{"id":9955,"date":"2023-03-16T13:10:22","date_gmt":"2023-03-16T05:10:22","guid":{"rendered":"http:\/\/123.57.164.21\/?p=9955"},"modified":"2023-03-16T13:10:22","modified_gmt":"2023-03-16T05:10:22","slug":"bytebuddy%e5%85%a5%e9%97%a8%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=9955","title":{"rendered":"ByteBuddy\u5165\u95e8\u6559\u7a0b"},"content":{"rendered":"\n<p><strong>\u80cc\u666f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u6700\u8fd1\u5de5\u4f5c\u4e2d\u8981\u505a\u4e00\u4e9b\u6d41\u91cf\u56de\u653e\u7684\u4e8b\u60c5\uff0c\u5176\u4e2d\u7528\u5230\u4e86\u5b57\u8282\u7801\u4fee\u6539\u76f8\u5173\u7684\u6280\u672f\uff0c\u6211\u4eec\u4f7f\u7528\u7684\u662fByteBuddy\u8fd9\u4e2a\u7c7b\u578b\uff0c\u56e0\u4e3a\u4e4b\u524d\u6ca1\u6709\u63a5\u89e6\u8fc7\u8fd9\u4e2a\u7c7b\u5e93\uff0c\u6240\u4ee5\u7f51\u4e0a\u770b\u4e86\u4e00\u4e9b\u6559\u7a0b\uff0c\u53d1\u73b0\u6709\u4e00\u4e2a\u82f1\u6587\u6587\u7ae0\u6bd4\u8f83\u9002\u5408\u5165\u95e8\uff0c\u4e3a\u4e86\u7406\u89e3\u7684\u66f4\u52a0\u6df1\u523b\u540c\u65f6\u63d0\u9ad8\u81ea\u8eab\u7684\u82f1\u6587\u9605\u8bfb\u6c34\u5e73\uff0c\u6240\u4ee5\u5c06\u5176\u7ffb\u8bd1\u6210\u4e86\u4e2d\u6587\uff0c\u5982\u679c\u6709\u4e4e\u53cb\u4e5f\u6b63\u5728\u4f7f\u7528ByteBuddy\uff0c\u53ef\u4ee5\u7559\u8a00\u76f8\u4e92\u4ea4\u6d41\u4e0b\uff0c\u5982\u679c\u8fd8\u53ef\u4ee5\u5e2e\u52a9\u5230\u4e00\u4e9b\u4e4e\u53cb\u90a3\u5c31\u66f4\u597d\u4e86\u3002<\/p>\n\n\n\n<p>\u4e0b\u9762\u7684\u5185\u5bb9\u7ffb\u8bd1\u81ea<a rel=\"noreferrer noopener\" href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/www.baeldung.com\/byte-buddy\" target=\"_blank\">A Guide to Byte Buddy<\/a>\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5176\u4e2d\u6709\u4e00\u4e9b\u6839\u636e\u6211\u81ea\u8eab\u7684\u7406\u89e3\u505a\u4e86\u4fee\u6539\uff0c\u6587\u7ae0\u4e2d\u7684\u4ee3\u7801\u53ea\u662f\u4e00\u4e9b\u5173\u952e\u4ee3\u7801\uff0c\u8981\u770b\u5b8c\u6574\u793a\u4f8b\u7684\u53ef\u4ee5\u62c9\u5230\u6587\u672b\uff0c\u4f5c\u8005\u4e5f\u63d0\u4f9b\u4e86\u76f8\u5e94\u7684github\u5e93\u3002<\/p>\n\n\n\n<p><strong>1. ByteBuddy\u662f\u4ec0\u4e48<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u7b80\u5355\u6765\u8bf4\uff0cByteBuddy\u662f\u4e00\u4e2a\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u751f\u6210java class\u7684\u7c7b\u5e93\u3002\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u4f1a\u4f7f\u7528ByteBuddy\u8fd9\u4e2a\u6846\u67b6\u64cd\u4f5c\u5df2\u7ecf\u5b58\u5728\u7684\u7c7b\uff0c\u521b\u5efa\u6307\u5b9a\u7684\u65b0\u7c7b\uff0c\u751a\u81f3\u62e6\u622a\u65b9\u6cd5\u8c03\u7528\u3002<\/p>\n\n\n\n<p><strong>2. \u4f9d\u8d56<\/strong><\/p>\n\n\n\n<p>\u5728\u5f00\u59cb\u5b9e\u73b0\u529f\u80fd\u4e4b\u524d\uff0c\u9700\u8981\u5148\u5c06bytebuddy\u7684\u4f9d\u8d56\u52a0\u5165\u5230\u9879\u76ee\u4e2d\u3002\u6211\u7684\u9879\u76ee\u662f\u57fa\u4e8emaven\u7684\uff0c\u6240\u4ee5\u9700\u8981\u5c06<\/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;dependency>\n    &lt;groupId>net.bytebuddy&lt;\/groupId>\n    &lt;artifactId>byte-buddy&lt;\/artifactId>\n    &lt;version>1.7.1&lt;\/version>\n&lt;\/dependency><\/pre>\n\n\n\n<p>\u52a0\u5165\u5230pom.xml\u4e2d\u3002\u5982\u679c\u9879\u76ee\u662f\u57fa\u4e8egradle\u7684\uff0c\u53ef\u4ee5\u5c06compile net.bytebuddy:byte-buddy:1.7.1\u8fd9\u4e2a\u4f9d\u8d56\u52a0\u5165\u5230build.gradle\u6587\u4ef6\u4e2d<\/p>\n\n\n\n<p><strong>3. \u8fd0\u884c\u65f6\u521b\u5efajava\u7c7b<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u9996\u5148\u6211\u4eec\u52a8\u6001\u521b\u5efa\u4e00\u4e2a\u73b0\u6709\u7c7b\u7684\u5b50\u7c7b\u3002\u6211\u4eec\u6765\u770b\u770b\u8fd9\u4e2abytebuddy\u4e2d\u7684\u666f\u70b9\u7684Hello World\u9879\u76ee\u3002<\/p>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f1a\u521b\u5efa\u4e00\u4e2a\u7c7b\uff0c\u8fd9\u4e2a\u7c7b\u662fObject.class\u7684\u5b50\u7c7b\u540c\u65f6\u4f1a\u8986\u76d6Object.class\u7684toString()\u65b9\u6cd5\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=\"\">DynamicType.Unloaded unloadedType = new ByteBuddy()\n  .subclass(Object.class)\n  .method(ElementMatchers.isToString())\n  .intercept(FixedValue.value(\"Hello World ByteBuddy!\"))\n  .make();<\/pre>\n\n\n\n<p>\u6211\u4eec\u4e00\u8d77\u770b\u4e0b\u4e0a\u9762\u7684\u4ee3\u7801\u7684\u542b\u4e49\uff1a<\/p>\n\n\n\n<ul><li>new ByteBuddy()\u5f88\u597d\u7406\u89e3\uff0c\u521b\u5efa\u4e86ByteBuddy\u7c7b\u578b\u7684\u4e00\u4e2a\u5b9e\u4f8b<\/li><li>subClass(Object.class)\u542b\u4e49\u662f\u52a8\u6001\u521b\u5efa\u7684\u7c7b\u662f\u7ee7\u627fObject\u7c7b\u7684<\/li><li>method(ElementMatchers.isToString())\u7c7b\u4f3c\u4e00\u4e2a\u7b5b\u9009\u5668\uff0c\u8fd9\u91cc\u9009\u4e2d\u7684\u662fObject\u7c7b\u4e2d\u7684toString()\u65b9\u6cd5<\/li><li>intercept(FixedValue.value(&#8220;Hello World ByteBuddy!&#8221;))\u63d0\u4f9b\u4e86\u4e86toString()\u7684\u5b9e\u73b0\uff0c\u8fd9\u91cc\u7684\u5b9e\u73b0\u662f\u8fd4\u56de\u4e00\u4e2a\u56fa\u5b9a\u7684\u503c&#8221;Hello World ByteBuddy!&#8221;<\/li><li>make()\u89e6\u53d1\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u7c7b<\/li><\/ul>\n\n\n\n<p>\u8fd9\u4e2a\u65f6\u5019\uff0c\u65b0\u7684\u7c7b\u5df2\u7ecf\u88ab\u521b\u5efa\u51fa\u6765\u4e86\uff0c\u4f46\u662f\u8fd8\u6ca1\u6709\u88ab\u52a0\u8f7d\u5230JVM\u4e2d\u3002\u8fd9\u4e2a\u65b0\u7684\u7c7b\u7684\u8868\u73b0\u5f62\u5f0f\u662fDynamicType.Unloaded\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5177\u4f53\u5730\u8bf4\u662fDynamicType.Unloaded\u4e2d\u5305\u542b\u4e86\u65b0\u7684\u7c7b\u7684\u5b57\u8282\u7801\u3002<\/p>\n\n\n\n<p>\u6240\u4ee5\u5728\u4f7f\u7528\u751f\u6210\u7684\u7c7b\u4e4b\u524d\u6211\u4eec\u5148\u8981\u628a\u5b83\u52a0\u8f7d\u5230JVM\u4e2d\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=\"\">Class&lt;?> dynamicType = unloadedType.load(getClass()\n  .getClassLoader())\n  .getLoaded();<\/pre>\n\n\n\n<p>\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u5b9e\u4f8b\u5316dynamicType\u4ee3\u8868\u7684class\u7c7b\u578b\uff0c\u7136\u540e\u8c03\u7528\u8fd9\u4e2a\u5b9e\u4f8b\u7684toString()\u65b9\u6cd5\u4e86\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=\"\">assertEquals(dynamicType.newInstance().toString(), \"Hello World ByteBuddy!\");<\/pre>\n\n\n\n<p>\u6ce8\u610f\uff1a\u8c03\u7528dynamicType.toString()\u65b9\u6cd5\u662f\u4e0d\u4f1a\u751f\u6548\u7684\uff0c\u56e0\u4e3a\u8fd9\u6837\u64cd\u4f5c\u5b9e\u9645\u4e0a\u662f\u4f1a\u8c03\u7528ByteBuddy.class\u7684toString()\u65b9\u6cd5<\/p>\n\n\n\n<p>newInstance()\u662f\u4e00\u4e2ajava\u53cd\u5c04\u65b9\u6cd5\u7528\u4e8e\u521b\u5efaByteBuddy\u5bf9\u8c61\u8868\u793a\u7684\u5b9e\u4f8b\uff1b\u8fd9\u4e2a\u65b9\u5f0f\u5c31\u7c7b\u4f3c\u4e8e\u4f7f\u7528\u65e0\u53c2\u6784\u9020\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p>\u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u4ec5\u4ec5\u662f\u5728\u6211\u4eec\u7684\u52a8\u6001\u521b\u5efa\u7684\u7c7b\u578b\u4e2d\u8986\u5199\u4e86\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5\u540c\u65f6\u8fd4\u56de\u4e00\u4e2a\u56fa\u5b9a\u7684\u503c\u3002\u5728\u4e0b\u4e00\u8282\u4e2d\uff0c\u6211\u4eec\u5c06\u5b9a\u4e49\u4e00\u4e2a\u81ea\u5b9a\u4e49\u903b\u8f91\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p><strong>4. \u65b9\u6cd5\u4ee3\u7406\u548c\u81ea\u5b9a\u4e49\u65b9\u6cd5\u903b\u8f91<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u5728\u524d\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u8986\u5199\u4e86\u7236\u7c7b\u7684toString()\u65b9\u6cd5\u5e76\u8fd4\u56de\u4e86\u4e00\u4e2a\u56fa\u5b9a\u7684\u503c\u3002<\/p>\n\n\n\n<p>\u4e8b\u5b9e\u4e0a\uff0c\u5e94\u7528\u4e2d\u9700\u8981\u7684\u903b\u8f91\u8981\u6bd4\u8fd9\u4e2a\u590d\u6742\u5f88\u591a\u3002\u4e3a\u52a8\u6001\u7c7b\u578b\u63d0\u4f9b\u81ea\u5b9a\u4e49\u903b\u8f91\u7684\u4e00\u79cd\u6709\u6548\u65b9\u6cd5\u662f\u65b9\u6cd5\u8c03\u7528\u7684\u59d4\u6258\u3002<\/p>\n\n\n\n<p>\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u52a8\u6001\u7c7b\u578b\uff0c\u8fd9\u4e2a\u52a8\u6001\u7c7b\u578b\u7ee7\u627fFoo.class\uff0c\u540c\u65f6Foo.class\u6709\u4e00\u4e2asayHelloFoo()\u65b9\u6cd5<\/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 String sayHelloFoo() { \n    return \"Hello in Foo!\"; \n}<\/pre>\n\n\n\n<p>\u6b64\u5916\uff0c\u8ba9\u6211\u4eec\u518d\u521b\u5efa\u4e00\u4e2aBar\u7c7b\uff0cBar\u7c7b\u5e26\u6709\u4e00\u4e2a\u9759\u6001\u7684sayHelloBar()\u65b9\u6cd5\uff0csayHelloBar()\u65b9\u6cd5\u7684\u524d\u9762\u548c\u8fd4\u56de\u7c7b\u578b\u548csayHelloFoo()\u65b9\u6cd5\u4e00\u81f4<\/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 String sayHelloBar() { \n    return \"Holla in Bar!\"; \n}<\/pre>\n\n\n\n<p>\u73b0\u5728\uff0c\u6211\u4eec\u4f7f\u7528ByteBuddy\u7684DSL\u5c06\u6240\u6709\u8c03\u7528sayHelloFoo()\u7684\u8bf7\u6c42\u90fd\u4ee3\u7406\u5230sayHelloBar()\u4e0a\u3002\u8fd9\u6837\u5c31\u5141\u8bb8\u6211\u4eec\u4f7f\u7528\u7eafjava\u8bed\u8a00\uff0c\u5728\u6211\u4eec\u8fd0\u884c\u65f6\u751f\u6210\u7684\u65b0\u7c7b\u4e0a\u63d0\u4f9b\u81ea\u5b9a\u4e49\u7684\u903b\u8f91\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=\"\">String r = new ByteBuddy()\n  .subclass(Foo.class)\n  .method(named(\"sayHelloFoo\")\n    .and(isDeclaredBy(Foo.class)\n    .and(returns(String.class))))        \n  .intercept(MethodDelegation.to(Bar.class))\n  .make()\n  .load(getClass().getClassLoader())\n  .getLoaded()\n  .newInstance()\n  .sayHelloFoo();\n         \nassertEquals(r, Bar.sayHelloBar());<\/pre>\n\n\n\n<p>\u8c03\u7528sayHelloFoo()\u65b9\u6cd5\u5b9e\u9645\u4e0a\u4f1a\u8c03\u7528sayHelloBar()\u65b9\u6cd5<\/p>\n\n\n\n<p>ByteBuddy\u600e\u4e48\u77e5\u9053\u8be5\u8c03\u7528Bar.class\u4e2d\u7684\u54ea\u4e2a\u65b9\u6cd5\uff1fByteBuddy\u6839\u636e\u65b9\u6cd5\u7b7e\u540d\u3001\u8fd4\u56de\u503c\u7c7b\u578b\u3001\u65b9\u6cd5\u540d\u3001\u6ce8\u89e3\u7684\u987a\u5e8f\u6765\u5339\u914d\u65b9\u6cd5\uff08\u8d8a\u540e\u9762\u7684\u4f18\u5148\u7ea7\u8d8a\u9ad8\uff09\u3002<\/p>\n\n\n\n<p>sayHelloFoo()\u65b9\u6cd5\u548csayHelloBar()\u65b9\u6cd5\u7684\u65b9\u6cd5\u540d\u4e0d\u4e00\u6837\uff0c\u4f46\u662f\u5b83\u4eec\u6709\u76f8\u540c\u7684\u65b9\u6cd5\u7b7e\u540d\u548c\u8fd4\u56de\u503c\u7c7b\u578b\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u5728Bar.class\u4e2d\u6709\u8d85\u8fc7\u4e00\u4e2a\u53ef\u8c03\u7528\u7684\u65b9\u6cd5\u7684\u7b7e\u540d\u548c\u8fd4\u56de\u7c7b\u578b\u4e00\u81f4\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528@BindingPriority\u6765\u89e3\u51b3\u51b2\u7a81\u3002@BindingPriority\u6709\u4e00\u4e2a\u6574\u578b\u53c2\u6570-\u8fd9\u4e2a\u503c\u8d8a\u5927\u4f18\u5148\u7ea7\u8d8a\u9ad8\u3002\u56e0\u6b64\uff0c\u5728\u4e0b\u9762\u7684\u4ee3\u7801\u7247\u6bb5\u4e2dsayHelloBar()\u65b9\u6cd5\u5c06\u4f1a\u88ab\u8c03\u7528\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=\"\">@BindingPriority(3)\npublic static String sayHelloBar() { \n    return \"Holla in Bar!\"; \n}\n \n@BindingPriority(2)\npublic static String sayBar() { \n    return \"bar\"; \n}<\/pre>\n\n\n\n<p><strong>5. \u65b9\u6cd5\u548c\u5b57\u6bb5\u5b9a\u4e49<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u6211\u4eec\u53ef\u4ee5\u5728\u6211\u4eec\u52a8\u6001\u521b\u5efa\u7684\u7c7b\u4e2d\u8986\u5199\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5\u4e86\u3002\u8ba9\u6211\u4eec\u66f4\u8fdb\u4e00\u6b65\uff0c\u5728\u6211\u4eec\u7684\u7c7b\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u65b9\u6cd5\u548c\u4e00\u4e2a\u65b0\u7684\u5b57\u6bb5\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u5c06\u4f7f\u7528java\u53cd\u5c04\u52a8\u6001\u8c03\u7528\u521b\u5efa\u7684\u65b9\u6cd5\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=\"\">Class&lt;?> type = new ByteBuddy()\n  .subclass(Object.class)\n  .name(\"MyClassName\")\n  .defineMethod(\"custom\", String.class, Modifier.PUBLIC)\n  .intercept(MethodDelegation.to(Bar.class))\n  .defineField(\"x\", String.class, Modifier.PUBLIC)\n  .make()\n  .load(\n    getClass().getClassLoader(), ClassLoadingStrategy.Default.WRAPPER)\n  .getLoaded();\n \nMethod m = type.getDeclaredMethod(\"custom\", null);\nassertEquals(m.invoke(type.newInstance()), Bar.sayHelloBar());\nassertNotNull(type.getDeclaredField(\"x\"));<\/pre>\n\n\n\n<p>\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u53eb\u505aMyClassName\u7684\u7c7b\uff0c\u5b83\u662fObject.class\u7684\u5b50\u7c7b\u3002\u7136\u540e\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u65b9\u6cd5\uff0c\u53eb\u505acustom\uff0c\u5b83\u662fpublic\u7684\uff0c\u540c\u65f6\u8fd4\u56deString\u3002<\/p>\n\n\n\n<p>\u5c31\u50cf\u4e4b\u524d\u7684\u4f8b\u5b50\uff0c\u6211\u4eec\u901a\u8fc7\u4ee3\u7406\u65b9\u6cd5\u8bf7\u6c42\u7ed9Bar.class\u5b9e\u73b0\u6211\u4eec\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p><strong>6. \u91cd\u5b9a\u4e49\u4e00\u4e2a\u5df2\u7ecf\u5b58\u5728\u7684\u7c7b<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u867d\u7136\u6211\u4eec\u53ef\u4ee5\u52a8\u6001\u521b\u5efa\u7c7b\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u64cd\u4f5c\u5df2\u7ecf\u52a0\u8f7d\u7684\u7c7b\u3002ByteBuddy\u53ef\u4ee5\u91cd\u5b9a\u4e49\u5df2\u7ecf\u5b58\u5728\u7684\u7c7b\uff0c\u7136\u540e\u4f7f\u7528ByteBuddyAgent\u5c06\u91cd\u5b9a\u4e49\u7684\u7c7b\u91cd\u65b0\u52a0\u8f7d\u5230JVM\u4e2d\u3002<\/p>\n\n\n\n<p>\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u6dfb\u52a0ByteBuddyAgent\u4f9d\u8d56\u5230pom.xml\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;dependency>\n    &lt;groupId>net.bytebuddy&lt;\/groupId>\n    &lt;artifactId>byte-buddy-agent&lt;\/artifactId>\n    &lt;version>1.7.1&lt;\/version>\n&lt;\/dependency><\/pre>\n\n\n\n<p>\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u91cd\u5b9a\u4e49\u4e4b\u524d\u6211\u4eec\u521b\u5efa\u7684Foo.sayHelloFoo()\u65b9\u6cd5\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=\"\">ByteBuddyAgent.install();\nnew ByteBuddy()\n  .redefine(Foo.class)\n  .method(named(\"sayHelloFoo\"))\n  .intercept(FixedValue.value(\"Hello Foo Redefined\"))\n  .make()\n  .load(\n    Foo.class.getClassLoader(), \n    ClassReloadingStrategy.fromInstalledAgent());\n   \nFoo f = new Foo();\n  \nassertEquals(f.sayHelloFoo(), \"Hello Foo Redefined\");<\/pre>\n\n\n\n<p><strong>7. \u603b\u7ed3<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u7cbe\u5fc3\u5236\u4f5c\u7684\u5165\u95e8\u6307\u5357\u4e2d\uff0c \u6211\u4eec\u5df2\u7ecf\u5e7f\u6cdb\u5730\u7814\u7a76\u4e86ByteBuddy\u5e93\u7684\u529f\u80fd\u4ee5\u53ca\u53ef\u4ee5\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528ByteBuddy\u52a8\u6001\u7684\u521b\u5efa\u7c7b\u3002<\/p>\n\n\n\n<p>ByteBuddy\u7684\u6587\u6863\u5bf9\u4e8e\u5185\u90e8\u5de5\u4f5c\u539f\u7406\u4ee5\u53ca\u7c7b\u5e93\u7684\u5176\u4ed6\u65b9\u9762\u63d0\u4f9b\u4e86\u66f4\u52a0\u6df1\u5165\u7684\u89e3\u91ca\u3002<\/p>\n\n\n\n<p>\u6700\u540e\uff0c\u53ef\u4ee5\u5728<a href=\"https:\/\/link.zhihu.com\/?target=https%3A\/\/github.com\/eugenp\/tutorials\/tree\/master\/libraries-5\" target=\"_blank\" rel=\"noreferrer noopener\">GitHub<\/a> \u4e0a\u627e\u5230\u8fd9\u4e2a\u6559\u7a0b\u4e2d\u5b8c\u6574\u7684\u4ee3\u7801\u7247\u6bb5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u80cc\u666f \u6700\u8fd1\u5de5\u4f5c\u4e2d\u8981\u505a\u4e00\u4e9b\u6d41\u91cf\u56de\u653e\u7684\u4e8b\u60c5\uff0c\u5176\u4e2d\u7528\u5230\u4e86\u5b57\u8282\u7801\u4fee\u6539\u76f8\u5173\u7684\u6280\u672f\uff0c\u6211\u4eec\u4f7f\u7528\u7684\u662fByteBuddy\u8fd9\u4e2a\u7c7b\u578b [&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\/9955"}],"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=9955"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/9955\/revisions"}],"predecessor-version":[{"id":9956,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/9955\/revisions\/9956"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9955"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9955"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9955"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}