7528\u7684\u524d\u540e\u505a\u4e00\u4e9b\u9884\u5904\u7406\u7684\u5de5\u4f5c\uff0c\u6bd4\u5982\u6253\u5370\u65e5\u5fd7\u3001\u5b89\u5168\u68c0\u67e5\u7b49\u3002<\/li><\/ul>\n\n\n\n<p><strong>\u4ee3\u7406\u6a21\u5f0f\u7684\u89d2\u8272<\/strong>\uff1a<\/p>\n\n\n\n<ul><li><strong>\u62bd\u8c61\u89d2\u8272\uff08Subject\uff09<\/strong>\uff1a \u901a\u8fc7\u63a5\u53e3\u6216\u62bd\u8c61\u7c7b\u58f0\u660e\u771f\u5b9e\u4e3b\u9898\u548c\u4ee3\u7406\u5bf9\u8c61\u5b9e\u73b0\u7684\u4e1a\u52a1\u65b9\u6cd5\u3002 <\/li><li><strong>\u771f\u5b9e\u89d2\u8272\uff08Real Subject\uff09<\/strong>\uff1a \u5b9e\u73b0\u4e86\u62bd\u8c61\u4e3b\u9898\u4e2d\u7684\u5177\u4f53\u4e1a\u52a1\uff0c\u662f\u4ee3\u7406\u5bf9\u8c61\u6240\u4ee3\u8868\u7684\u771f\u5b9e\u5bf9\u8c61\uff0c \u662f\u6700\u7ec8\u8981\u5f15\u7528\u7684\u5bf9\u8c61\u3002 <\/li><li><strong>\u4ee3\u7406\uff08Proxy\uff09<\/strong>: \u63d0\u4f9b\u4e86\u548c\u771f\u5b9e\u5bf9\u8c61\u76f8\u540c\u7684\u63a5\u53e3\uff0c\u5176\u5185\u90e8\u542b\u6709\u5bf9\u771f\u5b9e\u5bf9\u8c61\u7684\u5f15\u7528\uff0c \u5b83\u53ef\u4ee5\u8bbf\u95ee\u3001\u63a7\u5236\u6216\u6269\u5c55\u771f\u5b9e\u5bf9\u8c61\u7684\u529f\u80fd\u3002 <\/li><li><strong>\u7528\u6237\uff08User\uff09<\/strong>\uff1a \u4f7f\u7528\u4ee3\u7406\u7c7b\u6765\u8fdb\u884c\u4e00\u4e9b\u64cd\u4f5c\u3002<\/li><\/ul>\n\n\n\n<p><strong>\u4ee3\u7406\u6a21\u5f0f\u7684\u4f7f\u7528\u573a\u666f<\/strong>\uff1a<\/p>\n\n\n\n<ul><li>\u9690\u85cf\u67d0\u4e2a\u7c7b<\/li><li>\u6269\u5c55\u67d0\u4e2a\u7c7b\u7684\u529f\u80fd<\/li><\/ul>\n\n\n\n<p><strong>\u4f18\u70b9<\/strong><\/p>\n\n\n\n<ul><li>\u4ee3\u7406\u6a21\u5f0f\u5728\u5ba2\u6237\u7aef\u4e0e\u88ab\u4ee3\u7406\u5bf9\u8c61\u4e2d\u95f4\u8d77\u5230\u4e00\u4e2a\u4e2d\u4ecb\u4f5c\u7528\u548c\u4fdd\u62a4\u88ab\u4ee3\u7406\u5bf9\u8c61\u7684\u4f5c\u7528<\/li><li>\u4ee3\u7406\u5bf9\u8c61\u53ef\u4ee5\u6269\u5c55\u76ee\u6807\u5bf9\u8c61\u7684\u529f\u80fd<\/li><li>\u4ee3\u7406\u6a21\u5f0f\u53ef\u4ee5\u5c06\u5ba2\u6237\u7aef\u548c\u76ee\u6807\u5bf9\u8c61\u9694\u79bb\uff0c\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u964d\u4f4e\u7cfb\u7edf\u7684\u8026\u5408\u6027<\/li><\/ul>\n\n\n\n<p><strong>3\u3001\u51e0\u79cd\u4ee3\u7406\u6a21\u5f0f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>Java\u4e2d\u5b58\u57282\u79cd\u4ee3\u7406\u6a21\u5f0f\uff1a<strong>\u9759\u6001\u4ee3\u7406<\/strong>\u548c<strong>\u52a8\u6001\u4ee3\u7406<\/strong>\uff0c \u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230-1024x380.png\" alt=\"\" class=\"wp-image-6608\" width=\"566\" height=\"209\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230-1024x380.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230-300x111.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230-768x285.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230-830x308.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230-230x85.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230-350x130.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230-480x178.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-230.png 1428w\" sizes=\"(max-width: 566px) 100vw, 566px\" \/><\/figure><\/div>\n\n\n\n<p>\u56fe\u4e2d\u5173\u4e8e\u9759\u6001\u4ee3\u7406\u7684\u5177\u4f53\u7684\u4f7f\u7528\u63cf\u8ff0\u4e0d\u592a\u51c6\u786e\uff0c\u9759\u6001\u4ee3\u7406\u4e5f\u53ef\u4ee5\u4ee3\u7406\u591a\u4e2a\u76ee\u6807\u5bf9\u8c61\uff0c \u4f46\u662f\u5bf9\u4e8e\u4ee3\u7406\u7c7b\u7684\u5b9e\u73b0\u6210\u672c\u6bd4\u8f83\u9ad8\uff0c \u8981\u6c42\u4ee3\u7406\u7c7b\u5b9e\u73b0\u548c\u591a\u4e2a\u76ee\u6807\u5bf9\u8c61\u76f8\u540c\u7684\u63a5\u53e3\uff0c\u9020\u6210\u4ee3\u7406\u7c7b\u6bd4\u8f83\u590d\u6742\u7e41\u7410\u3002<\/p>\n\n\n\n<p><strong>4\u3001\u9759\u6001\u4ee3\u7406<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u9759\u6001\u4ee3\u7406\u65f6\u6700\u57fa\u7840\u3001\u6700\u6807\u51c6\u7684\u4ee3\u7406\u6a21\u5f0f\u3002\u4ee5\u79df\u623f\u4e3a\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<p><strong>1\u3001\u521b\u5efa\u4e00\u4e2a\u79df\u623f\u63a5\u53e3<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/**\n * \u79df\u623f\u63a5\u53e3\n *\/\npublic interface IRent {\n    void Rent();\n}\n<\/pre>\n\n\n\n<p><strong>2\u3001\u521b\u5efa\u4e00\u4e2a\u79df\u623f\u5b9e\u73b0\u7c7b<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class LandLord implements IRent {\n    @Override\n    public void Rent() {\n        System.out.println(\"\u623f\u5c4b\u51fa\u79df\");\n    }\n}\n<\/pre>\n\n\n\n<p><strong>3\u3001\u521b\u5efa\u4e00\u4e2a\u79df\u623f\u4ee3\u7406\u7c7b<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class RentProxy implements IRent {\n\n    private IRent rent;\n\n    public RentProxy(IRent rent){\n        this.rent = rent;\n    }\n\n    @Override\n    public void Rent() {\n        seeHouse();\n        this.rent.Rent();\n        fare();\n    }\n\n    void seeHouse(){\n        System.out.println(\"\u5e26\u5ba2\u6237\u53bb\u770b\u623f\");\n    }\n\n    void fare(){\n        System.out.println(\"\u6536\u53d6\u4e2d\u4ecb\u8d39\");\n    }\n}<\/pre>\n\n\n\n<p><strong>4\u3001\u521b\u5efa\u5ba2\u6237\u7aef<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class RentClient {\n    public static void main(String[] args) {\n        IRent rent = new LandLord();\n        IRent proxy = new RentProxy(rent);\n        proxy.Rent();\n    }\n}<\/pre>\n\n\n\n<p><strong>5\u3001\u8fd0\u884c\u7ed3\u679c<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231-1024x238.png\" alt=\"\" class=\"wp-image-6609\" width=\"616\" height=\"143\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231-1024x238.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231-300x70.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231-768x178.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231-830x193.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231-230x53.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231-350x81.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231-480x111.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-231.png 1414w\" sizes=\"(max-width: 616px) 100vw, 616px\" \/><\/figure><\/div>\n\n\n\n<p>\u5982\u4e0a\u4f8b\u5b50\u6240\u793a\uff0c\u9759\u6001\u4ee3\u7406\u7684\u4f7f\u7528\u65b9\u5f0f\u975e\u5e38\u7b80\u5355\uff0c \u901a\u8fc7\u7f16\u7a0b\u4e2d\u7684\u7ec4\u5408\u65b9\u6cd5\u53ef\u4ee5\u8f7b\u6613\u5b9e\u73b0\u4ee3\u7406\u7c7b\u5e76\u4e3a\u88ab\u4ee3\u7406\u5bf9\u8c61\u589e\u5f3a\u529f\u80fd\u3002<strong>\u4ee3\u7406\u6a21\u5f0f\u53ef\u4ee5\u5728\u4e0d\u4fee\u6539\u88ab\u4ee3\u7406\u5bf9\u8c61\u7684\u57fa\u7840\u4e0a\uff0c\u901a\u8fc7\u4ee3\u7406\u7c7b\uff0c\u8fdb\u884c\u4e00\u4e9b\u529f\u80fd\u7684\u6269\u5c55\u548c\u589e\u5f3a<\/strong>\u3002\u503c\u5f97\u6ce8\u610f\u7684\u65f6\uff0c\u4ee3\u7406\u7c7b\u548c\u88ab\u4ee3\u7406\u5bf9\u8c61\u5e94\u8be5\u5b9e\u73b0\u7edf\u4e00\u63a5\u53e3\uff0c\u6216\u8005\u5171\u540c\u7ee7\u627f\u67d0\u4e2a\u7c7b\u3002<\/p>\n\n\n\n<p>\u9759\u6001\u4ee3\u7406\u9700\u8981\u9884\u5148\u5b9a\u4e49\u597d\u5e76\u4e14\u548c\u88ab\u4ee3\u7406\u5bf9\u8c61\u7ed1\u5b9a\uff0c\u5e76\u4e14\u5b9e\u73b0\u548c\u88ab\u4ee3\u7406\u5bf9\u8c61\u4e00\u6837\u7684\u63a5\u53e3\uff0c\u5982\u679c\u4e1a\u52a1\u975e\u5e38\u5e9e\u5927\uff0c\u5c31\u9700\u8981\u5b9a\u4e49\u5927\u91cf\u7684\u4ee3\u7406\u7c7b\uff0c\u5e76\u4e14\u5982\u679c\u4e1a\u52a1\u589e\u52a0\u65b0\u7684\u65b9\u6cd5\uff0c\u76ee\u6807\u5bf9\u8c61\u548c\u4ee3\u7406\u5bf9\u8c61\u90fd\u9700\u8981\u540c\u65f6\u7ef4\u62a4\uff0c\u7ef4\u62a4\u6210\u672c\u6bd4\u8f83\u9ad8\u3002<\/p>\n\n\n\n<p>\u6bd4\u5982\u4e0a\u9762\u7684\u79df\u623f\u7684\u540c\u65f6\uff0c\u8fd8\u6709\u642c\u5bb6\u7684\u9700\u6c42\uff0c\u5982\u679c\u6211\u4eec\u540c\u65f6\u5b9e\u73b0\u4e00\u4e2a\u642c\u5bb6\u7684\u4ee3\u7406\uff0c\u67092\u79cd\u65b9\u5f0f\uff1a<br>1\uff09\u521b\u5efa\u65b0\u7684\u642c\u5bb6\u7684\u4ee3\u7406\u7c7b\uff0c\u597d\u5904\u662f\u4ee3\u7801\u7b80\u5355\u6613\u61c2\uff0c\u8026\u5408\u6027\u4f4e\uff0c\u7f3a\u70b9\u662f\u9700\u8981\u521b\u5efa\u5e76\u7ef4\u62a4\u4e00\u4e2a\u65b0\u7684\u4ee3\u7406\u7c7b\u3002<br>2\uff09\u5728\u79df\u623f\u4ee3\u7406\u7c7b\u4e2d\u540c\u65f6\u4ee3\u7406\u642c\u5bb6\u7684\u9700\u6c42\uff0c\u597d\u5904\u662f\u4e0d\u9700\u8981\u521b\u5efa\u7ef4\u62a4\u65b0\u7684\u4ee3\u7406\u7c7b\uff0c\u7f3a\u70b9\u662f\u8be5\u4ee3\u7406\u7c7b\u53d8\u5f97\u6bd4\u8f83\u590d\u6742\u81c3\u80bf\uff0c\u540c\u6837\u7ef4\u62a4\u6210\u672c\u8f83\u9ad8\u3002<br>\u5728\u4e1a\u52a1\u6bd4\u8f83\u7b80\u5355\u7684\u65f6\u5019\uff0c\u9759\u6001\u4ee3\u7406\u975e\u5e38\u9002\u5408\u4f5c\u4e3a\u4ee3\u7406\u6a21\u5f0f\u7684\u751f\u4ea7\u5b9e\u73b0\uff0c\u4f46\u662f\u968f\u7740\u4ee3\u7801\u91cf\u9010\u6e10\u589e\u957f\uff0c\u4e1a\u52a1\u53d8\u5f97\u590d\u6742\uff0c \u9759\u6001\u4ee3\u7406\u7684\u7f3a\u70b9\u5c31\u4f1a\u51f8\u663e\u51fa\u6765\u3002<\/p>\n\n\n\n<p><strong>\u9759\u6001\u4ee3\u7406\u7684\u7279\u70b9\uff1a<\/strong><\/p>\n\n\n\n<ul><li>\u4ee3\u7406\u7c7b\u9700\u8981\u4ee3\u7801\u8fd0\u884c\u524d\u521b\u5efa\u597d<\/li><li>\u4ee3\u7406\u7c7b\u9700\u8981\u5728\u662f\u5b9e\u73b0\u65f6\u5c31\u6307\u5b9a\u4e0e\u88ab\u4ee3\u7406\u7c7b\u76f8\u540c\u7684\u63a5\u53e3<\/li><\/ul>\n\n\n\n<p>\u603b\u4f53\u6765\u8bf4\uff0c \u9759\u6001\u4ee3\u7406\u5b9e\u73b0\u6bd4\u8f83\u7b80\u5355\u6613\u61c2\uff0c\u4f46\u662f\u4ee3\u7801\u8026\u5408\u6027\u8f83\u9ad8\uff0c \u7ef4\u62a4\u6210\u672c\u9ad8\uff0c\u4e1a\u52a1\u590d\u6742\u7684\u573a\u666f\u4e0b\u4e0d\u9002\u5408\u4f7f\u7528\u3002<\/p>\n\n\n\n<p><strong>5\u3001\u52a8\u6001\u4ee3\u7406<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u4ee3\u7406\u7c7b\u5728\u4ee3\u7801\u8fd0\u884c\u65f6\u521b\u5efa\u7684\u4ee3\u7406\u79f0\u4e4b\u4e3a<strong>\u52a8\u6001\u4ee3\u7406<\/strong>\u3002\u52a8\u6001\u4ee3\u7406\u4e2d\u4ee3\u7406\u7c7b\u5e76\u4e0d\u662f\u9884\u5148\u5728Java\u4ee3\u7801\u4e2d\u5b9a\u4e49\u597d\u7684\uff0c\u800c\u662f\u8fd0\u884c\u65f6\u7531JVM\u52a8\u6001\u751f\u6210\uff0c\u5e76\u4e14\u53ef\u4ee5\u4ee3\u7406\u591a\u4e2a\u76ee\u6807\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p><strong>5.1\u3001\u52a8\u6001\u4ee3\u7406\u7684\u539f\u7406<\/strong>\uff1a<\/p>\n\n\n\n<p>\u52a8\u6001\u4ee3\u7406\u7684\u672c\u8d28\u662f\u5728\u5b57\u8282\u7801\u7684\u52a0\u8f7d\u8fc7\u7a0b\u4e2d\u751f\u6210<code>Proxy<\/code>\u5b57\u8282\u7801\uff0c\u8fd9\u6837\u5c31\u5177\u5907\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b\u7684\u80fd\u529b\u3002<\/p>\n\n\n\n<p><em>\u7c7b\u7684\u52a0\u8f7d\u8fc7\u7a0b<\/em>\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232-1024x613.png\" alt=\"\" class=\"wp-image-6611\" width=\"559\" height=\"334\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232-1024x613.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232-300x179.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232-768x459.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232-830x497.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232-230x138.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232-350x209.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232-480x287.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-232.png 1404w\" sizes=\"(max-width: 559px) 100vw, 559px\" \/><\/figure><\/div>\n\n\n\n<p>\u5728\u8fd0\u884c\u65f6\u671f\u6309\u7167class\u6587\u4ef6\u7684\u7ec4\u7ec7\u89c4\u8303\u751f\u6210\u65b0\u7684\u5b57\u8282\u7801\u5c31\u53ef\u4ee5\u751f\u6210\u65b0\u7684Java\u7c7b\u3002\u5728Java\u4e2d\u6709\u591a\u4e2a\u7c7b\u5e93\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e9b\u529f\u80fd\uff0c \u6bd4\u5982ASM, javaasist\u7b49\u3002<\/p>\n\n\n\n<p><strong>5.2\u3001Java\u4e2d\u52a8\u6001\u4ee3\u7406\u7684\u5b9e\u73b0\u65b9\u5f0f<\/strong>\uff1a<\/p>\n\n\n\n<ul><li><strong>jdk \u52a8\u6001\u4ee3\u7406<\/strong>\uff1aJava\u5728JDK1.3\u540e\u5f15\u5165\u7684\u52a8\u6001\u4ee3\u7406\u673a\u5236\uff0c \u53ef\u4ee5\u5728\u8fd0\u884c\u671f\u52a8\u6001\u7684\u521b\u5efa\u4ee3\u7406\u7c7b\uff0c \u53ea\u652f\u6301\u63a5\u53e3\u65b9\u5f0f\uff0c \u4f7f\u7528\u53cd\u5c04\u5b9e\u73b0\u3002<\/li><li><strong>cglib \u52a8\u6001\u4ee3\u7406<\/strong>\uff1acglib\u662f\u4e00\u4e2a\u5f3a\u5927\u3001\u9ad8\u6548\u7684\u5b57\u8282\u7801\u751f\u6210\u7c7b\u5e93\uff0c\u5e95\u5c42\u91c7\u7528\u4e86ASM\u3002cglib\u901a\u8fc7\u64cd\u7eb5\u5b57\u8282\u7801\u6765\u5b9e\u73b0\u52a8\u6001\u4ee3\u7406\uff0c\u4e0d\u5f3a\u5236\u4ee3\u7406\u5bf9\u8c61\u5fc5\u987b\u5b9e\u73b0\u63a5\u53e3\uff0c \u652f\u6301\u901a\u8fc7\u7ee7\u627f\u4ee3\u7406\u7c7b\u7684\u5b50\u7c7b\u7684\u65b9\u5f0f\u6765\u5b8c\u6210\u4ee3\u7406\u3002<\/li><\/ul>\n\n\n\n<ul><li><strong>javaasist \u52a8\u6001\u4ee3\u7406<\/strong>\uff1ajavaasist\u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u521b\u5efa\u3001\u5206\u6790\u3001\u7f16\u8f91Java\u5b57\u8282\u7801\u7684\u7c7b\u5e93\u3002\u4e3b\u8981\u7684\u4f18\u70b9\u5728\u4e8e\u7b80\u5355\u3001\u5feb\u901f\uff0c\u4f7f\u7528\u8005\u4e0d\u9700\u8981\u4e86\u89e3\u6c47\u7f16\u6307\u4ee4\uff0c\u5c31\u53ef\u6709\u52a8\u6001\u4fee\u6539\u7c7b\u7684\u7ed3\u6784\u6216\u8005\u52a8\u6001\u751f\u6210\u7c7b\u3002javaasist\u81ea\u5e26\u52a8\u6001\u4ee3\u7406\u7684\u5b9e\u73b0\u3002<\/li><li><strong>javaasist \u5b57\u8282\u7801<\/strong>\uff1ajavaasist\u652f\u6301\u4f7f\u7528\u5b57\u7b26\u4e32\u52a8\u6001\u62fc\u63a5Java\u6e90\u4ee3\u7801\u7684\u65b9\u5f0f\u751f\u6210class\u5b57\u8282\u7801\u6765\u5b9e\u73b0\u52a8\u6001\u4ee3\u7406\u3002<\/li><\/ul>\n\n\n\n<ul><li><strong>ASM\u5b57\u8282\u7801<\/strong>: ASM\u662f\u4e00\u4e2aJava\u5b57\u8282\u7801\u64cd\u63a7\u6846\u67b6\uff0c \u5b83\u80fd\u591f\u4ee5\u4e8c\u8fdb\u5236\u5f62\u5f0f\u4fee\u6539\u5df2\u6709\u7c7b\u6216\u8005\u52a8\u6001\u751f\u6210\u7c7b\u3002ASM\u53ef\u4ee5\u76f4\u63a5\u4ea7\u751f\u4e8c\u8fdb\u5236class\u6587\u4ef6\uff0c \u4e5f\u53ef\u4ee5\u5728\u7c7b\u88ab\u52a0\u8f7d\u5982JVM\u865a\u62df\u673a\u4e4b\u524d\u6539\u53d8\u7c7b\u884c\u4e3a\u3002ASM\u5728\u521b\u5efaclass\u5b57\u8282\u7801\u7684\u8fc7\u7a0b\u4e2d\uff0c\u64cd\u7eb5\u7684\u662f\u5e95\u5c42JVM\u7684\u6c47\u7f16\u6307\u4ee4\uff0c\u8981\u6c42\u4f7f\u7528\u8005\u5bf9class\u7684\u7ed3\u6784\u548cJVM\u6c47\u7f16\u6307\u4ee4\u6bd4\u8f83\u4e86\u89e3\u3002<\/li><\/ul>\n\n\n\n<p><strong>5.3\u3001\u5b9e\u73b0\u65b9\u5f0f\u5bf9\u6bd4<\/strong><\/p>\n\n\n\n<p>\u4ece\u6613\u7528\u6027\u4e0a\u6765\u8bf4\uff1a<\/p>\n\n\n\n<ul><li>1\u3001JDK\u4ee3\u7406\u7684\u5b9e\u73b0\u65b9\u5f0f\u6700\u7b80\u5355\uff0c \u4e0d\u8fc7\u53ea\u80fd\u4ee3\u7406\u63a5\u53e3\u3002<\/li><li>2\u3001\u5176\u6b21\u662fCGLIB, \u4f7f\u7528\u4e5f\u5f88\u65b9\u4fbf\uff0c \u4e0d\u8fc7\u9700\u8981\u989d\u5916\u5f15\u5165CGLIB\u7684Jar\u5305\u3002<\/li><li>3\u3001Javaasist\u9700\u8981\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5Java\u6e90\u4ee3\u7801\uff0c \u6bd4\u8f83\u7e41\u7410\u3002<\/li><li>4\u3001ASM\u9700\u8981\u624b\u5de5\u5199\u5b57\u8282\u7801\uff0c \u5bf9\u4e2a\u4eba\u8981\u6c42\u6bd4\u8f83\u9ad8\u3002<\/li><\/ul>\n\n\n\n<p>\u603b\u4f53\u800c\u8a00ASM\u548cJavaasist\u6027\u80fd\u6700\u597d\uff0c JDK\u548cCGLIB\u4f7f\u7528\u65b9\u4fbf\uff0c \u751f\u4ea7\u73af\u5883\u4e0b\u5982\u679c\u8981\u517c\u987e\u6613\u7528\u6027\u548c\u6027\u80fd\uff0c\u63a8\u8350\u4f7f\u7528Javaasist, \u5176\u4ed6\u60c5\u51b5\u4e0bCGLIB\u6bd4\u8f83\u5408\u9002\u3002<\/p>\n\n\n\n<p><strong>\u4e8c\u3001\u52a8\u6001\u4ee3\u7406<\/strong><\/p>\n\n\n\n<p><strong>1\u3001JDK \u52a8\u6001\u4ee3\u7406<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>1.1\u3001\u6982\u8ff0<\/strong><\/p>\n\n\n\n<p>JDK\u52a8\u6001\u4ee3\u7406\u662fJava JDK\u81ea\u5e26\u7684\u4e00\u4e2a\u52a8\u6001\u4ee3\u7406\u5b9e\u73b0\uff0c \u4f4d\u4e8e<code>java.lang.reflect<\/code>\u5305\u4e0b\u3002JDK\u52a8\u6001\u4ee3\u7406\u4e3b\u8981\u5305\u542b\u4e24\u4e2a\u91cd\u8981\u7684\u7c7b\uff1a<\/p>\n\n\n\n<ul><li><code>java.lang.reflect.Proxy<\/code>: <code>Proxy<\/code>\u8d1f\u8d23\u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\u3002<code>Proxy<\/code>\u7c7b\u6709\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u65b9\u6cd5\uff1a<code>Proxy.newProxyInstance(ClassLoader classLoader, Class&lt;?&gt;[] interfaces, InvocationHandler h)<\/code>, \u5b83\u7684\u529f\u80fd\u5c31\u662f\u6839\u636e\u88ab\u4ee3\u7406\u7c7b\u548cInvocationHandler \u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b\u7684class\u5b57\u8282\u7801, \u5e76\u8fd4\u56de\u52a8\u6001\u4ee3\u7406\u7c7b\u5b9e\u4f8b\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>java.lang.reflect.InvocationHandler<\/code>: <code>InvocationHandler<\/code>\u8d1f\u8d23\u5177\u4f53\u7684\u4ee3\u7406\u65b9\u6cd5\u5b9e\u73b0\u3002<code>InvocationHandler<\/code>\u63a5\u53e3\u53ea\u6709\u4e00\u4e2a\u65b9\u6cd5\uff1a<code>invoke(Object proxy, Method method, Object[] args)<\/code>, \u8be5\u65b9\u6cd5\u5229\u7528\u53cd\u5c04\u6765\u8c03\u7528\u88ab\u4ee3\u7406\u7c7b\u7684\u6307\u5b9a\u65b9\u6cd5\u5e76\u8fd4\u56de\u7ed3\u679c\uff0c \u5e76\u4e14\u5728\u8be5\u65b9\u6cd5\u4e2d\u53ef\u4ee5\u8c03\u7528\u4ee3\u7406\u7c7b\u7684\u5176\u4ed6\u65b9\u6cd5\u5728\u8c03\u7528\u524d\u540e\u6267\u884c\u4e00\u4e9b\u5176\u4ed6\u52a8\u4f5c\u6765\u589e\u5f3a\u76ee\u6807\u7c7b\u7684\u529f\u80fd\uff0c \u6bd4\u5982\u5b89\u5168\u68c0\u67e5\u3001\u6253\u5370\u65e5\u5fd7\u7b49\u7b49\u3002<\/li><\/ul>\n\n\n\n<p>\u521b\u5efaJDK\u52a8\u6001\u4ee3\u7406\u9700\u8981\u5148\u5b9e\u73b0InvocationHandler\u63a5\u53e3\uff0c \u5e76\u91cd\u5199\u5176\u4e2d\u7684invoke\u65b9\u6cd5\uff0c\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul><li>\u521b\u5efa\u4e00\u4e2a\u4e1a\u52a1\u63a5\u53e3\u548c\u4e1a\u52a1\u7684\u5b9e\u73b0\u7c7b\u3002 <\/li><li>\u521b\u5efa\u4e00\u4e2a\u7c7b\u5b9e\u73b0InvocationHandler\u63a5\u53e3\u5e76\u91cd\u5199invoke\u65b9\u6cd5\u3002 <\/li><li>\u8c03\u7528Proxy.newProxyInstance\u65b9\u6cd5\u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\u7684class\u5b57\u8282\u7801\u5e76\u8fd4\u56de\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u5b9e\u4f8b\u3002 <\/li><li>\u5ba2\u6237\u7aef\u8c03\u7528\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u5177\u4f53\u4e1a\u52a1\u65b9\u6cd5\u3002<\/li><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/1\u3001\u521b\u5efaIBusinessService\u63a5\u53e3\uff0c \u5305\u542b\u82e5\u5e72\u4e1a\u52a1\u65b9\u6cd5someMethod;\n\/\/2\u3001\u521b\u5efaIBusinessService\u63a5\u53e3\u7684\u5177\u4f53\u5b9e\u73b0\u7c7bBusinessService;\n\/\/3\u3001\u521b\u5efaInvocationHandler\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7bSomeInvocationHandler\uff0c \u5e76\u91cd\u5199invoke\u65b9\u6cd5\uff1b\n\n\/\/4.1\u3001\u521b\u5efaBusinessService\u5b9e\u4f8b;\nIBusinessService businessService = new BusinessService();\n\n\/\/4.2\u3001\u83b7\u5f97BusinessService\u5b9e\u4f8b\u7684\u7c7b\u52a0\u8f7d\u5668;\nClassLoader classLoader = businessService.getClass().getClassLoader();\n\n\/\/4.3\u3001\u83b7\u5f97BusinessService\u5b9e\u4f8b\u5b9e\u73b0\u7684\u63a5\u53e3\u96c6\u5408;\nClass&lt;?> interfaces = businessService.getClass().getInterfaces();\n\n\/\/4.4\u3001\u521b\u5efaInvocationHandler\u7684\u5b9e\u4f8b\uff1b\nSomeInvocationHandler invocationHandler = new SomeInvocationHandler(businessService);\n\n\/\/4.5\u3001\u8c03\u7528Proxy\u7c7b\u751f\u6210BusinessService\u7684\u4ee3\u7406\u7c7b\u5b9e\u4f8b\uff1b\nIBusinessService businessProxy = (IBusinessService) Proxy.newProxyInstance(classLoader, interfaces, invocationHandler);\n\n\/\/4.6\u3001\u8c03\u7528\u4ee3\u7406\u7c7b\u7684\u4e1a\u52a1\u65b9\u6cd5\u83b7\u53d6\u7ed3\u679c\u3002\nbusinessProxy.someMethod();<\/pre>\n\n\n\n<p>JDK\u52a8\u6001\u4ee3\u7406\u8981\u6c42\u88ab\u4ee3\u7406\u5bf9\u8c61\u5fc5\u987b\u5b9e\u73b0\u63a5\u53e3\uff0c \u4e0d\u652f\u6301\u7ee7\u627f\uff0c \u67092\u70b9\u539f\u56e0\uff1a<\/p>\n\n\n\n<ul><li><code>Proxy.newProxyInstance<\/code>\u65b9\u6cd5\u751f\u6210\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\u81ea\u8eab\u5df2\u7ecf\u7ee7\u627f\u4e86<code>java.lang.reflect.Proxy<\/code>\u7c7b\uff0c \u800cJava\u662f\u4e0d\u652f\u6301\u591a\u7ee7\u627f\u7684\u3002<\/li><li><code>Proxy.newProxyInstance<\/code>\u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u65f6\u5019\u662f\u6839\u636e\u88ab\u4ee3\u7406\u7c7b\u5b9e\u73b0\u7684\u63a5\u53e3interfaces\u6765\u52a8\u6001\u751f\u6210\u65b9\u6cd5\uff0c \u5982\u679c\u88ab\u4ee3\u7406\u7c7b\u4e0d\u5b9e\u73b0\u4efb\u4f55\u63a5\u53e3\uff0c\u5b83\u81ea\u8eab\u7684\u65b9\u6cd5\u662f\u65e0\u6cd5\u586b\u5145\u5230\u52a8\u6001\u4ee3\u7406\u7c7b\u4e2d\uff0c \u751f\u6210\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\u5c31\u4f1a\u4e0d\u5305\u542b\u81ea\u8eab\u7684\u4e1a\u52a1\u65b9\u6cd5\uff0c\u5bfc\u81f4\u65e0\u6cd5\u5c06\u52a8\u6001\u4ee3\u7406\u7c7b\u7c7b\u578b\u8f6c\u6362\u4e3a\u88ab\u4ee3\u7406\u7c7b\uff0c \u5e76\u4e14\u751f\u6210\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\u65e0\u6cd5\u88ab\u8c03\u7528\u3002<\/li><\/ul>\n\n\n\n<p><strong>1.2\u3001\u5e94\u7528\u4e3e\u4f8b<\/strong><\/p>\n\n\n\n<p>\u4ee5\u524d\u9762\u79df\u623f\u7684\u573a\u666f\u4e3a\u4f8b\uff0c \u4f7f\u7528JDK\u52a8\u6001\u4ee3\u7406\u6765\u63cf\u8ff0\u5b83\u7684\u4f7f\u7528\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<p><strong>1.\u521b\u5efa\u4e00\u4e2a\u79df\u623f\u7684\u63a5\u53e3<code>IRent<\/code>.<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public interface IRent {\n    void Rent();\n}<\/pre>\n\n\n\n<p><strong>2.\u521b\u5efa\u79df\u623f\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b<code>RentService<\/code>.<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class RentService implements IRent {\n    @Override\n    public void Rent() {\n        System.out.println(\"\u623f\u5c4b\u51fa\u79df\");\n    }\n}<\/pre>\n\n\n\n<p><strong>3.\u521b\u5efa\u4e00\u4e2a<code>InvocationHandler<\/code>\u7684\u5b9e\u73b0\u7c7b<code>LogHandler<\/code>, \u76ee\u6807\u662f\u589e\u5f3a\u88ab\u4ee3\u7406\u7c7b\u7684\u65e5\u5fd7\u884c\u4e3a\uff0c\u5728\u65b9\u6cd5\u6267\u884c\u524d\u540e\u6253\u5370\u65e5\u5fd7.<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class LogHandler implements InvocationHandler {\n    private Object target; \/\/ \u88ab\u4ee3\u7406\u5bf9\u8c61\n\n    public LogHandler(Object target){\n        this.target = target;\n    }\n\n    @Override\n    public Object invoke(Object o, Method method, Object[] objects) throws Throwable {\n        before(); \/\/ \u4e8b\u524d\u6267\u884c\u65b9\u6cd5\uff0c \u6bd4\u5982\u6253\u5370\u65e5\u5fd7\uff0c \u53c2\u6570\u6821\u9a8c\n        Object result =  method.invoke(target, objects);\n        after(); \/\/ \u4e8b\u540e\u6267\u884c\u65b9\u6cd5\uff0c \u6bd4\u5982\u5b89\u5168\u68c0\u67e5\n        return result; \/\/ \u8fd4\u56de\u6267\u884c\u7ed3\u679c\n    }\n\n    void before(){\n        System.out.println(\"\u5f00\u59cb\u6253\u5370\u65e5\u5fd7\");\n    }\n\n    void after(){\n        System.out.println(\"\u5b8c\u6210\u6253\u5370\u65e5\u5fd7\");\n    }\n}<\/pre>\n\n\n\n<p><strong>4.\u521b\u5efa\u5ba2\u6237\u7aef<code>UserClient<\/code>\uff0c \u751f\u6210\u4ee3\u7406\u5bf9\u8c61\u5e76\u8f93\u51fa\u7ed3\u679c.<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserClient {\n    public static void main(String[] args) {\n\n        System.getProperties().put(\"jdk.proxy.ProxyGenerator.saveGeneratedFiles\", \"true\");\n\n        \/\/ \u88ab\u4ee3\u7406\u5bf9\u8c61\n        RentService rentService = new RentService();\n\n        \/\/ \u88ab\u4ee3\u7406\u5bf9\u8c61\u7c7b\u52a0\u8f7d\u5668\n        ClassLoader classLoader = rentService.getClass().getClassLoader();\n\n        \/\/ \u88ab\u4ee3\u7406\u5bf9\u8c61\u63a5\u53e3\u96c6\u5408\n        Class&lt;?>[] interfaces = rentService.getClass().getInterfaces();\n\n        \/\/ \u8bf7\u6c42\u5904\u7406\u5668\uff0c \u5904\u7406\u6240\u6709\u7684\u4ee3\u7406\u5bf9\u8c61\u4e0a\u7684\u65b9\u6cd5\u8c03\u7528\n        LogHandler logHandler = new LogHandler(rentService);\n\n        \/\/ \u521b\u5efa\u4ee3\u7406\u5bf9\u8c61\n        IRent rentProxy = (IRent) Proxy.newProxyInstance(classLoader, interfaces, logHandler);\n\n        \/\/ \u8c03\u7528\u4ee3\u7406\u7684\u65b9\u6cd5\n        rentProxy.Rent();\n    }\n}<\/pre>\n\n\n\n<p><strong>5.\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-233-1024x279.png\" alt=\"\" class=\"wp-image-6612\" width=\"482\" height=\"130\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-233-1024x279.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-233-300x82.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-233-768x209.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-233-830x226.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-233-230x63.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-233-350x95.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-233.png 1372w\" sizes=\"(max-width: 482px) 100vw, 482px\" \/><\/figure><\/div>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u4e0d\u4ec5\u8f93\u51fa\u4e86\u88ab\u4ee3\u7406\u5bf9\u8c61\u7684\u7ed3\u679c\uff0c \u8fd8\u5206\u522b\u5728\u4e0a\u4e0b\u6587\u8f93\u51fa\u4e86<code>LogHander<\/code>\u7684<code>before()<\/code>\u548c<code>after()<\/code>\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<p>\u4ece\u4e0a\u9762\u53ef\u4ee5\u770b\u5230\uff0c JDK\u52a8\u6001\u4ee3\u7406\u4e0d\u9700\u8981\u4e8b\u5148\u5b9a\u4e49\u597d\u4ee3\u7406\u7c7b\u5e76\u4e14\u548c\u76ee\u6807\u7c7b\u7ed1\u5b9a\uff0c \u800c\u662f\u901a\u8fc7\u5b9e\u73b0\u4e00\u4e2a<code>InvocationHandler<\/code>\u7684\u5b9e\u73b0\u7c7b\uff0c\u5728\u5b83\u7684<code>invoke<\/code>\u65b9\u6cd5\u4e2d\u5b9e\u73b0\u5bf9\u88ab\u4ee3\u7406\u7c7b\u7684\u8c03\u7528\uff0c\u5e76\u4e14\u589e\u5f3a\u539f\u6709\u7684\u529f\u80fd\u3002JDK\u4ee3\u7406\u901a\u8fc7\u8c03\u7528<code>Proxy.newProxyInstance()<\/code>\u65b9\u6cd5\u6765\u52a8\u6001\u751f\u6210\u4e00\u4e2a\u4ee3\u7406\u7c7b\uff0c\u5e76\u4e14\u4e0d\u9700\u8981\u6211\u4eec\u624b\u52a8\u53bb\u5904\u7406\u52a8\u6001\u4ee3\u7406\u7c7b\u548c\u76ee\u6807\u7c7b\u5b9e\u73b0\u76f8\u540c\u7684\u63a5\u53e3\uff0c \u4ee5\u53ca\u5728\u52a8\u6001\u4ee3\u7406\u7c7b\u4e2d\u7ef4\u62a4\u63a5\u53e3\u7684\u4e1a\u52a1\u65b9\u6cd5\uff0c \u5982\u679c\u4e1a\u52a1\u65b9\u6cd5\u6709\u65b0\u589e\u3001\u4fee\u6539\u3001\u5220\u9664\uff0c JDK\u52a8\u6001\u4ee3\u7406\u4f1a\u81ea\u52a8\u5e2e\u6211\u4eec\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p>JDK\u52a8\u6001\u4ee3\u7406\u8fd8\u6709\u4e00\u4e2a\u597d\u5904\uff0c \u5c31\u662f\u5bf9\u4e8e\u540c\u4e00\u7c7b\u578b\u7684\u4ee3\u7406\u9700\u6c42\u53ea\u9700\u8981\u5b9e\u73b0\u4e00\u4e2a<code>InvocationHandler<\/code>\uff0c \u8be5<code>InvocationHandler<\/code>\u4e0d\u9700\u8981\u548c\u88ab\u4ee3\u7406\u63a5\u53e3\u7ed1\u5b9a\uff0c \u6240\u4ee5\u52a8\u6001\u4ee3\u7406\u53ef\u4ee5\u7ed1\u5b9a\u591a\u4e2a\u4ee3\u7406\u7c7b\u800c\u4e0d\u9700\u8981\u91cd\u65b0\u5b9e\u73b0\u3002<br>\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u8fd8\u662f\u6bd4\u5982\u6211\u4eec\u6709\u4e00\u4e2a\u642c\u5bb6\u7684\u9700\u6c42\uff0c\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u642c\u5bb6\u7684\u4e1a\u52a1\u63a5\u53e3<code>IMove<\/code>\u548c\u5b9e\u73b0\u7c7b<code>MoveService<\/code>:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/ \u642c\u5bb6\u63a5\u53e3\npublic interface IMove {\n    void move();\n}\n\/\/ \u642c\u5bb6\u5b9e\u73b0\u7c7b\npublic class MoveService implements IMove{\n    @Override\n    public void move() {\n        System.out.println(\"\u642c\u5bb6\");\n    }\n}\n\n<\/pre>\n\n\n\n<p>\u7136\u540e\uff0c\u6211\u4eec\u5728\u642c\u5bb6\u4e1a\u52a1\u4e2d\u4e5f\u9700\u8981\u65e5\u5fd7\u589e\u5f3a\u7684\u529f\u80fd\uff0c \u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u662f\u53ef\u4ee5\u590d\u7528\u4e4b\u524d\u5b9e\u73b0\u7684\u65e5\u5fd7\u589e\u5f3a\u4ee3\u7406<code>LogHandler<\/code>\u3002\u770b\u770b\u5ba2\u6237\u7aef\u540c\u65f6\u751f\u6210\u79df\u623f\u548c\u642c\u5bb6\u7684\u65e5\u5fd7\u589e\u5f3a\u4ee3\u7406\u5e76\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">  public static void main(String[] args) {\n\n        System.getProperties().put(\"jdk.proxy.ProxyGenerator.saveGeneratedFiles\", \"true\");\n\n        \/\/ \u88ab\u4ee3\u7406\u5bf9\u8c61\n        RentService rentService = new RentService();\n\n        \/\/ \u88ab\u4ee3\u7406\u5bf9\u8c61\u7c7b\u52a0\u8f7d\u5668\n        ClassLoader classLoader = rentService.getClass().getClassLoader();\n\n        \/\/ \u88ab\u4ee3\u7406\u5bf9\u8c61\u63a5\u53e3\u96c6\u5408\n        Class&lt;?>[] interfaces = rentService.getClass().getInterfaces();\n\n        \/\/ \u8bf7\u6c42\u5904\u7406\u5668\uff0c \u5904\u7406\u6240\u6709\u7684\u4ee3\u7406\u5bf9\u8c61\u4e0a\u7684\u65b9\u6cd5\u8c03\u7528\n        LogHandler logHandler = new LogHandler(rentService);\n\n        \/\/ \u521b\u5efa\u4ee3\u7406\u5bf9\u8c61\n        IRent rentProxy = (IRent) Proxy.newProxyInstance(classLoader, interfaces, logHandler);\n\n        \/\/ \u8c03\u7528\u4ee3\u7406\u7684\u65b9\u6cd5\n        rentProxy.Rent();\n\n        IMove moveProxy = (IMove) Proxy.newProxyInstance(MoveService.class.getClassLoader(), MoveService.class.getInterfaces(),\n                new LogHandler(new MoveService()));\n        moveProxy.move();\n\n\n    }\n\n}<\/pre>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234-1024x239.png\" alt=\"\" class=\"wp-image-6613\" width=\"578\" height=\"135\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234-1024x239.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234-300x70.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234-768x179.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234-830x194.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234-230x54.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234-350x82.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234-480x112.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-234.png 1404w\" sizes=\"(max-width: 578px) 100vw, 578px\" \/><\/figure><\/div>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u5728<code>UserClient<\/code>\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>LogHandler<\/code>\u540c\u65f6\u751f\u6210\u4e86<code>RentService<\/code>\u548c<code>MoveService<\/code>\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\uff0c\u5b83\u4eec2\u4e2a\u7684\u52a8\u6001\u4ee3\u7406\u5b9e\u4f8b\u88ab\u8c03\u7528\u8fc7\u7a0b\u4e2d\u90fd\u8f93\u51fa\u4e86<code>LogHandler<\/code>\u7684\u65e5\u5fd7\u5185\u5bb9\u3002JDK\u52a8\u6001\u4ee3\u7406\u7684\u8fd9\u4e00\u7279\u6027\u975e\u5e38\u65b9\u4fbf\u6211\u4eec\u5b9e\u73b0\u4e00\u4e9b\u901a\u7528\u7684\u529f\u80fd\u6bd4\u5982\u53c2\u6570\u68c0\u67e5\u3001\u5b89\u5168\u68c0\u67e5\u3001\u65e5\u5fd7\u8f93\u51fa\u7b49\u7b49\u3002<\/p>\n\n\n\n<p>JDK\u52a8\u6001\u4ee3\u7406\u7684\u4f7f\u7528\u4e5f\u5f88\u7b80\u5355\u660e\u4e86\uff0c\u57fa\u672c\u548cJDK\u9759\u6001\u4ee3\u7406\u5dee\u522b\u4e0d\u5927\uff0c \u53ea\u662f\u5c06\u4e00\u5bf9\u4e00\u5b9e\u73b0\u7684\u9759\u6001\u4ee3\u7406\u7c7b\u66ff\u6362\u6210\u4e86<code>InvocationHandler<\/code>\u3002<\/p>\n\n\n\n<p>\u5176\u6b21\uff0cJDK\u52a8\u6001\u4ee3\u7406\u5728\u8fd0\u884c\u671f\u95f4\u8fd8\u53ef\u4ee5\u5c06\u52a8\u6001\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u5b57\u8282\u7801\u4fdd\u5b58\u5230\u672c\u5730\uff0c \u8fd9\u6837\u6211\u4eec\u5c31\u53ef\u4ee5\u67e5\u770b\u52a8\u6001\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u6e90\u7801\u3002\u4fdd\u5b58\u7684\u65b9\u5f0f\u67092\u79cd\uff1a<\/p>\n\n\n\n<p><strong>1.\u8bbe\u7f6eJVM\u7cfb\u7edf\u53d8\u91cf<code>jdk.proxy.ProxyGenerator.saveGeneratedFiles<\/code>\u4e3a<code>true<\/code>:<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">System.getProperties().put(\"jdk.proxy.ProxyGenerator.saveGeneratedFiles\", \"true\");<\/pre>\n\n\n\n<p>\u4e0a\u9762\u662fJDK11\u7684\u8bbe\u7f6e\u65b9\u5f0f\uff0c JDK8\u7684\u8bbe\u7f6e\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">System.getProperties().put(\"sun.misc.ProxyGenerator.saveGeneratedFiles\", \"true\");<\/pre>\n\n\n\n<p>\u4e3b\u51fd\u6570\u4e2d\u6dfb\u52a0\u4e00\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">System.getProperties().put(\"sun.misc.ProxyGenerator.saveGeneratedFiles\", \"true\");<\/pre>\n\n\n\n<p>\u73b0\u5728\u4e3b\u51fd\u6570\u957f\u8fd9\u4e2a\u6837\u5b50\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public static void main(String[] args) {\n    \/\/\u8fd9\u53e5\u8981\u653e\u5728\u751f\u6210\u4ee3\u7406\u5bf9\u8c61\u4e4b\u524d\uff0c\u76ee\u7684\u662f\u4e3a\u4e86\u751f\u6210$Proxy0.class\u6587\u4ef6\n    System.getProperties().put(\"sun.misc.ProxyGenerator.saveGeneratedFiles\", \"true\");\n    \/\/\u8981\u88ab\u4ee3\u7406\u7684\u5bf9\u8c61(\u76ee\u6807\u5bf9\u8c61)\n    Inter target = new InterImpl();\n    \/\/\u4f20\u5165\u76ee\u6807\u5bf9\u8c61\uff0c\u751f\u6210\u4ee3\u7406\u5bf9\u8c61\n    Inter instance = (Inter) new ProxyFactory(target).getProxyInstance();\n    System.out.println(instance.getClass());\n    instance.test();\n}\n<\/pre>\n\n\n\n<p>\u6267\u884c\u4e4b\u540e\uff0c\u5728\u9879\u76ee\u4e0b\u591a\u4e86com\u6587\u4ef6\u5939\uff0c\u5728<code>com\\sun\\proxy<\/code>\u4e0b\u751f\u6210\u4e86<code>$Proxy0.class<\/code>\u6587\u4ef6\uff0c\u7528idea\u6253\u5f00\u5373\u53ef\u81ea\u52a8\u53cd\u7f16\u8bd1\u3002\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u5b57\u8282\u7801\u4fdd\u5b58\u5728<code>workplace\/project\/com\/sun\/proxy<\/code>\u76ee\u5f55\u4e0b\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235-1024x242.png\" alt=\"\" class=\"wp-image-6615\" width=\"614\" height=\"144\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235-1024x242.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235-300x71.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235-768x181.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235-830x196.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235-230x54.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235-350x83.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235-480x113.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-235.png 1406w\" sizes=\"(max-width: 614px) 100vw, 614px\" \/><\/figure><\/div>\n\n\n\n<p><strong>2.\u8c03\u7528<code>java.lang.reflect.ProxyGenerator<\/code> \u7684<code>generatedProxyClass<\/code>\u65b9\u6cd5\u751f\u6210\u5b57\u8282\u7801\u5e76\u5199\u5165\u672c\u5730\uff08JDK11\u4e2d\u8be5\u7c7b\u5df2\u7ecf\u53d8\u6210\u5305\u7c7b\u53ef\u89c1\uff0c \u4e0d\u80fd\u5916\u90e8\u4f7f\u7528\uff09\u3002<\/strong><\/p>\n\n\n\n<p>JDK\u52a8\u6001\u4ee3\u7406\u751f\u6210\u7684class\u5b57\u8282\u7801\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/\n\/\/ Source code recreated from a .class file by IntelliJ IDEA\n\/\/ (powered by Fernflower decompiler)\n\/\/\n\npackage com.sun.proxy;\n\nimport java.lang.reflect.InvocationHandler;\nimport java.lang.reflect.Method;\nimport java.lang.reflect.Proxy;\nimport java.lang.reflect.UndeclaredThrowableException;\nimport org.good.proxy.IRent;\n\npublic final class $Proxy0 extends Proxy implements IRent {\n    private static Method m1;\n    private static Method m2;\n    private static Method m3;\n    private static Method m0;\n\n    public $Proxy0(InvocationHandler var1) throws  {\n        super(var1);\n    }\n\n    public final boolean equals(Object var1) throws  {\n        try {\n            return (Boolean)super.h.invoke(this, m1, new Object[]{var1});\n        } catch (RuntimeException | Error var3) {\n            throw var3;\n        } catch (Throwable var4) {\n            throw new UndeclaredThrowableException(var4);\n        }\n    }\n\n    public final String toString() throws  {\n        try {\n            return (String)super.h.invoke(this, m2, (Object[])null);\n        } catch (RuntimeException | Error var2) {\n            throw var2;\n        } catch (Throwable var3) {\n            throw new UndeclaredThrowableException(var3);\n        }\n    }\n\n    public final void Rent() throws  {\n        try {\n            super.h.invoke(this, m3, (Object[])null);\n        } catch (RuntimeException | Error var2) {\n            throw var2;\n        } catch (Throwable var3) {\n            throw new UndeclaredThrowableException(var3);\n        }\n    }\n\n    public final int hashCode() throws  {\n        try {\n            return (Integer)super.h.invoke(this, m0, (Object[])null);\n        } catch (RuntimeException | Error var2) {\n            throw var2;\n        } catch (Throwable var3) {\n            throw new UndeclaredThrowableException(var3);\n        }\n    }\n\n    static {\n        try {\n            m1 = Class.forName(\"java.lang.Object\").getMethod(\"equals\", Class.forName(\"java.lang.Object\"));\n            m2 = Class.forName(\"java.lang.Object\").getMethod(\"toString\");\n            m3 = Class.forName(\"org.good.proxy.IRent\").getMethod(\"Rent\");\n            m0 = Class.forName(\"java.lang.Object\").getMethod(\"hashCode\");\n        } catch (NoSuchMethodException var2) {\n            throw new NoSuchMethodError(var2.getMessage());\n        } catch (ClassNotFoundException var3) {\n            throw new NoClassDefFoundError(var3.getMessage());\n        }\n    }\n}<\/pre>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u547d\u540d\u4e3a<code>$ProxyNumber<\/code>\uff0c \u662f\u56e0\u4e3a<code>Proxy<\/code>\u7c7b\u4e2d\u7ef4\u62a4\u4e86\u4e00\u4e2a\u5168\u5c40\u7684<code>AtomicLong<\/code>(JDK8)\u8ba1\u6570\u5668\u3002\u8be5<code>$Proxy0<\/code>\u4ee3\u7406\u7c7b\u7ee7\u627f\u4e86<code>java.lang.reflect.Proxy<\/code>\u7c7b\u5e76\u4e14\u5b9e\u73b0\u4e86\u88ab\u4ee3\u7406\u7c7b\u7684\u63a5\u53e3\uff0c \u8fd9\u4e5f\u662fJDK\u52a8\u6001\u4ee3\u7406\u4e3a\u4ec0\u4e48\u53ea\u652f\u6301\u63a5\u53e3\u4ee3\u7406\u7684\u4e00\u4e2a\u539f\u56e0\uff0c \u56e0\u4e3aJava\u4e0d\u652f\u6301\u591a\u7ee7\u627f\u3002<\/p>\n\n\n\n<p>\u540c\u65f6\u53ef\u4ee5\u770b\u5230<code>$Proxy0<\/code>\u4ee3\u7406\u7c7b\u4e2d\uff0c \u5c06<code>InvocationHandler<\/code>\u5b9e\u4f8b\u4f5c\u4e3a\u552f\u4e00\u7684\u6784\u9020\u5668\u53c2\u6570\u8f93\u5165\uff0c \u5728\u6bcf\u4e2a\u65b9\u6cd5\u7684\u5177\u4f53\u5b9e\u73b0\u4e2d\u90fd\u662f\u8c03\u7528<code>InvocationHandler<\/code>\u7684<code>invoke<\/code>\u65b9\u6cd5\u6765\u8c03\u7528\u5177\u4f53\u7684\u4e1a\u52a1\u65b9\u6cd5\u8fdb\u884c\u8bf7\u6c42\u4ee3\u7406\u3002\u800c<code>InvocationHandler<\/code>\u7684<code>invoke<\/code>\u65b9\u6cd5\u5b9e\u9645\u662f\u901a\u8fc7\u53cd\u5c04\u6765\u5b9e\u73b0\u7684\uff0c \u5b83\u7684\u8f93\u5165\u53c2\u6570\u5206\u522b\u662f\u52a8\u6001\u4ee3\u7406\u7c7b\u81ea\u8eab\u3001\u88ab\u4ee3\u7406\u7684\u65b9\u6cd5\u3001\u65b9\u6cd5\u53c2\u6570\uff0c \u8fd4\u56de\u7c7b\u578b\u548c\u4e1a\u52a1\u63a5\u53e3\u7684\u8fd4\u56de\u7c7b\u578b\u4e00\u81f4\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    public final void Rent() throws  {\n        try {\n            \/\/ \u5176\u4e2d\u6267\u884c\u65b9\u6cd5\u7684\u8bed\u53e5\u4e3a\uff1a\n            super.h.invoke(this, m3, (Object[])null);\n        } catch (RuntimeException | Error var2) {\n            throw var2;\n        } catch (Throwable var3) {\n            throw new UndeclaredThrowableException(var3);\n        }\n    }\n<\/pre>\n\n\n\n<p><code>$Proxy0<\/code>\u7c7b\u7ee7\u627f\u4e86<code>Proxy<\/code>\uff0c\u5b9e\u73b0\u4e86\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u63a5\u53e3<code>Inter<\/code>\uff0c\u5176\u4e2d<code>super.h<\/code>\u5373<code>Proxy<\/code>\u7684<code>h<\/code>\uff0c\u5373<code>InvocationHandler<\/code>\u3002<\/p>\n\n\n\n<p>\u5176\u4e2d<code>h<\/code>\u6b63\u662f\u6211\u4eec\u8c03\u7528<code>newProxyInstance<\/code>\u51fd\u6570\u65f6\u4f20\u5165\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"> @Override\n    public Object invoke(Object o, Method method, Object[] objects) throws Throwable {\n        before(); \/\/ \u4e8b\u524d\u6267\u884c\u65b9\u6cd5\uff0c \u6bd4\u5982\u6253\u5370\u65e5\u5fd7\uff0c \u53c2\u6570\u6821\u9a8c\n        Object result =  method.invoke(target, objects);\n        after(); \/\/ \u4e8b\u540e\u6267\u884c\u65b9\u6cd5\uff0c \u6bd4\u5982\u5b89\u5168\u68c0\u67e5\n        return result; \/\/ \u8fd4\u56de\u6267\u884c\u7ed3\u679c\n    }\n<\/pre>\n\n\n\n<p>\u5176\u6b21\uff0c\u751f\u6210\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\u5305\u542b\u591a\u4e2a<code>java.lang.reflect.Method<\/code>\u5bf9\u8c61\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">  private static Method m1;\n  private static Method m2;\n  private static Method m3;\n  private static Method m0;\n<\/pre>\n\n\n\n<p>\u8fd9\u4e9b<code>Method<\/code>\u5bf9\u8c61\u4e2d\uff0c\u9664\u8fc7\u5305\u542b\u4e1a\u52a1\u63a5\u53e3\u5b9a\u4e49\u7684\u4e1a\u52a1\u65b9\u6cd5\uff0c \u8fd8\u5305\u542b\u4e86\u4e09\u4e2a\u91cd\u8981\u65b9\u6cd5\uff0c \u5206\u522b\u662f<code>java.lang.Object<\/code>\u7684<code>equals()<\/code>\u3001<code>hashCode()<\/code>\u3001<code>toString()<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238-1024x545.png\" alt=\"\" class=\"wp-image-6619\" width=\"624\" height=\"332\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238-1024x545.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238-300x160.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238-768x409.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238-830x442.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238-230x122.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238-350x186.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238-480x255.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-238.png 1398w\" sizes=\"(max-width: 624px) 100vw, 624px\" \/><\/figure><\/div>\n\n\n\n<p>\u603b\u7ed3\u800c\u8a00\uff0cJDK\u52a8\u6001\u4ee3\u7406\u7684\u7279\u70b9\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul><li>\u9700\u8981\u5b9e\u73b0<code>InvocationHandler<\/code>\u63a5\u53e3\uff0c \u5e76\u91cd\u5199<code>invoke<\/code>\u65b9\u6cd5\u3002<\/li><li>\u88ab\u4ee3\u7406\u7c7b\u9700\u8981\u5b9e\u73b0\u63a5\u53e3\uff0c \u5b83\u4e0d\u652f\u6301\u7ee7\u627f\u3002<\/li><li>JDK \u52a8\u6001\u4ee3\u7406\u7c7b\u4e0d\u9700\u8981\u4e8b\u5148\u5b9a\u4e49\u597d\uff0c \u800c\u662f\u5728\u8fd0\u884c\u671f\u95f4\u52a8\u6001\u751f\u6210\u3002<\/li><li>JDK \u52a8\u6001\u4ee3\u7406\u4e0d\u9700\u8981\u5b9e\u73b0\u548c\u88ab\u4ee3\u7406\u7c7b\u4e00\u6837\u7684\u63a5\u53e3\uff0c \u6240\u4ee5\u53ef\u4ee5\u7ed1\u5b9a\u591a\u4e2a\u88ab\u4ee3\u7406\u7c7b\u3002<\/li><\/ul>\n\n\n\n<p><strong>1.3\u3001\u5b9e\u73b0\u539f\u7406<\/strong><\/p>\n\n\n\n<p>JDK\u52a8\u6001\u4ee3\u7406\u7684\u4e3b\u8981\u5b9e\u73b0\u539f\u7406\u4e3a<code>\u53cd\u5c04<\/code>\uff0c \u5b83\u901a\u8fc7\u53cd\u5c04\u5728\u8fd0\u884c\u671f\u95f4\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b\uff0c \u5e76\u4e14\u901a\u8fc7<code>\u53cd\u5c04<\/code>\u8c03\u7528\u88ab\u4ee3\u7406\u7c7b\u7684\u5b9e\u9645\u4e1a\u52a1\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u4ece<code>java.lang.reflect.Proxy<\/code>\u7684<code>newProxyInstance<\/code>\u65b9\u6cd5\u5165\u624b\u6211\u4eec\u770b\u4e00\u4e0bJDK\u52a8\u6001\u4ee3\u7406\u7684\u5b9e\u73b0\u6e90\u7801\uff08\u4ee5JDK11\u4e3a\u4f8b\uff09\u3002<\/p>\n\n\n\n<p><strong>1.<code>Proxy<\/code> \u7684\u6210\u5458\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class Proxy implements Serializable {\n    private static final long serialVersionUID = -2222568056686623797L;\n    private static final Class&lt;?>[] constructorParams = new Class[]{InvocationHandler.class};\n    private static final ClassLoaderValue&lt;Constructor&lt;?>> proxyCache = new ClassLoaderValue();\n    protected InvocationHandler h;\n    private static final Class&lt;?>[] EMPTY_CLASS_ARRAY = new Class[0];\n    private static final String PROXY_PACKAGE_PREFIX = \"com.sun.proxy\";\n\n    private Proxy() {\n    }\n\n    protected Proxy(InvocationHandler h) {\n        Objects.requireNonNull(h);\n        this.h = h;\n    }\n\n   \/**\n   *\n   *\/\n}\n<\/pre>\n\n\n\n<p><code>Proxy<\/code>\u7c7b\u7684\u4e3b\u8981\u6210\u5458\u53d8\u91cf\u6216\u7c7b\u53d8\u91cf\u4e3a\uff1a<\/p>\n\n\n\n<ul><li><code>Class&lt;?&gt;[] constructorParams<\/code>: \u751f\u6210\u7684\u4ee3\u7406\u7c7b\u7684\u6784\u9020\u5668\u53c2\u6570\uff0c \u53ea\u6709\u4e00\u4e2a<code>InvocationHandler<\/code>\uff0c \u4ece\u751f\u6210\u7684<code>$Proxy0<\/code> \u5b57\u8282\u7801\u53ef\u4ee5\u770b\u5230\uff0c \u52a8\u6001\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u7684\u6784\u9020\u5668\u786e\u5b9e\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u5c31\u662f<code>InvocationHandler<\/code>\u3002 <\/li><li><code>ClassLoaderValue&lt;Constructor&lt;?&gt;&gt; proxyCache<\/code>: <code>Proxy<\/code>\u7c7b\u7684\u672c\u5730\u7f13\u5b58\uff0cKey\u5b58\u50a8\u7684\u662f\u88ab\u4ee3\u7406\u7c7b\u63a5\u53e3\u7684\u96c6\u5408\uff0c Value\u5b58\u7684\u662f\u751f\u6210\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u6784\u9020\u5668\u5b9e\u4f8b\u3002 <\/li><li><code>InvocationHandler h<\/code>: <code>Proxy<\/code>\u7c7b\u7684\u552f\u4e00\u6210\u5458\u53d8\u91cf\uff0c \u4f5c\u4e3a\u6784\u9020\u5668\u7684\u53c2\u6570\u4f20\u5165\uff0c \u4e0d\u5141\u8bb8\u4e3a\u7a7a\u3002<\/li><\/ul>\n\n\n\n<p><code>Proxy<\/code>\u7c7b\u7684\u6784\u9020\u51fd\u6570\u53ea\u6709\u4e00\u4e2a<code>InvocationHandler<\/code>\uff0c\u56e0\u4e3a\u751f\u6210\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\u4f1a\u7ee7\u627f<code>Proxy<\/code>\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">   protected Proxy(InvocationHandler h) {\n        Objects.requireNonNull(h);\n        this.h = h;\n    }\n<\/pre>\n\n\n\n<p><strong>2.<code>Proxy.newProxyInstance()<\/code>\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    @CallerSensitive\n    public static Object newProxyInstance(ClassLoader loader, Class&lt;?>[] interfaces, InvocationHandler h) {\n        Objects.requireNonNull(h);\n        Class&lt;?> caller = System.getSecurityManager() == null ? null : Reflection.getCallerClass();\n        Constructor&lt;?> cons = getProxyConstructor(caller, loader, interfaces);\n        return newProxyInstance(caller, cons, h);\n    }\n<\/pre>\n\n\n\n<p><code>newProxyInstance<\/code>\u65b9\u6cd5\u7684\u53c2\u6570\u4e3a\uff1a<\/p>\n\n\n\n<ul><li><code>ClassLoader<\/code>\uff1a \u88ab\u4ee3\u7406\u7c7b\u7684\u7c7b\u52a0\u8f7d\u5668\uff0c\u7528\u6765\u5224\u65ad\u8bbf\u95ee\u6743\u9650\u4ee5\u53ca\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u7684\u5305\u8def\u5f84\u3002<\/li><li><code>Class&lt;?&gt; interfaces<\/code>: \u88ab\u4ee3\u7406\u7c7b\u5b9e\u73b0\u7684\u63a5\u53e3\u96c6\u5408\uff0c \u7528\u6765\u751f\u6210\u4ee3\u7406\u7c7b\u4e2d\u7684\u4e1a\u52a1\u65b9\u6cd5\u3002<\/li><li><code>InvocationHandler<\/code>: \u4ee3\u7406\u4e1a\u52a1\u903b\u8f91\u7684\u5904\u7406handler, \u7528\u6765\u4f5c\u4e3a<code>Proxy<\/code>\u7684\u6784\u9020\u5668\u53c2\u6570\u5e76\u4f20\u9012\u7ed9\u4ee3\u7406\u7c7b\u3002<\/li><\/ul>\n\n\n\n<p><code>newProxyInstance<\/code>\u65b9\u6cd5\u7684\u903b\u8f91\u6bd4\u8f83\u7b80\u5355\uff1a<\/p>\n\n\n\n<ul><li>\u83b7\u53d6\u4ee3\u7406\u7c7b\u7684\u6784\u9020\u5668\u5b9e\u4f8b<code>Constructor<\/code>.<\/li><li>\u5229\u7528\u6784\u9020\u5668\u5b9e\u4f8b\u548c<code>InvocationHandler<\/code>\u7684\u5b9e\u4f8b\u751f\u6210\u4ee3\u7406\u7c7b\u5b9e\u4f8b.<br><\/li><\/ul>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f\u5fc5\u987b\u5b9e\u73b0<code>InvocationHandler<\/code>\uff0c \u800c\u4e0d\u80fd\u4f20\u7a7a\u3002<\/p>\n\n\n\n<p><strong>3.<code>Proxy.getProxyConstructor<\/code>\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"> private static Constructor&lt;?> getProxyConstructor(Class&lt;?> caller, ClassLoader loader, Class&lt;?>... interfaces) {\n        if (interfaces.length == 1) {\n            Class&lt;?> intf = interfaces[0];\n            if (caller != null) {\n                checkProxyAccess(caller, loader, intf);\n            }\n\n            return (Constructor)proxyCache.sub(intf).computeIfAbsent(loader, (ld, clv) -> {\n                return (new Proxy.ProxyBuilder(ld, (Class)clv.key())).build();\n            });\n        } else {\n            Class&lt;?>[] intfsArray = (Class[])interfaces.clone();\n            if (caller != null) {\n                checkProxyAccess(caller, loader, intfsArray);\n            }\n\n            List&lt;Class&lt;?>> intfs = Arrays.asList(intfsArray);\n            return (Constructor)proxyCache.sub(intfs).computeIfAbsent(loader, (ld, clv) -> {\n                return (new Proxy.ProxyBuilder(ld, (List)clv.key())).build();\n            });\n        }\n    }\n<\/pre>\n\n\n\n<p>\u8be5\u65b9\u6cd5\u4e3b\u8981\u505a\u4e86\u4e24\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n<ul><li>\u4ece<code>proxyCache<\/code>\u4e2d\u83b7\u53d6\u88ab\u4ee3\u7406\u7c7b\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\u6784\u9020\u5668\uff0c \u952e\u503c\u662f\u7531\u88ab\u4ee3\u7406\u7c7b\u5b9e\u73b0\u7684\u63a5\u53e3\u96c6\u5408\u751f\u6210\u7684<code>AbstractClassLoaderValue.SubK<\/code>\u5b9e\u4f8b\u3002 <\/li><li>\u5982\u679c\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u4e0d\u5230\uff0c \u5219\u901a\u8fc7<code>Proxy.ProxyBuilder<\/code>\u52a8\u6001\u521b\u5efa\u52a8\u6001\u4ee3\u7406\u7c7b\u7684class\u5b57\u8282\u7801\u5e76\u751f\u6210\u6784\u9020\u5668\u3002<\/li><\/ul>\n\n\n\n<p><strong>4.<code>Proxy.ProxyBuilder<\/code>\u7c7b\u6210\u5458\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">  private static final class ProxyBuilder {\n        private static final Unsafe UNSAFE = Unsafe.getUnsafe();\n        private static final String proxyClassNamePrefix = \"$Proxy\";\n        private static final AtomicLong nextUniqueNumber = new AtomicLong();\n        private static final ClassLoaderValue&lt;Boolean> reverseProxyCache = new ClassLoaderValue();\n        private static final String DEBUG = GetPropertyAction.privilegedGetProperty(\"jdk.proxy.debug\", \"\");\n        private final List&lt;Class&lt;?>> interfaces;\n        private final Module module;\n        private static final ClassLoaderValue&lt;Module> dynProxyModules = new ClassLoaderValue();\n        private static final AtomicInteger counter = new AtomicInteger();\n\n        ProxyBuilder(ClassLoader loader, List&lt;Class&lt;?>> interfaces) {\n            if (!VM.isModuleSystemInited()) {\n                throw new InternalError(\"Proxy is not supported until module system is fully initialized\");\n            } else if (interfaces.size() > 65535) {\n                throw new IllegalArgumentException(\"interface limit exceeded: \" + interfaces.size());\n            } else {\n                Set&lt;Class&lt;?>> refTypes = referencedTypes(loader, interfaces);\n                validateProxyInterfaces(loader, interfaces, refTypes);\n                this.interfaces = interfaces;\n                this.module = mapToModule(loader, interfaces, refTypes);\n\n                assert Proxy.getLoader(this.module) == loader;\n\n            }\n          }\n\n          ProxyBuilder(ClassLoader loader, Class&lt;?> intf) {\n            this(loader, Collections.singletonList(intf));\n          }\n\n}\n<\/pre>\n\n\n\n<p>\u6bd4\u8f83\u91cd\u8981\u7684\u6210\u5458\u53d8\u91cf\uff1a<\/p>\n\n\n\n<ul><li><code>proxyClassNamePrefix<\/code>: \u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\u7c7b\u540d\u7684\u524d\u7f00\u3002<\/li><li><code>nextUniqueNumvber<\/code>: \u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\u7c7b\u540d\u7684\u540e\u7f00\u3002<br>\u6bd4\u5982<code>$Proxy0<\/code>\u3001<code>$Proxy1<\/code>, \u6839\u636e\u8fd0\u884c\u65f6<code>Proxy<\/code>\u52a8\u6001\u521b\u5efa\u7684\u4ee3\u7406\u7c7b\u6570\u91cf\u51b3\u5b9a\u3002<\/li><li><code>ClassLoader<\/code>: \u7c7b\u52a0\u8f7d\u5668\uff0c \u7528\u6765\u5224\u65ad\u5305\u8def\u5f84\u548c\u8bbf\u95ee\u6743\u9650\uff0c \u4f5c\u4e3a\u6784\u9020\u5668\u53c2\u6570\u4f20\u5165\u3002<\/li><li><code>List&lt;Class&lt;?&gt;&gt; interfaces<\/code>: \u88ab\u4ee3\u7406\u7c7b\u7684\u63a5\u53e3\u96c6\u5408\uff0c\u4f5c\u4e3a\u6784\u9020\u5668\u53c2\u6570\u4f20\u5165\u3002<\/li><\/ul>\n\n\n\n<p><strong>5. <code>Proxy.ProxyBuilder.build<\/code>\u65b9\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    Constructor&lt;?> build() {\n            Class proxyClass = defineProxyClass(this.module, this.interfaces);\n\n            final Constructor cons;\n            try {\n                cons = proxyClass.getConstructor(Proxy.constructorParams);\n            } catch (NoSuchMethodException var4) {\n                throw new InternalError(var4.toString(), var4);\n            }\n\n            AccessController.doPrivileged(new PrivilegedAction&lt;Void>() {\n                public Void run() {\n                    cons.setAccessible(true);\n                    return null;\n                }\n            });\n            return cons;\n        }\n<\/pre>\n\n\n\n<p><code>build<\/code>\u65b9\u6cd5\u4e3b\u8981\u505a2\u4ef6\u4e8b\u60c5\uff1a<\/p>\n\n\n\n<ul><li>\u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\u7684class\u5b57\u8282\u7801\u3002<\/li><li>\u6839\u636eclass\u5b57\u8282\u7801\u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u6784\u9020\u5668\u5b9e\u4f8b\u3002<\/li><\/ul>\n\n\n\n<p><strong>6.<code>Proxy.ProxyBuilder.defineProxyClass<\/code>\u65b9\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">private static Class&lt;?> defineProxyClass(Module m, List&lt;Class&lt;?>> interfaces) {\n           String proxyPkg = null;\n           int accessFlags = 17;\n           Iterator var4 = interfaces.iterator();\n\n           while(var4.hasNext()) {\n               Class&lt;?> intf = (Class)var4.next();\n               int flags = intf.getModifiers();\n               if (!Modifier.isPublic(flags)) {\n                   accessFlags = 16;\n                   String pkg = intf.getPackageName();\n                   if (proxyPkg == null) {\n                       proxyPkg = pkg;\n                   } else if (!pkg.equals(proxyPkg)) {\n                       throw new IllegalArgumentException(\"non-public interfaces from different packages\");\n                   }\n               }\n           }\n\n           if (proxyPkg == null) {\n               proxyPkg = m.isNamed() ? \"com.sun.proxy.\" + m.getName() : \"com.sun.proxy\";\n           } else if (proxyPkg.isEmpty() &amp;&amp; m.isNamed()) {\n               throw new IllegalArgumentException(\"Unnamed package cannot be added to \" + m);\n           }\n\n           if (m.isNamed() &amp;&amp; !m.getDescriptor().packages().contains(proxyPkg)) {\n               throw new InternalError(proxyPkg + \" not exist in \" + m.getName());\n           } else {\n               long num = nextUniqueNumber.getAndIncrement();\n               String proxyName = proxyPkg.isEmpty() ? \"$Proxy\" + num : proxyPkg + \".\" + \"$Proxy\" + num;\n               ClassLoader loader = Proxy.getLoader(m);\n               trace(proxyName, m, loader, interfaces);\n               byte[] proxyClassFile = ProxyGenerator.generateProxyClass(proxyName, (Class[])interfaces.toArray(Proxy.EMPTY_CLASS_ARRAY), accessFlags);\n\n               try {\n                   Class&lt;?> pc = UNSAFE.defineClass(proxyName, proxyClassFile, 0, proxyClassFile.length, loader, (ProtectionDomain)null);\n                   reverseProxyCache.sub(pc).putIfAbsent(loader, Boolean.TRUE);\n                   return pc;\n               } catch (ClassFormatError var10) {\n                   throw new IllegalArgumentException(var10.toString());\n               }\n           }\n       }\n<\/pre>\n\n\n\n<p><code>defineProxyClass<\/code>\u65b9\u6cd5\u7684\u6267\u884c\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul><li>\u751f\u6210\u4ee3\u7406\u7c7b\u5305\u8def\u5f84\uff1a\u5224\u65ad\u88ab\u4ee3\u7406\u7c7b\u5b9e\u73b0\u7684\u63a5\u53e3\u4e2d\uff0c \u662f\u5426\u5b58\u5728\u975e<code>public<\/code>\u4fee\u9970\u7684\u63a5\u53e3\uff0c \u5982\u679c\u6709\u5219\u8bbe\u7f6e\u4ee3\u7406\u7c7b\u7684\u5305\u8def\u5f84\u4e3a\u975e<code>public<\/code>\u63a5\u53e3\u7684\u5305\u8def\u5f84\uff0c \u56e0\u4e3a\u5982\u679c\u662f\u975e<code>public<\/code>\u4fee\u9970\u7684\u53ea\u5141\u8bb8\u5305\u5185\u53ef\u8bbf\u95ee\uff0c \u5e76\u4e14\u5982\u679c\u5b58\u5728\u591a\u4e2a\u975e<code>public<\/code>\u63a5\u53e3\uff0c\u8fd8\u9700\u8981\u5224\u65ad\u5b83\u4eec\u662f\u5426\u4f4d\u4e8e\u540c\u4e00\u4e2a\u5305\u4e0b\u9762\uff0c \u5426\u5219\u4f1a\u51fa\u73b0\u8bbf\u95ee\u6743\u9650\u95ee\u9898\u3002\u5982\u679c\u5305\u8def\u5f84\u4e3a\u7a7a\uff0c\u5219\u8bbe\u7f6e\u5305\u8def\u5f84\u4e3a\u9ed8\u8ba4\u7684<code>com.sun.proxy<\/code>\u3002 <\/li><li>\u751f\u6210\u4ee3\u7406\u7c7b\u7c7b\u540d\uff1a\u6839\u636e<code>nextUniqueNumber<\/code>\u83b7\u53d6\u4e0b\u4e00\u4f4d\u6570\u503c\u5e76\u62fc\u63a5\u7c7b\u540d\u3002<\/li><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">String proxyName = proxyPkg.isEmpty() ? \"$Proxy\" + num : proxyPkg + \".\" + \"$Proxy\" + num;<\/pre>\n\n\n\n<ul><li>\u751f\u6210\u4ee3\u7406\u7c7bclass\u5b57\u8282\u7801\uff1a \u8c03\u7528<code>ProxyGenerator.generateProxyClass<\/code>\u65b9\u6cd5\u751f\u6210\u4ee3\u7406\u7c7b\u7684\u5b57\u8282\u7801<code>byte[] proxyClassFile<\/code>\u3002\u53c2\u6570\u662f\u7c7b\u540d\u548c\u63a5\u53e3Class \u96c6\u5408\u3002<\/li><li>\u751f\u6210\u4ee3\u7406\u7c7b<code>java.lang.Class<\/code>\u5bf9\u8c61\uff1a \u8c03\u7528\u7cfb\u7edf\u65b9\u6cd5\u4f7f\u7528class\u5b57\u8282\u7801\u751f\u6210\u5bf9\u5e94\u7684<code>java.lang.Class<\/code>\u5bf9\u8c61\u3002<\/li><\/ul>\n\n\n\n<p><code>defineProxyClass<\/code>\u65b9\u6cd5\u7684\u8fd4\u56de\u4e3a<code>java.lang.Class<\/code>\uff0c \u662f\u52a8\u6001\u751f\u6210\u7684\u4ee3\u7406\u7c7b<code>Class<\/code>\u5b9e\u4f8b\u3002<\/p>\n\n\n\n<p><strong>7.<code>ProxyGenerator<\/code>\u7c7b\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">class ProxyGenerator {\n    private static final int CLASSFILE_MAJOR_VERSION = 49;\n    private static final int CLASSFILE_MINOR_VERSION = 0;\n    private static final int CONSTANT_UTF8 = 1;\n    private static final int CONSTANT_UNICODE = 2;\n    private static final int CONSTANT_INTEGER = 3;\n    private static final int CONSTANT_FLOAT = 4;\n    private static final int CONSTANT_LONG = 5;\n    private static final int CONSTANT_DOUBLE = 6;\n    private static final int CONSTANT_CLASS = 7;\n    private static final int CONSTANT_STRING = 8;\n    private static final int CONSTANT_FIELD = 9;\n    private static final int CONSTANT_METHOD = 10;\n    private static final int CONSTANT_INTERFACEMETHOD = 11;\n    private static final int CONSTANT_NAMEANDTYPE = 12;\n    private static final int ACC_PUBLIC = 1;\n    private static final int ACC_PRIVATE = 2;\n    private static final int ACC_STATIC = 8;\n    private static final int ACC_FINAL = 16;\n    private static final int ACC_SUPER = 32;\n    private static final int opc_aconst_null = 1;\n    private static final int opc_iconst_0 = 3;\n    private static final int opc_bipush = 16;\n    private static final int opc_sipush = 17;\n    private static final int opc_ldc = 18;\n    private static final int opc_ldc_w = 19;\n    private static final int opc_iload = 21;\n    private static final int opc_lload = 22;\n    private static final int opc_fload = 23;\n    private static final int opc_dload = 24;\n    private static final int opc_aload = 25;\n    private static final int opc_iload_0 = 26;\n    private static final int opc_lload_0 = 30;\n    private static final int opc_fload_0 = 34;\n    private static final int opc_dload_0 = 38;\n    private static final int opc_aload_0 = 42;\n    private static final int opc_astore = 58;\n    private static final int opc_astore_0 = 75;\n    private static final int opc_aastore = 83;\n    private static final int opc_pop = 87;\n    private static final int opc_dup = 89;\n    private static final int opc_ireturn = 172;\n    private static final int opc_lreturn = 173;\n    private static final int opc_freturn = 174;\n    private static final int opc_dreturn = 175;\n    private static final int opc_areturn = 176;\n    private static final int opc_return = 177;\n    private static final int opc_getstatic = 178;\n    private static final int opc_putstatic = 179;\n    private static final int opc_getfield = 180;\n    private static final int opc_invokevirtual = 182;\n    private static final int opc_invokespecial = 183;\n    private static final int opc_invokestatic = 184;\n    private static final int opc_invokeinterface = 185;\n    private static final int opc_new = 187;\n    private static final int opc_anewarray = 189;\n    private static final int opc_athrow = 191;\n    private static final int opc_checkcast = 192;\n    private static final int opc_wide = 196;\n    private static final String superclassName = \"java\/lang\/reflect\/Proxy\";\n    private static final String handlerFieldName = \"h\";\n    private static final boolean saveGeneratedFiles = (Boolean)AccessController.doPrivileged(new GetBooleanAction(\"jdk.proxy.ProxyGenerator.saveGeneratedFiles\"));\n    private static Method hashCodeMethod;\n    private static Method equalsMethod;\n    private static Method toStringMethod;\n    private String className;\n    private Class&lt;?>[] interfaces;\n    private int accessFlags;\n    private ProxyGenerator.ConstantPool cp = new ProxyGenerator.ConstantPool();\n    private List&lt;ProxyGenerator.FieldInfo> fields = new ArrayList();\n    private List&lt;ProxyGenerator.MethodInfo> methods = new ArrayList();\n    private Map&lt;String, List&lt;ProxyGenerator.ProxyMethod>> proxyMethods = new HashMap();\n    private int proxyMethodCount = 0;\n\n    private ProxyGenerator(String className, Class&lt;?>[] interfaces, int accessFlags) {\n        this.className = className;\n        this.interfaces = interfaces;\n        this.accessFlags = accessFlags;\n    }\n\n}\n<\/pre>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230<code>ProxyGenerator<\/code>\u7c7b\u7684\u6210\u5458\u9664\u8fc7\u5305\u542b\u7c7b\u540d<code>className<\/code>\u548c\u7c7b\u7684\u63a5\u53e3\u96c6\u5408<code>interfaces<\/code>\u5916\uff0c \u8fd8\u5305\u542b3\u4e2a<code>Method<\/code>\u5bf9\u8c61\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"> private static Method hashCodeMethod;\n private static Method equalsMethod;\n private static Method toStringMethod;\n<\/pre>\n\n\n\n<p>\u8fd93\u4e2a\u65b9\u6cd5\u662f\u591a\u6709JDK \u52a8\u6001\u4ee3\u7406\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u90fd\u4f1a\u5305\u542b\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p><strong>8.<code>ProxyGenerator.generateProxyClass<\/code>\u65b9\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"> static byte[] generateProxyClass(final String name, Class&lt;?>[] interfaces, int accessFlags) {\n        ProxyGenerator gen = new ProxyGenerator(name, interfaces, accessFlags);\n        final byte[] classFile = gen.generateClassFile();\n        if (saveGeneratedFiles) {\n            AccessController.doPrivileged(new PrivilegedAction&lt;Void>() {\n                public Void run() {\n                    try {\n                        int i = name.lastIndexOf(46);\n                        Path path;\n                        if (i > 0) {\n                            Path dir = Path.of(name.substring(0, i).replace('.', File.separatorChar));\n                            Files.createDirectories(dir);\n                            path = dir.resolve(name.substring(i + 1, name.length()) + \".class\");\n                        } else {\n                            path = Path.of(name + \".class\");\n                        }\n\n                        Files.write(path, classFile, new OpenOption[0]);\n                        return null;\n                    } catch (IOException var4) {\n                        throw new InternalError(\"I\/O exception saving generated file: \" + var4);\n                    }\n                }\n            });\n        }\n\n        return classFile;\n    }\n\n<\/pre>\n\n\n\n<p>\u8be5\u65b9\u6cd5\u4e3b\u8981\u505a2\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n<ul><li>\u8c03\u7528<code>generateClassFile<\/code>\u65b9\u6cd5\u751f\u6210class\u5b57\u8282\u7801\u3002<\/li><li>\u5224\u65ad\u662f\u5426\u9700\u8981\u5c06class\u5b57\u8282\u7801\u5199\u5165\u78c1\u76d8\u3002<\/li><\/ul>\n\n\n\n<p><strong>9.<code>ProxyGenerator.generateClassFile<\/code>\u65b9\u6cd5\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">  private byte[] generateClassFile() {\n        this.addProxyMethod(hashCodeMethod, Object.class);\n        this.addProxyMethod(equalsMethod, Object.class);\n        this.addProxyMethod(toStringMethod, Object.class);\n        Class[] var1 = this.interfaces;\n        int var2 = var1.length;\n\n        int var3;\n        Class intf;\n        for(var3 = 0; var3 &lt; var2; ++var3) {\n            intf = var1[var3];\n            Method[] var5 = intf.getMethods();\n            int var6 = var5.length;\n\n            for(int var7 = 0; var7 &lt; var6; ++var7) {\n                Method m = var5[var7];\n                if (!Modifier.isStatic(m.getModifiers())) {\n                    this.addProxyMethod(m, intf);\n                }\n            }\n        }\n\n        Iterator var11 = this.proxyMethods.values().iterator();\n\n        List sigmethods;\n        while(var11.hasNext()) {\n            sigmethods = (List)var11.next();\n            checkReturnTypes(sigmethods);\n        }\n\n        Iterator var15;\n        try {\n            this.methods.add(this.generateConstructor());\n            var11 = this.proxyMethods.values().iterator();\n\n            while(var11.hasNext()) {\n                sigmethods = (List)var11.next();\n                var15 = sigmethods.iterator();\n\n                while(var15.hasNext()) {\n                    ProxyGenerator.ProxyMethod pm = (ProxyGenerator.ProxyMethod)var15.next();\n                    this.fields.add(new ProxyGenerator.FieldInfo(pm.methodFieldName, \"Ljava\/lang\/reflect\/Method;\", 10));\n                    this.methods.add(pm.generateMethod());\n                }\n            }\n\n            this.methods.add(this.generateStaticInitializer());\n        } catch (IOException var10) {\n            throw new InternalError(\"unexpected I\/O Exception\", var10);\n        }\n\n        if (this.methods.size() > 65535) {\n            throw new IllegalArgumentException(\"method limit exceeded\");\n        } else if (this.fields.size() > 65535) {\n            throw new IllegalArgumentException(\"field limit exceeded\");\n        } else {\n            this.cp.getClass(dotToSlash(this.className));\n            this.cp.getClass(\"java\/lang\/reflect\/Proxy\");\n            var1 = this.interfaces;\n            var2 = var1.length;\n\n            for(var3 = 0; var3 &lt; var2; ++var3) {\n                intf = var1[var3];\n                this.cp.getClass(dotToSlash(intf.getName()));\n            }\n\n            this.cp.setReadOnly();\n            ByteArrayOutputStream bout = new ByteArrayOutputStream();\n            DataOutputStream dout = new DataOutputStream(bout);\n\n            try {\n                dout.writeInt(-889275714);\n                dout.writeShort(0);\n                dout.writeShort(49);\n                this.cp.write(dout);\n                dout.writeShort(this.accessFlags);\n                dout.writeShort(this.cp.getClass(dotToSlash(this.className)));\n                dout.writeShort(this.cp.getClass(\"java\/lang\/reflect\/Proxy\"));\n                dout.writeShort(this.interfaces.length);\n                Class[] var17 = this.interfaces;\n                int var18 = var17.length;\n\n                for(int var19 = 0; var19 &lt; var18; ++var19) {\n                    Class&lt;?> intf = var17[var19];\n                    dout.writeShort(this.cp.getClass(dotToSlash(intf.getName())));\n                }\n\n                dout.writeShort(this.fields.size());\n                var15 = this.fields.iterator();\n\n                while(var15.hasNext()) {\n                    ProxyGenerator.FieldInfo f = (ProxyGenerator.FieldInfo)var15.next();\n                    f.write(dout);\n                }\n\n                dout.writeShort(this.methods.size());\n                var15 = this.methods.iterator();\n\n                while(var15.hasNext()) {\n                    ProxyGenerator.MethodInfo m = (ProxyGenerator.MethodInfo)var15.next();\n                    m.write(dout);\n                }\n\n                dout.writeShort(0);\n                return bout.toByteArray();\n            } catch (IOException var9) {\n                throw new InternalError(\"unexpected I\/O Exception\", var9);\n            }\n        }\n    }\n<\/pre>\n\n\n\n<p>\u8be5\u65b9\u6cd5\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u6309\u7167class\u5b57\u8282\u7801\u7684\u7ec4\u7ec7\u7ed3\u6784\u6784\u5efaclass\u5b57\u8282\u6d41\uff0c\u6bd4\u8f83\u590d\u6742\u4e13\u4e1a\uff0c \u7ffb\u770b\u6e90\u7801\u5927\u81f4\u6d41\u7a0b\u4e3a\uff1a<\/p>\n\n\n\n<ul><li>\u6784\u9020<code>Method<\/code>\u6210\u5458\uff0c \u8fd9\u91cc\u5305\u542b\u4e86<code>hashCode<\/code>\u3001<code>equals<\/code>\u3001<code>toString<\/code>3\u4e2a\u65b9\u6cd5\u7b49\u3002 <\/li><li>\u6784\u9020<code>Field<\/code>\u6210\u5458\u3002 <\/li><li>\u6784\u9020\u5b57\u8282\u7801\u8f93\u51fa\u6d41<code>DataOutputStream<\/code>\u3002<\/li><li> \u5411<code>stream<\/code>\u4e2d\u5148\u540e\u5199\u5165\u9b54\u6570\u3001\u4ee3\u7406\u7c7b\u8bbf\u95ee\u63a7\u5236\u7b26\u3001\u4ee3\u7406\u7c7b\u3001<code>java.lang.Proxy<\/code>\u3001\u63a5\u53e3\u3001\u6210\u5458\u53d8\u91cf\u3001\u65b9\u6cd5\u53d8\u91cf\u7b49\u7b49\u3002<\/li><\/ul>\n\n\n\n<p><strong>10.<code>InvocationHandler<\/code>\u63a5\u53e3\uff1a<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public interface InvocationHandler {\n    Object invoke(Object var1, Method var2, Object[] var3) throws Throwable;\n}\n\n<\/pre>\n\n\n\n<p><code>InvocationHandler<\/code> \u63a5\u53e3\u6bd4\u8f83\u7b80\u5355\uff0c \u53ea\u8981\u4e00\u4e2a\u65b9\u6cd5<code>invoke<\/code>\uff0c\u7531\u4e1a\u52a1\u65b9\u81ea\u884c\u5b9e\u73b0\u4e1a\u52a1\u903b\u8f91\u3002\u5b9e\u73b0\u7684\u65b9\u5f0f\u662f\u901a\u8fc7<code>Method<\/code>\u53cd\u5c04\u6765\u5b9e\u73b0\u771f\u5b9e\u7684\u4e1a\u52a1\u65b9\u6cd5\u8c03\u7528\u3002<\/p>\n\n\n\n<p>\u7efc\u4e0a\u53ef\u4ee5\u770b\u5230\uff0c<code>Proxy<\/code>\u7c7b\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b <code>Class<\/code>\u5b9e\u4f8b\uff0c\u771f\u5b9e\u7684\u4e1a\u52a1\u4ee3\u7801\u6ce8\u5165\u90fd\u5728<code>InvocationHandler<\/code>\u4e2d\u5b9e\u73b0\uff0c \u4e1a\u52a1\u65b9\u9700\u8981\u91cd\u5199<code>invoke<\/code>\u65b9\u6cd5\u5b8c\u6210\u771f\u6b63\u7684\u4e1a\u52a1\u8c03\u7528\uff0c\u5e76\u5b9e\u73b0\u529f\u80fd\u589e\u5f3a\u3002JDK\u603b\u53f0\u4ee3\u7406\u4e3b\u8981\u662f\u901a\u8fc7<code>\u53cd\u5c04<\/code>\u7684\u65b9\u5f0f\u6765\u52a8\u6001\u751f\u6210\u5b57\u8282\u7801\u4ece\u800c\u5b9e\u73b0\u52a8\u6001\u4ee3\u7406\u3002<\/p>\n\n\n\n<p><strong>1.4\u3001\u5b58\u5728\u7684\u95ee\u9898<\/strong><\/p>\n\n\n\n<p>JDK\u52a8\u6001\u4ee3\u7406\u867d\u7136\u5b9e\u73b0\u5f88\u7b80\u5355\uff0c \u4f46\u662f\u8981\u6c42\u88ab\u4ee3\u7406\u7c7b\u5fc5\u987b\u5b9e\u73b0\u65b9\u6cd5\uff0c \u800c\u4e0d\u652f\u6301\u7ee7\u627f\uff0c\u56e0\u4e3a\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u5df2\u7ecf\u7ee7\u627f\u4e86<code>java.lang.reflect.Proxy<\/code>\u7c7b\uff0c Java\u4e0d\u652f\u6301\u591a\u7ee7\u627f\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u6211\u4eec\u5b9a\u4e49\u4e00\u4e2a\u88ab\u4ee3\u7406\u7c7b\uff0c\u8be5\u7c7b\u4e0d\u5b9e\u73b0\u4efb\u4f55\u63a5\u53e3\u4f1a\u600e\u6837\uff1f\u4e0b\u9762\u6211\u4eec\u505a\u4e00\u4e2a\u5b9e\u9a8c\u3002<\/p>\n\n\n\n<p><strong>1.\u5b9a\u4e49\u4e00\u4e2a <code>RunService<\/code>\u4e0d\u5b9e\u73b0\u4efb\u4f55\u63a5\u53e3\u3002<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class RunService {\n    public void run(){\n        System.out.println(\"\u8dd1\u6b65\");\n    }\n}<\/pre>\n\n\n\n<p><strong>2.<code>InvocationHandler<\/code>\u7ee7\u7eed\u4f7f\u7528\u4e0a\u9762\u7684<code>LogHandler<\/code>\u3002<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class LogHandler implements InvocationHandler {\n    private Object target; \/\/ \u88ab\u4ee3\u7406\u5bf9\u8c61\n\n    public LogHandler(Object target){\n        this.target = target;\n    }\n\n    @Override\n    public Object invoke(Object o, Method method, Object[] objects) throws Throwable {\n        before(); \/\/ \u4e8b\u524d\u6267\u884c\u65b9\u6cd5\uff0c \u6bd4\u5982\u6253\u5370\u65e5\u5fd7\uff0c \u53c2\u6570\u6821\u9a8c\n        Object result =  method.invoke(target, objects);\n        after(); \/\/ \u4e8b\u540e\u6267\u884c\u65b9\u6cd5\uff0c \u6bd4\u5982\u5b89\u5168\u68c0\u67e5\n        return result; \/\/ \u8fd4\u56de\u6267\u884c\u7ed3\u679c\n    }\n\n    void before(){\n        System.out.println(\"\u5f00\u59cb\u6253\u5370\u65e5\u5fd7\");\n    }\n\n    void after(){\n        System.out.println(\"\u5b8c\u6210\u6253\u5370\u65e5\u5fd7\");\n    }\n}\n<\/pre>\n\n\n\n<p><strong>3.\u5728<code>Client<\/code>\u7aef\u901a\u8fc7<code>Proxy.newInstance<\/code>\u83b7\u53d6\u4ee3\u7406\u7c7b\u5b9e\u4f8b\uff0c\u5e76\u8c03\u7528<code>run<\/code>\u65b9\u6cd5\u3002<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public class UserClient {\n    public static void main(String[] args) {\n\n       System.getProperties().put(\"jdk.proxy.ProxyGenerator.saveGeneratedFiles\", \"true\");\n\n        System.out.println(\"\u5f00\u59cb\u6d4b\u8bd5...\");\n        RunService runService = new RunService();\n        ClassLoader classLoader = runService.getClass().getClassLoader();\n        Class&lt;?>[] interfaces = runService.getClass().getInterfaces();\n        LogHandler logHandler = new LogHandler(runService);\n\n        RunService runProxy = (RunService)Proxy.newProxyInstance(classLoader, interfaces, logHandler);\n        runProxy.run();\n        System.out.println(\"\u7ed3\u675f\u6d4b\u8bd5...\");\n\n    }\n}<\/pre>\n\n\n\n<p>\u6b64\u5904IDEA\u4e2d\u4ee3\u7801\u5e76\u6ca1\u6709\u62a5\u9519\uff0c \u7f16\u8bd1\u4e5f\u662f\u53ef\u4ee5\u901a\u8fc7\u7684\u3002<\/p>\n\n\n\n<p><strong>4.\u6267\u884c<code>UserClient<\/code>\u770b\u770b\u662f\u5426\u53ef\u4ee5\u6267\u884c\u6210\u529f\u3002<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245-1024x174.png\" alt=\"\" class=\"wp-image-6631\" width=\"624\" height=\"105\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245-1024x174.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245-300x51.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245-768x130.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245-830x141.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245-230x39.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245-350x59.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245-480x82.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-245.png 1378w\" sizes=\"(max-width: 624px) 100vw, 624px\" \/><\/figure><\/div>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u7b2c40\u884c\u62a5\u9519\u4e86\uff0c \u9519\u8bef\u5185\u5bb9\u4e3a\u751f\u6210\u7684\u52a8\u6001\u4ee3\u7406\u7c7b<code>$Proxy0<\/code>\u65e0\u6cd5\u8f6c\u6362\u4e3a<code>RunService<\/code>\u7c7b\u578b\u3002\u7ecf\u8fc7Debug <code>Proxy.newProxyInstance<\/code>\u65b9\u6cd5\u786e\u5b9e\u751f\u6210\u4e86\u4ee3\u7406\u7c7b\u5bf9\u8c61\uff0c \u90a3\u4e48\u662f\u4e3a\u4ec0\u4e48\u5462\uff0c\u6211\u4eec\u6765\u770b\u770b\u751f\u6210\u7684class\u6587\u4ef6\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/\n\/\/ Source code recreated from a .class file by IntelliJ IDEA\n\/\/ (powered by Fernflower decompiler)\n\/\/\n\npackage com.sun.proxy;\n\nimport java.lang.reflect.InvocationHandler;\nimport java.lang.reflect.Method;\nimport java.lang.reflect.Proxy;\nimport java.lang.reflect.UndeclaredThrowableException;\n\npublic final class $Proxy0 extends Proxy {\n    private static Method m1;\n    private static Method m2;\n    private static Method m0;\n\n    public $Proxy0(InvocationHandler var1) throws  {\n        super(var1);\n    }\n\n    public final boolean equals(Object var1) throws  {\n        try {\n            return (Boolean)super.h.invoke(this, m1, new Object[]{var1});\n        } catch (RuntimeException | Error var3) {\n            throw var3;\n        } catch (Throwable var4) {\n            throw new UndeclaredThrowableException(var4);\n        }\n    }\n\n    public final String toString() throws  {\n        try {\n            return (String)super.h.invoke(this, m2, (Object[])null);\n        } catch (RuntimeException | Error var2) {\n            throw var2;\n        } catch (Throwable var3) {\n            throw new UndeclaredThrowableException(var3);\n        }\n    }\n\n    public final int hashCode() throws  {\n        try {\n            return (Integer)super.h.invoke(this, m0, (Object[])null);\n        } catch (RuntimeException | Error var2) {\n            throw var2;\n        } catch (Throwable var3) {\n            throw new UndeclaredThrowableException(var3);\n        }\n    }\n\n    static {\n        try {\n            m1 = Class.forName(\"java.lang.Object\").getMethod(\"equals\", Class.forName(\"java.lang.Object\"));\n            m2 = Class.forName(\"java.lang.Object\").getMethod(\"toString\");\n            m0 = Class.forName(\"java.lang.Object\").getMethod(\"hashCode\");\n        } catch (NoSuchMethodException var2) {\n            throw new NoSuchMethodError(var2.getMessage());\n        } catch (ClassNotFoundException var3) {\n            throw new NoClassDefFoundError(var3.getMessage());\n        }\n    }\n}\n<\/pre>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u7531\u4e8e<code>RunService<\/code>\u6ca1\u6709\u5b9e\u73b0\u4efb\u4f55\u63a5\u53e3\uff0c \u6240\u4ee5\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u4e5f\u6ca1\u6709\u5b9e\u73b0\u4efb\u4efb\u4f55\u63a5\u53e3\uff0c \u5e76\u4e14\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u53ea\u67093\u4e2a\u9ed8\u8ba4\u7684\u65b9\u6cd5\uff0c \u5e76\u4e0d\u5305\u542b\u671f\u5f85\u7684<code>run<\/code>\u65b9\u6cd5\u3002\u7531\u4e8e<code>$Proxy0<\/code>\u7c7b\u548c<code>RunService<\/code>\u6ca1\u6709\u5b9e\u73b0\u5171\u540c\u7684\u63a5\u53e3\u4e5f\u6ca1\u6709\u7ee7\u627f\u5171\u540c\u7684\u7236\u7c7b\uff0c \u6240\u4ee5\u5b83\u4eec\u65e0\u6cd5\u76f8\u4e92\u8f6c\u6362\uff0c \u5c31\u4f1a\u51fa\u73b0\u4e0a\u56fe\u4e2d\u8f6c\u6362\u5931\u8d25\uff0c \u7531\u4e8e\u4ee3\u7406\u7c7b\u662f\u8fd0\u884c\u65f6\u521b\u5efa\uff0c\u6240\u4ee5\u4ee3\u7406\u7f16\u8bd1\u5668\u5e76\u4e0d\u4f1a\u62a5\u51fa\u9519\u8bef\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\uff0c<code>ProxyGenerator.generateProxyClass<\/code>\u751f\u6210\u4ee3\u7406\u7c7b\u5b57\u8282\u7801\u7684\u65f6\u5019\uff0c \u662f\u6839\u636e\u88ab\u4ee3\u7406\u7c7b\u7ee7\u627f\u7684\u63a5\u53e3\u6765\u6784\u9020<code>Method<\/code>\uff0c \u6240\u4ee5\u4ee3\u7406\u7c7b\u81ea\u8eab\u7684\u65b9\u6cd5\u5e76\u4e0d\u4f1a\u88ab\u6dfb\u52a0\u5230\u4ee3\u7406\u7c7b\u4e2d\uff0c \u5982\u679c\u88ab\u4ee3\u7406\u7c7b\u4e0d\u5b9e\u73b0\u4efb\u4f55\u65b9\u6cd5\uff0c \u867d\u7136\u53ef\u4ee5\u6210\u529f\u751f\u6210\u4ee3\u7406\u7c7b\uff0c \u4f46\u662f\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u53ea\u5305\u542b3\u4e2a\u9ed8\u8ba4\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u7efc\u4e0a\u4e0a\u8ff0\uff0c JDK\u52a8\u6001\u4ee3\u7406\u5fc5\u987b\u901a\u8fc7\u63a5\u53e3\u5b9e\u73b0\uff0c \u4e3b\u8981\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul><li>\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u81ea\u8eab\u5df2\u7ecf\u7ee7\u627f<code>java.lang.reflect.Proxy<\/code>\u7c7b\uff0c\u7531\u4e8eJava\u4e0d\u652f\u6301\u591a\u7ee7\u627f\uff0c \u6240\u4ee5\u88ab\u4ee3\u7406\u7c7b\u4e0d\u80fd\u7ee7\u627f\u4efb\u4f55\u7c7b\uff0c \u8d1f\u8d23\u65e0\u6cd5\u5b9e\u73b0\u3002 <\/li><li>\u5982\u679c\u88ab\u4ee3\u7406\u7c7b\u4e0d\u5b9e\u73b0\u4efb\u4f55\u63a5\u53e3\uff0c \u751f\u6210\u7684\u4ee3\u7406\u7c7b\u548c\u88ab\u4ee3\u7406\u7c7b\u65e0\u5171\u540c\u63a5\u53e3\u6216\u7236\u7c7b\uff0c\u65e0\u6cd5\u76f8\u4e92\u8f6c\u6362\uff0c\u4e14\u4e0d\u5305\u542b\u88ab\u4ee3\u7406\u7c7b\u81ea\u6709\u7684\u65b9\u6cd5\u3002 <\/li><li>\u5982\u679c\u4ee3\u7406\u7c7b\u81ea\u8eab\u5df2\u7ecf\u7ee7\u627f\u4e86\u5176\u4ed6\u7236\u7c7b\uff0c \u4e5f\u53ef\u4ee5\u6210\u529f\u751f\u6210\u4ee3\u7406\u7c7b\uff0c\u4f46\u662f\u751f\u6210\u7684\u4ee3\u7406\u7c7b\u548c\u4e0d\u5b9e\u73b0\u4efb\u4f55\u63a5\u53e3\u7684\u6548\u679c\u4e00\u6837\u3002<\/li><\/ul>\n\n\n\n<p><strong>1.5\u3001\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p><strong>JDK \u52a8\u6001\u4ee3\u7406<\/strong>\u7684\u5b9e\u73b0\u539f\u7406\u662f\u901a\u8fc7<code>\u53cd\u5c04<\/code> \u6765\u52a8\u6001\u521b\u5efa\u6216\u4fee\u6539\u5b57\u8282\u7801\u6765\u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\u3002\u5b83\u5305\u542b2\u4e2a\u6838\u5fc3\u7c7b\u5e93\uff1a<\/p>\n\n\n\n<ul><li><code>java.lang.reflect.InvocationHandler<\/code>: \u8d1f\u8d23\u5177\u4f53\u7684\u4e1a\u52a1\u4ee3\u7801\u6ce8\u5165\u3002<\/li><li><code>java.lang.reflect.Proxy<\/code>\uff1a \u8d1f\u8d23\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b\u3002<\/li><\/ul>\n\n\n\n<p>JDK \u52a8\u6001\u4ee3\u7406\u7684\u4e3b\u8981\u4f18\u70b9\u4e3a\uff1a<\/p>\n\n\n\n<ul><li>\u4f7f\u7528\u7b80\u5355\u3001\u7ef4\u62a4\u6210\u672c\u4f4e\u3002<\/li><li>Java\u539f\u751f\u652f\u6301\uff0c\u4e0d\u9700\u8981\u4efb\u4f55\u4f9d\u8d56\u3002<\/li><li>\u89e3\u51b3\u4e86\u9759\u6001\u4ee3\u7406\u5b58\u5728\u7684\u591a\u6570\u95ee\u9898\u3002<\/li><\/ul>\n\n\n\n<p>\u4e3b\u8981\u7f3a\u70b9\u4e3a\uff1a<\/p>\n\n\n\n<ul><li>\u7531\u4e8e\u4f7f\u7528\u53cd\u5c04\uff0c\u6027\u80fd\u4f1a\u6bd4\u8f83\u5dee\u3002<\/li><li>\u53ea\u652f\u6301\u63a5\u53e3\u5b9e\u73b0\uff0c\u4e0d\u652f\u6301\u7ee7\u627f\uff0c \u4e0d\u6ee1\u8db3\u6240\u6709\u4e1a\u52a1\u573a\u666f\u3002<\/li><\/ul>\n\n\n\n<p><strong>2\u3001 CGLIB<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p><strong>2.1\u3001\u6982\u8ff0<\/strong><\/p>\n\n\n\n<p><strong>1\u3001\u4ec0\u4e48\u662fCGLIB\uff1f<\/strong><\/p>\n\n\n\n<p><code>CGLIB<\/code>\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u3001\u9ad8\u6027\u80fd\u7684\u4ee3\u7801\u751f\u6210\u5e93\u3002\u5b83\u53ef\u4ee5\u5728\u8fd0\u884c\u671f\u6269\u5c55Java\u7c7b\u548c\u63a5\u53e3\uff0c\u5176\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8eAOP\u6846\u67b6\u4e2d\uff08Spring\u3001dynaop\uff09\u4e2d\uff0c \u7528\u4ee5\u63d0\u4f9b\u65b9\u6cd5\u62e6\u622a\u3002Hibernate\u4f5c\u4e3a\u4e00\u4e2a\u6bd4\u8f83\u53d7\u6b22\u8fce\u7684ORM\u6846\u67b6\uff0c \u7528\u5b83\u6765\u5b9e\u73b0PO\u5b57\u8282\u7801\u7684\u52a8\u6001\u751f\u6210\u3002 <code>CGLIB<\/code>\u6bd4<strong>JDK\u52a8\u6001\u4ee3\u7406<\/strong>\u66f4\u5f3a\u7684\u5730\u65b9\u5728\u4e8e\u5b83\u4e0d\u4ec5\u53ef\u4ee5\u63a5\u7ba1Java\u63a5\u53e3\uff0c \u8fd8\u53ef\u4ee5\u63a5\u7ba1\u666e\u901a\u7c7b\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p><code>CGLIB<\/code>\u7684\u5e95\u5c42\u539f\u7406\u662f\u4f7f\u7528\u7684<code>ASM<\/code>\u6765\u64cd\u7eb5\u5b57\u8282\u7801\u3002\u5b83\u4f5c\u4e3a\u4e00\u4e2a\u5f00\u6e90\u9879\u76ee\uff0c \u4ee3\u7801\u88ab\u6258\u7ba1\u5728<code>github<\/code>\u4e0a\uff0c \u9879\u76ee\u5730\u5740\u662f\uff1a<a href=\"https:\/\/links.jianshu.com\/go?to=https%3A%2F%2Fgithub.com%2Fcglib%2Fcglib\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/github.com\/cglib\/cglib<\/a>\u3002<strong>\u5b83\u901a\u8fc7\u64cd\u7eb5\u5b57\u8282\u7801\u751f\u6210\u88ab\u4ee3\u7406\u7c7b\u7684\u4e00\u4e2a\u6216\u591a\u4e2a\u5b50\u7c7b\u6765\u5b9e\u73b0\u5bf9\u88ab\u4ee3\u7406\u7c7b\u7684\u4ee3\u7406<\/strong>\u3002<\/p>\n\n\n\n<p><code>CGLIB<\/code>\u548c\u4e00\u4e9b\u5e38\u89c1\u6846\u67b6\u548c\u8bed\u8a00\uff08\u4e3b\u8981\u662fJava\uff09\u7684\u5173\u7cfb\u5982\u4e0b\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-246.png\" alt=\"\" class=\"wp-image-6637\" width=\"383\" height=\"246\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-246.png 648w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-246-300x193.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-246-230x148.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-246-350x225.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-246-480x308.png 480w\" sizes=\"(max-width: 383px) 100vw, 383px\" \/><\/figure><\/div>\n\n\n\n<ul><li>\u6700\u5e95\u5c42\u7684\u662f\u5b57\u8282\u7801\uff0c \u5b57\u8282\u7801\u662fJava\u4e3a\u4e86\u4fdd\u8bc1&#8221;<strong>\u4e00\u6b21\u7f16\u8bd1\u3001\u5230\u5904\u8fd0\u884c<\/strong>&#8220;\u800c\u4ea7\u751f\u7684\u4e00\u79cd\u865a\u62df\u6307\u4ee4\u683c\u5f0f\uff0c \u4f8b\u5982iload_0, iconst_1\u7b49\u7b49\u3002 <\/li><li>\u5b57\u8282\u7801\u4e0a\u9762\u4e00\u5c42\u7684\u662f<code>ASM<\/code>\uff0c <code>ASM<\/code>\u662fJava\u4e2d\u53ef\u4ee5\u76f4\u63a5\u64cd\u7eb5\u5b57\u8282\u7801\u7684\u4e00\u4e2a\u7c7b\u5e93, \u4f7f\u7528\u5b83\u9700\u8981\u5bf9Java\u5b57\u8282\u7801\u3001class\u7ec4\u7ec7\u7ed3\u6784\u6bd4\u8f83\u719f\u6089\u3002 <\/li><li>\u4f4d\u4e8e<code>ASM<\/code>\u4e4b\u4e0a\u7684\u662f<code>CGLIB<\/code>\u3001<code>Groovy<\/code>\u7b49\u6846\u67b6\u548c\u8bed\u8a00\uff0c\u5b83\u4eec\u901a\u8fc7<code>ASM<\/code>\u6846\u67b6\u52a8\u6001\u751f\u6210\u5b57\u8282\u7801\u6765\u53d8\u76f8\u6267\u884cJava\u7a0b\u5e8f\u3002\u8fd9\u4e5f\u8bf4\u660e<strong>Java\u5e76\u4e0d\u662f\u552f\u4e00\u53ef\u88abJVM\u6267\u884c\u7684\u8bed\u8a00\uff0c \u53ea\u8981\u53ef\u4ee5\u751f\u6210\u5b57\u8282\u7801\uff0cJVM\u5e76\u4e0d\u5173\u5fc3\u5b57\u8282\u7801\u7684\u6765\u6e90<\/strong>\u3002 <\/li><li>\u4f4d\u4e8e<code>CGLIB<\/code>\u7b49\u6846\u67b6\u4e4b\u4e0a\u7684\u5c31\u662f<code>Spring<\/code>\u3001<code>Hibernate<\/code>\u7b49\u8fd9\u4e9b\u6846\u67b6\u4e86\u3002<\/li><\/ul>\n\n\n\n<p><strong>2\u3001\u4e3a\u4ec0\u4e48\u4f7f\u7528CGLIB?<\/strong><\/p>\n\n\n\n<p><code>CGLIB<\/code>\u4ee3\u7406\u4e3b\u8981\u901a\u8fc7\u5bf9\u5b57\u8282\u7801\u64cd\u4f5c\uff0c \u4e3a\u5bf9\u8c61\u5f15\u5165\u4e0d\u540c\u7684\u5b50\u7c7b\uff0c\u4ee5\u63a7\u5236\u5bf9\u8c61\u7684\u8bbf\u95ee\u3002<code>CGLIB<\/code>\u4e3b\u8981\u89e3\u51b3<strong>JDK\u52a8\u6001\u4ee3\u7406<\/strong>\u8981\u6c42\u88ab\u4ee3\u7406\u7c7b\u5fc5\u987b\u7ee7\u627f\u63a5\u53e3\u7684\u7f3a\u70b9\uff0c\u5b83\u53ef\u4ee5\u5bf9\u975e\u7ee7\u627f\u81ea\u63a5\u53e3\u7684\u7c7b\u8fdb\u884c\u4ee3\u7406\uff0c \u540c\u65f6<code>CGLIB<\/code>\u7684\u529f\u80fd\u66f4\u52a0\u5f3a\u5927\uff0c \u652f\u6301\u66f4\u591a\u7684\u5b9a\u5236\u5316\u529f\u80fd\u3002<\/p>\n\n\n\n<p><strong>3\u3001\u5982\u4f55\u83b7\u5f97CGLIB\uff1f<\/strong><br><code>CGLIB<\/code>\u7684\u6e90\u7801\u7ef4\u62a4\u5728github\u4e0a\uff1a<a rel=\"noreferrer noopener\" href=\"https:\/\/links.jianshu.com\/go?to=https%3A%2F%2Fgithub.com%2Fcglib%2Fcglib\" target=\"_blank\">https:\/\/github.com\/cglib\/cglib<\/a>\u3002\u5f00\u53d1\u7684\u65f6\u5019\u9700\u8981\u5f15\u5165cglib\u7684jar\u5305\uff0c \u53ef\u4ee5\u901a\u8fc7maven\u6765\u5f15\u5165\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">&lt;!-- https:\/\/mvnrepository.com\/artifact\/cglib\/cglib -->\n&lt;dependency>\n    &lt;groupId>cglib&lt;\/groupId>\n    &lt;artifactId>cglib&lt;\/artifactId>\n    &lt;version>cglib-version&lt;\/version>\n&lt;\/dependency>\n<\/pre>\n\n\n\n<p><strong>4\u3001CGLIB\u7684\u6e90\u7801\u7ed3\u6784<\/strong><br>\u4ee5<code>cglib-3.3.0<\/code>\u4e3a\u4f8b\uff0c \u5b83\u4e3b\u8981\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a\u6a21\u5757\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247-1024x599.png\" alt=\"\" class=\"wp-image-6640\" width=\"501\" height=\"293\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247-1024x599.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247-300x175.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247-768x449.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247-830x485.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247-230x134.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247-350x205.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247-480x281.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-247.png 1310w\" sizes=\"(max-width: 501px) 100vw, 501px\" \/><\/figure><\/div>\n\n\n\n<ul><li><code>net.sf.cglib.beans<\/code>: JavaBean\u7684\u5de5\u5177\u7c7b\u3002 <\/li><li><code>net.sf.cglib.core<\/code>:\u5e95\u5c42\u5b57\u8282\u7801\u5904\u7406\u7c7b\uff0c \u5927\u90e8\u5206\u548cASM\u6709\u5173\u7cfb\u3002<\/li><li> <code>net.sf.cglib.proxy<\/code>:\u5b9e\u73b0\u521b\u5efa\u4ee3\u7406\u548c\u65b9\u6cd5\u62e6\u622a\u5668\u7684\u7c7b\u3002 <\/li><li><code>net.sf.cglib.reflect<\/code>:\u5b9e\u73b0Fast\u53cd\u5c04\u548cC#\u98ce\u683c\u7684\u7c7b\u3002 <\/li><li><code>net.sf.cglib.transform<\/code>:\u7f16\u8bd1\u5668\u6216\u8fd0\u884c\u671f\u7c7b\u548c\u7c7b\u6587\u4ef6\u7684\u8f6c\u6362\u5de5\u5177\u3002 <\/li><li><code>net.sf.cglib.util<\/code>: \u5176\u4ed6\u5de5\u5177\u7c7b\u3002<\/li><\/ul>\n\n\n\n<p>CGLIB\u7684\u5e95\u5c42\u4e3b\u8981\u662f\u901a\u8fc7ASM\u6765\u64cd\u7eb5\u5b57\u8282\u7801\u5b9e\u73b0\u7c7b\u7684\u52a8\u6001\u751f\u6210\u3002\u5bf9\u4e8e\u521b\u5efa\u52a8\u6001\u4ee3\u7406\uff0c \u5927\u90e8\u5206\u60c5\u51b5\u4e0b\uff0c \u53ea\u9700\u8981\u4f7f\u7528<code>net.sf.cglib.proxy<\/code>\u5305\u7684\u4e00\u90e8\u5206API\u5373\u53ef\u3002<\/p>\n\n\n\n<p>CGLIB\u7684\u52a8\u6001\u5173\u8054\u56fe\u5982\u4e0b\uff1a<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248-1024x670.png\" alt=\"\" class=\"wp-image-6641\" width=\"500\" height=\"327\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248-1024x670.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248-300x196.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248-768x503.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248-830x543.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248-230x151.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248-350x229.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248-480x314.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/07\/\u56fe\u7247-248.png 1360w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure><\/div>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\uff0c \u5b83\u6838\u5fc3\u7684API\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<ul><li><code>net.sf.cglib.Enhancer<\/code>: \u4ee3\u7801\u589e\u5f3a\u5668\uff0c \u7528\u6765\u52a8\u6001\u751f\u6210\u76ee\u6807\u7c7b\u7684\u4ee3\u7406\u7c7b\u8fdb\u884c\u4ee3\u7406\u3002 <\/li><li><code>net.sf.cglib.Callback<\/code>\uff1a \u76ee\u6807\u7c7b\u88ab\u8c03\u7528\u65f6\uff0c \u88ab\u62e6\u622a\u540e\u8c03\u7528\u7684\u56de\u8c03\uff0c \u7528\u6765\u5b9e\u73b0\u5177\u4f53\u7684\u56de\u8c03\u903b\u8f91\uff0c \u589e\u5f3a\u4e1a\u52a1\u4ee3\u7801\uff0c \u6bd4\u5982\u6253\u5370\u65e5\u5fd7\u3001\u5b89\u5168\u68c0\u67e5\u7b49\u7b49\u3002<\/li><\/ul>\n\n\n\n<p><strong>5\u3001CGLIB\u7684\u91cd\u8981API<\/strong><\/p>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.Enhancer<\/code>: <code>CGLIB<\/code>\u4e2d\u7684\u5b57\u8282\u7801\u589e\u5f3a\u5668\uff0c \u7c7b\u4f3c\u4e8eJDK\u91cc\u7684<code>java.lang.reflect.Proxy<\/code>\uff0c \u5b83\u65e2\u53ef\u4ee5\u4ee3\u7406\u63a5\u53e3\uff0c \u4e5f\u53ef\u4ee5\u4ee3\u7406\u666e\u901a\u7684Java\u7c7b, \u5b83\u901a\u8fc7\u521b\u5efa\u88ab\u4ee3\u7406\u7c7b\u7684\u5b50\u7c7b\u5e76\u62e6\u622a\u6240\u6709\u7684\u65b9\u6cd5\u8c03\u7528\uff08\u5305\u62ec<code>Object#toString()<\/code>\u3001<code>Object#hashCode<\/code>\uff09\uff0c \u4f46\u662f\u5b83\u4e0d\u80fd\u62e6\u622a<code>final<\/code>\u4fee\u9970\u7684\u65b9\u6cd5\uff08\u5982Object#getClass()\uff09, \u4e5f\u4e0d\u80fd\u4ee3\u7406<code>final<\/code>\u4fee\u9970\u7684\u7c7b\u3002<code>Enhancer<\/code>\u7c7b\u5305\u542b\u51e0\u4e2a\u6838\u5fc3\u7684\u540c\u540d\u91cd\u8f7d\u65b9\u6cd5<code>create<\/code>\u6765\u521b\u5efa\u4ee3\u7406\u7c7b\uff0c \u8c03\u7528<code>create<\/code>\u65b9\u6cd5\u4e4b\u524d\u9700\u8981\u9884\u5148\u8bbe\u7f6e\u88ab\u4ee3\u7406\u7c7b<code>setSuperClass<\/code>\u3001\u8bbe\u7f6e\u4ee3\u7406\u56de\u8c03<code>setCallback<\/code>\u6216<code>setCallbacks<\/code>\u7b49\u7b49\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.Callback<\/code>: <code>CGLIB<\/code>\u4e2d\u7684\u56de\u8c03\uff0c \u4f5c\u7528\u7c7b\u4f3c\u4e8eJDK\u91cc\u7684<code>java.lang.reflect.InvocationHandler<\/code>\uff0c \u8d1f\u8d23\u4e1a\u52a1\u65b9\u6cd5\u7684\u5b9e\u73b0\u548c\u589e\u5f3a\u3002 \u5b83\u7684\u56de\u8c03\u65f6\u673a\u662f\u88ab\u4ee3\u7406\u7c7b\u7684\u65b9\u6cd5\u88ab\u8c03\u7528\u7684\u65f6\u5019\uff0c \u5373\u88ab\u4ee3\u7406\u7c7b\u7684\u65b9\u6cd5\u88ab\u8c03\u7528\u65f6\uff0c <code>Callback<\/code>\u7684\u5b9e\u73b0\u903b\u8f91\u5c31\u4f1a\u88ab\u8c03\u7528\u3002\u53ef\u4ee5\u901a\u8fc7<code>Enhancer#setCallback()<\/code>\u548c<code>Enhancer#setCallbacks\uff08\uff09<\/code>\u8bbe\u7f6e<code>Callback<\/code>\uff0c \u82e5\u8bbe\u7f6e\u4e86\u591a\u4e2a<code>Callback<\/code>\uff0c \u5219\u4f1a\u6309\u7167\u8bbe\u7f6e\u7684\u987a\u5e8f\u8fdb\u884c\u56de\u8c03\u3002\u5b83\u53ea\u662f\u4e00\u4e2a\u6807\u8bc6\u63a5\u53e3\uff0c <code>CGLIB<\/code>\u63d0\u4f9b\u4e86\u591a\u4e2a\u5b83\u7684\u5b50\u7c7b\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.CallbackFilter<\/code>: <code>CallbackFilter<\/code>\u53ef\u4ee5\u5b9e\u73b0\u4e0d\u540c\u7684\u65b9\u6cd5\u4f7f\u7528\u4e0d\u540c\u7684\u56de\u8c03\u65b9\u6cd5\u3002\u5b83\u7684<code>int accept(Method method)<\/code>\u65b9\u6cd5\uff0c \u6839\u636e\u4e0d\u540c\u7684method\u8fd4\u56de\u4e0d\u540c\u7684\u503c<code>i<\/code>,\u8fd9\u4e2a\u503c\u65f6\u56de\u8c03\u96c6\u5408<code>callbacks<\/code>\u4e2d\u7684\u987a\u5e8f\uff0c \u5c31\u662f\u8c03\u7528\u4e86<code>callbacks[i]<\/code>\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.Dispatcher<\/code>: <code>Callback<\/code>\u7684\u5e38\u7528\u5b50\u7c7b\u4e4b\u4e00\uff0c \u4e3b\u8981\u5e94\u7528\u5728\u61d2\u52a0\u8f7d\u573a\u666f\u4e0b\uff0c \u548c<code>LazyLoader<\/code>\u4e0d\u540c\u7684\u662f\u6bcf\u6b21\u8c03\u7528\u4ee3\u7406\u65b9\u6cd5\u65f6\u90fd\u4f1a\u8c03\u7528\u5230<code>loadObject<\/code>\u65b9\u6cd5\u52a0\u8f7d\u88ab\u4ee3\u7406\u5bf9\u8c61\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.FixedValue<\/code>: <code>Callback<\/code>\u7684\u5e38\u7528\u5b50\u7c7b\u4e4b\u4e00\uff0c \u5f3a\u5236\u4e00\u4e2a\u7279\u5b9a\u65b9\u6cd5\u8fd4\u56de\u56fa\u5b9a\u503c\uff0c \u7279\u5b9a\u573a\u666f\u4e0b\u975e\u5e38\u6709\u7528\u4e14\u6027\u80fd\u9ad8\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.LazyLoader<\/code>: <code>Callback<\/code>\u7684\u5e38\u7528\u5b50\u7c7b\u4e4b\u4e00\uff0c \u4e3b\u8981\u5e94\u7528\u5728\u61d2\u52a0\u8f7d\u573a\u666f\u4e0b\uff0c \u5b83\u6709\u4e00\u4e2a<code>Object loadObject()<\/code>\u65b9\u6cd5\uff0c\u7528\u6765\u88ab\u4ee3\u7406\u5bf9\u8c61\u61d2\u52a0\u8f7d\u65f6\u521d\u59cb\u5316\u8be5\u5bf9\u8c61\u3002 \u5b83\u7684\u7279\u70b9\u662f\u5f53\u88ab\u58f0\u660e\u4e3a\u61d2\u52a0\u8f7d\u7684\u5bf9\u8c61\u5df2\u7ecf\u88ab\u52a0\u8f7d\u5b8c\u6210\u540e\uff0c \u4e0b\u6b21\u8c03\u7528\u65f6\uff0c \u5c31\u4f1a\u76f4\u63a5\u4f7f\u7528\u8be5\u5bf9\u8c61\uff0c \u4e0d\u4f1a\u518d\u6b21\u8c03\u7528<code>loadObject()<\/code>\u65b9\u6cd5\u8fdb\u884c\u52a0\u8f7d\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.MethodInterceptor<\/code>:<code>Callback<\/code>\u7684\u6700\u5e38\u7528\u5b50\u7c7b\uff0c \u662f\u6700\u5e38\u7528\u7684\u56de\u8c03\u7c7b\u578b\u3002\u5b83\u88ab\u8bbe\u7f6e\u4e3a\u65b9\u6cd5\u56de\u8c03\u65f6\uff0c \u5f53\u8c03\u7528\u4ee3\u7406\u7684\u65b9\u6cd5\u65f6\uff0c \u9996\u5148\u4f1a\u8c03\u7528\u5b83\u7684<code>intercept<\/code>\u65b9\u6cd5\uff0c\u7136\u540e\u8c03\u7528\u88ab\u4ee3\u7406\u5bf9\u8c61\u7684\u76ee\u6807\u65b9\u6cd5\uff0c \u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\u5728\u8c03\u7528\u524d\u540e\u53ef\u4ee5\u505a\u4e00\u4e9b\u4e1a\u52a1\u589e\u5f3a\u7684\u529f\u80fd\u3002<code>intercept<\/code>\u65b9\u6cd5\u67094\u4e2a\u53c2\u6570\uff0c \u5206\u522b\u662f\u4ee3\u7406\u5bf9\u8c61<code>Object<\/code>\u3001\u88ab\u4ee3\u7406\u7684\u65b9\u6cd5<code>Method<\/code>\u3001\u88ab\u4ee3\u7406\u65b9\u6cd5\u7684\u53c2\u6570<code>Object[] objects<\/code>\u3001\u88ab\u4ee3\u7406\u65b9\u6cd5\u7684\u4ee3\u7406<code>MethodProxy<\/code>\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.ProxyRefDispatcher<\/code>: <code>Callback<\/code>\u7684\u5b50\u7c7b\u4e4b\u4e00\uff0c \u548c<code>Dispatcher<\/code>\u76f8\u540c\uff0c \u4e0d\u540c\u7684\u662f\u5b83\u7684<code>loadObject<\/code>\u65b9\u6cd5\u652f\u6301\u4f20\u5165\u4ee3\u7406\u5bf9\u8c61\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.NoOp<\/code>: <code>Callback<\/code>\u7684\u5b50\u7c7b\u4e4b\u4e00\uff0c \u5b83\u4ee3\u8868\u4ec0\u4e48\u90fd\u4e0d\u505a\uff0c \u76f4\u63a5\u8c03\u7528\u88ab\u4ee3\u7406\u7c7b\u7684\u65b9\u6cd5\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.InterfaceMaker<\/code>: \u987e\u540d\u601d\u4e49\uff0c \u5b83\u662f\u4e00\u4e2a\u63a5\u53e3\u751f\u6210\u5668\uff0c \u5b83\u53ef\u4ee5\u6839\u636e\u6307\u5b9a\u7684\u7c7b\u52a8\u6001\u751f\u6210\u4e00\u4e2a\u63a5\u53e3\uff0c \u8be5\u63a5\u53e3\u5305\u542b\u6307\u5b9a\u7c7b\u5b9a\u4e49\u7684\u6240\u6709\u65b9\u6cd5\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.InvocationHandler<\/code>: <code>CGLIB<\/code>\u4e2d\u53c2\u8003<strong>JDK\u52a8\u6001\u4ee3\u7406<\/strong>\u5b9e\u73b0\u7684<code>InvocationHandler<\/code>\uff0c \u53ef\u4ee5\u548c<code>net.sf.cglib.proxy.Proxy<\/code>\u914d\u5408\u66ff\u6362JDK\u7684<code>java.lang.reflect.Proxy<\/code>\u548c<code>java.lang.reflect.InvocationHandler<\/code>, \u5b83\u540c\u6837\u4e5f\u5b9a\u4e49\u4e86\u4e00\u4e2a<code>invoke<\/code>\u65b9\u6cd5\uff0c \u4f9b\u6309\u7167<strong>JDK\u52a8\u6001\u4ee3\u7406<\/strong>\u7684\u65b9\u5f0f\u5b9e\u73b0\u4e1a\u52a1\u4ee3\u7801\u7684\u589e\u5f3a\u4fee\u6539\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy:Proxy<\/code>:<code>CGLIB<\/code>\u4e2d\u53c2\u8003<strong>JDK\u52a8\u6001\u4ee3\u7406<\/strong>\u5b9e\u73b0\u7684\u4ee3\u7406\u751f\u6210\u7c7b\uff0c \u53ef\u4ee5\u548c<code>CGLIB<\/code>\u81ea\u5e26\u7684<code>InvocationHandler<\/code>\u914d\u5408\u6309\u7167<code>JDK\u52a8\u6001\u4ee3\u7406<\/code>\u89c4\u8303\u5b9e\u73b0\u52a8\u6001\u4ee3\u7406\uff0c \u5b83\u548c<code>java.lang.reflect.Proxy<\/code>\u4e00\u6837\u652f\u6301<code>newProxyInstance<\/code>\u65b9\u6cd5\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b\u3002\u5b83\u7684\u5185\u90e8\u662f\u8c03\u7528<code>Enhancer<\/code>\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b\uff0c \u5e76\u4e14\u8bbe\u7f6e\u4e86\u4e00\u4e2a\u9ed8\u8ba4\u7684<code>CallbackFilter<\/code>\uff0c \u5f53\u62e6\u622a\u5230<code>Object#hashCode<\/code>\u3001<code>Object#equals<\/code>\u3001<code>Object#toString<\/code>3\u4e2a\u65b9\u6cd5\u65f6\uff0c \u8c03\u7528<code>NoOp<\/code>\u56de\u8c03\uff0c \u5565\u90fd\u4e0d\u505a\uff0c \u76f4\u63a5\u8c03\u7528\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c \u5f53\u62e6\u622a\u5230\u5176\u4ed6\u65b9\u5f0f\u65f6\uff0c \u8c03\u7528\u7528\u6237\u91cd\u5199\u7684<code>InvocationHandler<\/code>\u6765\u5b9e\u73b0\u56de\u8c03\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.CallbackGenerator<\/code>: <code>Callback<\/code>\u7684\u5904\u7406\u63a5\u53e3\uff0c \u5b83\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c \u5305\u542b2\u4e2a\u91cd\u8981\u7684\u65b9\u6cd5<code>generate<\/code>\u548c <code>generateStatic<\/code>\uff0c \u4e3b\u8981\u7528\u6765\u5b9e\u73b0\u8986\u76d6\u7236\u7c7b\u7684\u65b9\u6cd5\uff0c \u6bcf\u4e00\u4e2a<code>Callback<\/code>\u5b50\u63a5\u53e3\u90fd\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684<code>CallbackGenerator<\/code>\u5b50\u7c7b\u3002<\/li><\/ul>\n\n\n\n<ul><li><code>net.sf.cglib.proxy.Factory<\/code>: <code>CGLIB<\/code>\u5b9e\u73b0\u4ee3\u7406\u6240\u5fc5\u8981\u5b9e\u73b0\u7684\u63a5\u53e3\uff0c\u7528\u4e8e\u63d0\u4f9b\u4e00\u4e9b\u5de5\u5177\u65b9\u6cd5\u3002<\/li><\/ul>\n\n\n\n<p><strong>6\u3001CGLIB\u7684\u4f7f\u7528\u8fc7\u7a0b<\/strong><\/p>\n\n\n\n<p><code>CGLIB<\/code>\u7684\u4f7f\u7528\uff0c \u9700\u8981\u5148\u5b9e\u73b0\u4e00\u4e2a<code>Callback<\/code>\u56de\u8c03, \u4e00\u822c\u5e38\u7528\u7684\u662f<code>MethodInterceptor<\/code>\u5b50\u7c7b\uff0c\u5b83\u53ef\u4ee5\u6ee1\u8db3\u5927\u591a\u6570\u7684\u52a8\u6001\u4ee3\u7406\u9700\u6c42\uff0c \u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul><li>1.\u521b\u5efa\u4e00\u4e2a\u88ab\u4ee3\u7406\u7c7b\u3002<\/li><li>2.\u521b\u5efa\u4e00\u4e2a\u7c7b\u5b9e\u73b0<code>Callback<\/code>\u6216<code>Callback<\/code>\u7684\u5b50\u63a5\u53e3\u5e76\u91cd\u5199\u4e1a\u52a1\u7ec7\u5165\u7684\u903b\u8f91\uff0c \u4e5f\u53ef\u4ee5\u4e0d\u5b9e\u73b0\uff0c \u4f7f\u7528\u9ed8\u8ba4\u7684<code>NoOp<\/code>\u5373\u53ef\uff0c \u529f\u80fd\u548c\u6ca1\u4f7f\u7528\u52a8\u6001\u4ee3\u7406\u4e00\u6837\uff0c \u76f4\u63a5\u8c03\u7528\u88ab\u4ee3\u7406\u7c7b\u7684\u65b9\u6cd5\u3002<\/li><li>3.\u521b\u5efa\u4e00\u4e2a<code>Enhancer<\/code>\u5b57\u8282\u7801\u589e\u5f3a\u5668\u5bf9\u8c61\uff0c \u4e3a\u8be5\u5bf9\u8c61\u8bbe\u7f6e\u88ab\u4ee3\u7406\u7c7b(<code>setSuperClass<\/code>)\u3001\u56de\u8c03<code>setCallback<\/code>\u3001\u56de\u8c03\u987a\u5e8f<code>setCallbackFilter<\/code>\u7b49\u7b49\u5c5e\u6027\u3002<\/li><li>4.\u8c03\u7528<code>Enhancer<\/code>\u5b9e\u4f8b\u7684<code>create<\/code>\u65b9\u6cd5\uff0c \u52a8\u6001\u751f\u6210\u4e00\u4e2a\u88ab\u4ee3\u7406\u7c7b\u5b50\u7c7b\u7684\u5b57\u8282\u7801\u5e76\u8fd4\u56de\u5b9e\u4f8b\u3002<\/li><li>5.\u5ba2\u6237\u7aef\u8c03\u7528\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u5177\u4f53\u4e1a\u52a1\u65b9\u6cd5\uff0c \u6ce8\u610f\u8fd9\u91cc\u8c03\u7528\u7684\u662f<code>CGLIB<\/code>\u4e3a\u88ab\u4ee3\u7406\u7c7b\u751f\u6210\u7684\u4e00\u4e2a\u5b50\u7c7b\u7684\u5b9e\u4f8b\uff0c \u800c\u4e0d\u662f\u88ab\u4ee3\u7406\u7c7b\u7684\u5b9e\u4f8b\uff0c <code>CGLIB<\/code>\u751f\u6210\u7684\u52a8\u6001\u4ee3\u7406\u7c7b\u90fd\u4f1a\u7ee7\u627f\u88ab\u4ee3\u7406\u7c7b\u3002<\/li><\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\/\/1. \u521b\u5efa\u88ab\u4ee3\u7406\u7c7bTarget\n\n\/\/2. \u5b9e\u73b0\u56de\u8c03Callback\n\n\/\/3. \u521d\u59cb\u5316Enhancer\nEnhancer enhancer = new Enhancer();\n\/\/ \u8bbe\u7f6e\u88ab\u4ee3\u7406\u7c7b\nenhancer.setSuperClass(Target.class);\n\/\/ \u8bbe\u7f6e\u56de\u8c03\nenhancer.setCallBack(new Callback());\nenhancer.setCallbacks({newCallback1(), new Callback2()});\n\/\/ \u8bbe\u7f6e\u56de\u8c03\u987a\u5e8f\uff0c\u53ef\u4ee5\u5ffd\u7565\uff0c\n\/\/ \u5ffd\u7565\u7684\u8bdd\u5c31\u4f1a\u5bf9\u76ee\u6807\u7c7b\u6240\u6709\u7684\u65b9\u6cd5\u6267\u884c\u76f8\u540c\u7684\u56de\u8c03\u3002\nenhancer.setCallbackFilter(new CallbackFilter());\n\n\/\/4. \u83b7\u53d6\u4ee3\u7406\u5bf9\u8c61\nTarget targetProxy = (Target)enhancer.create();\n\n\/\/ 5. \u5ba2\u6237\u7aef\u8c03\u7528\ntargetProxy.method();\n<\/pre>\n\n\n\n<p>\u8f6c\u8f7d\uff1ahttps:\/\/www.jianshu.com\/p\/dac09ec2940b<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u6982\u8ff0 1\u3001\u4ec0\u4e48\u662f\u4ee3\u7406 \u4ee3\u7406\u6a21\u5f0f\u662f\u5e38\u89c1\u7684Java\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u7684\u8bbe\u8ba1\u662f\u4ee3\u7406\u7c7b\u548c\u59d4\u6258\u7c7b\u6709\u76f8\u540c\u7684\u63a5\u53e3\uff0c \u4ee3\u7406\u7c7b\u4e3b\u8981 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/6604"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6604"}],"version-history":[{"count":21,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/6604\/revisions"}],"predecessor-version":[{"id":6651,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/6604\/revisions\/6651"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}