{"id":18337,"date":"2025-07-06T16:32:20","date_gmt":"2025-07-06T08:32:20","guid":{"rendered":"https:\/\/92it.top\/?p=18337"},"modified":"2025-07-06T17:04:42","modified_gmt":"2025-07-06T09:04:42","slug":"java-io%e6%b5%81%e7%9a%84%e4%b8%80%e4%ba%9btips","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=18337","title":{"rendered":"Java IO\u6d41\u7684\u4e00\u4e9bTips"},"content":{"rendered":"\n<p>\u8f6c\u8f7d\uff1a<a href=\"https:\/\/mp.weixin.qq.com\/s?__biz=MzU2MDY0NDQwNQ==&amp;mid=2247483687&amp;idx=1&amp;sn=ba40ebcab271f99f308deac40943f1e4&amp;chksm=fd6e4fb3409343e99e4079ce9dd27277beaa3b1267a0394601b9aaca630617b07ae0f8a9e82c&amp;mpshare=1&amp;scene=1&amp;srcid=0705Ea84hkOTBLzxI6ye90mA&amp;sharer_shareinfo=886bef3fb34a5fbbac398de6df6ee050&amp;sharer_shareinfo_first=83f39efa955d83676a779edf9c748dbb&amp;exportkey=n_ChQIAhIQP6A2g5ESErFXN6gpo29pChL0AQIE97dBBAEAAAAAAJZeJT%2F%2F140AAAAOpnltbLcz9gKNyK89dVj0O2Id8x1CArgROsHdSRM0SFSasZAipimIAGmX1kbF5evQAYM0Jr%2FjGKd9jjmp1kFLJnaUob3C14bfpFn4JY%2BBVQYVH2yZ3iOohjdnw9YOaxtfPCz2Sq1E%2FP242P0fL59GbLznnOvF3515DQIf%2FdRkvURAzviG%2F1Cgi24zIhpY03NSosT5TeHjW9K5Flsf7cHLmnlycNlyMOZm3La5z0iqKbzLJjCeX0GDNQgrTUpV7UDHZmpNd8GSj%2BmOU7PpCkLmEj3JMPYDH5ID8U0sH4E%3D&amp;acctmode=0&amp;pass_ticket=2jFBkordv4FOEVqOGopL1XfPqSU%2B2VhjA16W6rD4vm9MFzfPNU%2Bx63HOeT16JOlU&amp;wx_header=0#rd\">Java IO\u6d41\u8be6\u89e3\uff08\u9762\u8bd5\u4e0d\u8981\u518d\u95ee\u6211IO\u6d41\uff09<\/a><\/p>\n\n\n\n<p><strong>\u6570\u636e\u6d41\u7684\u57fa\u672c\u6982\u5ff5<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u51e0\u4e4e\u6240\u6709\u7684\u7a0b\u5e8f\u90fd\u79bb\u4e0d\u5f00\u4fe1\u606f\u7684\u8f93\u5165\u548c\u8f93\u51fa\uff0c\u6bd4\u5982\u4ece\u952e\u76d8\u8bfb\u53d6\u6570\u636e\uff0c\u4ece\u6587\u4ef6\u4e2d\u83b7\u53d6\u6216\u8005\u5411\u6587\u4ef6\u4e2d\u5b58\u5165\u6570\u636e\uff0c\u5728\u663e\u793a\u5668\u4e0a\u663e\u793a\u6570\u636e\u3002\u8fd9\u4e9b\u60c5\u51b5\u4e0b\u90fd\u4f1a\u6d89\u53ca\u6709\u5173\u8f93\u5165\/\u8f93\u51fa\u7684\u5904\u7406\u3002<\/p>\n\n\n\n<p>\u5728Java\u4e2d\uff0c\u628a\u8fd9\u4e9b\u4e0d\u540c\u7c7b\u578b\u7684\u8f93\u5165\u3001\u8f93\u51fa\u6e90\u62bd\u8c61\u4e3a\u6d41\uff08Stream\uff09\uff0c\u5176\u4e2d\u8f93\u5165\u6216\u8f93\u51fa\u7684\u6570\u636e\u79f0\u4e3a\u6570\u636e\u6d41\uff08Data Stream\uff09\uff0c\u7528\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u8868\u793a\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>IO \u6d41\u7684\u5206\u7c7b<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u6570\u636e\u6d41\u662f\u6307\u4e00\u7ec4\u6709\u987a\u5e8f\u7684\u3001\u6709\u8d77\u70b9\u548c\u7ec8\u70b9\u7684\u5b57\u8282\u96c6\u5408\u3002<\/p>\n\n\n\n<ul>\n<li>\u6309\u7167\u6d41\u7684\u6d41\u5411\u5206\uff0c\u53ef\u4ee5\u5206\u4e3a\u8f93\u5165\u6d41\u548c\u8f93\u51fa\u6d41\u3002\u6ce8\u610f\uff1a\u8fd9\u91cc\u7684\u8f93\u5165\u3001\u8f93\u51fa\u662f\u9488\u5bf9\u7a0b\u5e8f\u6765\u8bf4\u7684\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8f93\u51fa\uff1a\u628a\u7a0b\u5e8f(\u5185\u5b58)\u4e2d\u7684\u5185\u5bb9\u8f93\u51fa\u5230\u78c1\u76d8\u3001\u5149\u76d8\u7b49\u5b58\u50a8\u8bbe\u5907\u4e2d\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"742\" height=\"322\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-66.png\" alt=\"\" class=\"wp-image-18339\" style=\"width:416px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-66.png 742w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-66-300x130.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-66-230x100.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-66-350x152.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-66-480x208.png 480w\" sizes=\"(max-width: 742px) 100vw, 742px\" \/><\/figure><\/div>\n\n\n<p>\u8f93\u5165\uff1a\u8bfb\u53d6\u5916\u90e8\u6570\u636e\uff08\u78c1\u76d8\u3001\u5149\u76d8\u7b49\u5b58\u50a8\u8bbe\u5907\u7684\u6570\u636e\uff09\u5230\u7a0b\u5e8f\uff08\u5185\u5b58\uff09\u4e2d\u3002<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"820\" height=\"266\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-67.png\" alt=\"\" class=\"wp-image-18340\" style=\"width:406px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-67.png 820w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-67-300x97.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-67-768x249.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-67-230x75.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-67-350x114.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-67-480x156.png 480w\" sizes=\"(max-width: 820px) 100vw, 820px\" \/><\/figure><\/div>\n\n\n<ul>\n<li>\u6309\u5904\u7406\u6570\u636e\u5355\u4f4d\u4e0d\u540c\u5206\u4e3a\u5b57\u8282\u6d41\u548c\u5b57\u7b26\u6d41\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5b57\u8282\u6d41\uff1a\u6bcf\u6b21\u8bfb\u53d6(\u5199\u51fa)\u4e00\u4e2a\u5b57\u8282\uff0c\u5f53\u4f20\u8f93\u7684\u8d44\u6e90\u6587\u4ef6\u6709\u4e2d\u6587\u65f6\uff0c\u5c31\u4f1a\u51fa\u73b0\u4e71\u7801\u3002<\/p>\n\n\n\n<p>\u5b57\u7b26\u6d41\uff1a\u6bcf\u6b21\u8bfb\u53d6(\u5199\u51fa)\u4e24\u4e2a\u5b57\u8282\uff0c\u6709\u4e2d\u6587\u65f6\uff0c\u4f7f\u7528\u8be5\u6d41\u5c31\u53ef\u4ee5\u6b63\u786e\u4f20\u8f93\u663e\u793a\u4e2d\u6587\u3002<\/p>\n\n\n\n<p>\u5904\u7406\u6d41\uff08\u5305\u88c5\u6d41\uff09\uff1a\u662f\u5bf9\u4e00\u4e2a\u5df2\u5b58\u5728\u7684\u6d41\u7684\u8fde\u63a5\u548c\u5c01\u88c5\uff0c\u901a\u8fc7\u6240\u5c01\u88c5\u7684\u6d41\u7684\u529f\u80fd\u8c03\u7528\u5b9e\u73b0\u6570\u636e\u8bfb\u5199\u3002\u5982BufferedReader\u3002\u5904\u7406\u6d41\u7684\u6784\u9020\u65b9\u6cd5\u603b\u662f\u8981\u5e26\u4e00\u4e2a\u5176\u4ed6\u7684\u6d41\u5bf9\u8c61\u505a\u53c2\u6570\u3002\u4e00\u4e2a\u6d41\u5bf9\u8c61\u7ecf\u8fc7\u5176\u4ed6\u6d41\u7684\u591a\u6b21\u5305\u88c5\uff0c\u79f0\u4e3a\u6d41\u7684\u94fe\u63a5\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>Java IO \u6d41\u7684\u7c7b\u56fe<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Java IO \u6d41\u67094\u4e2a\u62bd\u8c61\u57fa\u7c7b\uff1a<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"766\" height=\"390\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-68.png\" alt=\"\" class=\"wp-image-18342\" style=\"width:414px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-68.png 766w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-68-300x153.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-68-230x117.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-68-350x178.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-68-480x244.png 480w\" sizes=\"(max-width: 766px) 100vw, 766px\" \/><\/figure><\/div>\n\n\n<p>\u5176\u4ed6\u6d41\u90fd\u662f\u7ee7\u627f\u4e8e\u8fd9\u56db\u5927\u57fa\u7c7b\u7684\u3002\u4e0b\u56fe\u662fJava IO \u6d41\u7684\u6574\u4f53\u67b6\u6784\u56fe\uff1a<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"948\" height=\"1024\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69-948x1024.png\" alt=\"\" class=\"wp-image-18343\" style=\"width:492px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69-948x1024.png 948w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69-278x300.png 278w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69-768x830.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69-830x897.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69-230x249.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69-350x378.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69-480x519.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-69.png 1340w\" sizes=\"(max-width: 948px) 100vw, 948px\" \/><\/figure><\/div>\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>IO \u6d41\u7684\u9009\u62e9<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u77e5\u9053\u4e86 IO \u6d41\u6709\u8fd9\u4e48\u591a\u5206\u7c7b\uff0c\u90a3\u6211\u4eec\u5728\u4f7f\u7528\u7684\u65f6\u5019\u5e94\u8be5\u600e\u4e48\u9009\u62e9\u5462\uff1f\u6bd4\u5982\u4ec0\u4e48\u65f6\u5019\u7528\u8f93\u51fa\u6d41\uff1f\u4ec0\u4e48\u65f6\u5019\u7528\u5b57\u8282\u6d41\uff1f\u53ef\u4ee5\u6839\u636e\u4e0b\u9762\u4e09\u6b65\u9009\u62e9\u9002\u5408\u81ea\u5df1\u7684\u6d41\uff1a<\/p>\n\n\n\n<ul>\n<li>\u9996\u5148\u81ea\u5df1\u8981\u77e5\u9053\u662f\u9009\u62e9\u8f93\u5165\u6d41\u8fd8\u662f\u8f93\u51fa\u6d41\u3002\u8fd9\u5c31\u8981\u6839\u636e\u81ea\u5df1\u7684\u60c5\u51b5\u51b3\u5b9a\uff0c\u5982\u679c\u60f3\u4ece\u7a0b\u5e8f\u5199\u4e1c\u897f\u5230\u522b\u7684\u5730\u65b9\uff0c\u90a3\u4e48\u5c31\u9009\u62e9\u8f93\u5165\u6d41\uff0c\u53cd\u4e4b\u5c31\u9009\u8f93\u51fa\u6d41\uff1b<\/li>\n\n\n\n<li>\u7136\u540e\u8003\u8651\u4f60\u4f20\u8f93\u6570\u636e\u65f6\uff0c\u662f\u6bcf\u6b21\u4f20\u4e00\u4e2a\u5b57\u8282\u8fd8\u662f\u4e24\u4e2a\u5b57\u8282\uff0c\u6bcf\u6b21\u4f20\u8f93\u4e00\u4e2a\u5b57\u8282\u5c31\u9009\u5b57\u8282\u6d41\uff0c\u5982\u679c\u5b58\u5728\u4e2d\u6587\uff0c\u90a3\u80af\u5b9a\u5c31\u8981\u9009\u5b57\u7b26\u6d41\u4e86\u3002<\/li>\n\n\n\n<li>\u901a\u8fc7\u524d\u9762\u4e24\u6b65\u5c31\u53ef\u4ee5\u9009\u51fa\u4e00\u4e2a\u5408\u9002\u7684\u8282\u70b9\u6d41\u4e86\uff0c\u6bd4\u5982\u5b57\u8282\u8f93\u5165\u6d41 InputStream\uff0c\u5982\u679c\u8981\u5728\u6b64\u57fa\u7840\u4e0a\u589e\u5f3a\u529f\u80fd\uff0c\u90a3\u4e48\u5c31\u5728\u5904\u7406\u6d41\u4e2d\u9009\u62e9\u4e00\u4e2a\u5408\u9002\u7684\u5373\u53ef\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong> Java\u4e71\u7801\u7684\u6839\u672c\u539f\u56e0<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>\u4e71\u7801\u7684\u6838\u5fc3\u539f\u56e0\uff1a\u7f16\u7801\u4e0e\u89e3\u7801\u4e0d\u5339\u914d<\/strong><\/p>\n\n\n\n<p>\u4e71\u7801\u7684\u6839\u672c\u539f\u56e0\u662f\uff1a<br><strong>\u5199\u5165\u65f6\u4f7f\u7528\u7684\u7f16\u7801\u65b9\u5f0f \u2260 \u8bfb\u53d6\u65f6\u4f7f\u7528\u7684\u89e3\u7801\u65b9\u5f0f<\/strong><\/p>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul>\n<li>\u5199\u5165\u65f6\u7528 UTF-8 \u7f16\u7801<code>\"\u4f60\u597d\"<\/code>\uff0c\u8bfb\u53d6\u65f6\u7528 GBK \u89e3\u7801 \u2192 \u4e71\u7801\u3002<\/li>\n\n\n\n<li>\u5199\u5165\u65f6\u7528 GBK \u7f16\u7801\uff0c\u8bfb\u53d6\u65f6\u7528 UTF-8 \u89e3\u7801 \u2192 \u4e71\u7801\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u4e71\u7801\u53ef\u80fd\u53d1\u751f\u5728\u5199\u5165\u9636\u6bb5\u5417\uff1f<\/strong><\/p>\n\n\n\n<ul>\n<li>\u4e25\u683c\u6765\u8bf4\uff0c\u5199\u5165\u9636\u6bb5\u672c\u8eab\u4e0d\u4f1a\u76f4\u63a5\u4ea7\u751f\u4e71\u7801\uff0c\u56e0\u4e3a\u6570\u636e\u662f\u4ee5\u5b57\u8282\u5f62\u5f0f\u5199\u5165\u6587\u4ef6\u7684\uff0c\u800c\u4e71\u7801\u662f\u300c\u5b57\u8282\u8f6c\u5b57\u7b26\u300d\u65f6\u7684\u89e3\u7801\u9519\u8bef\u3002<\/li>\n\n\n\n<li>\u4f46\u9519\u8bef\u7684\u7f16\u7801\u65b9\u5f0f\u4f1a\u4e3a\u540e\u7eed\u8bfb\u53d6\u57cb\u4e0b\u4e71\u7801\u9690\u60a3\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u4e71\u7801\u66f4\u5e38\u53d1\u751f\u5728\u8bfb\u53d6\u9636\u6bb5<\/strong><\/p>\n\n\n\n<p>\u8bfb\u53d6\u9636\u6bb5\u4e71\u7801\u7684\u5178\u578b\u573a\u666f<\/p>\n\n\n\n<ul>\n<li>\u573a\u666f 1\uff1a\u6587\u4ef6\u7f16\u7801\u4e0e\u8bfb\u53d6\u7f16\u7801\u4e0d\u5339\u914d<br>\u4f8b\uff1a\u6587\u4ef6\u662f UTF-8 \u7f16\u7801\uff0c\u4f46\u7528 GBK \u89e3\u7801\uff1a<\/li>\n<\/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=\"\">\/\/ \u9519\u8bef\uff1a\u7528GBK\u89e3\u7801UTF-8\u6587\u4ef6\nBufferedReader reader = new BufferedReader(new FileReader(\"file.txt\", StandardCharsets.GBK));\n\n<\/pre>\n\n\n\n<p>\u7ed3\u679c\uff1a<code>\"\u4f60\u597d\"<\/code>\u53ef\u80fd\u663e\u793a\u4e3a<code>\"\u6d63\u72b2\u30bd\"<\/code>\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u573a\u666f 2\uff1a\u672a\u663e\u5f0f\u6307\u5b9a\u7f16\u7801\uff0c\u4f9d\u8d56\u7cfb\u7edf\u9ed8\u8ba4\u7f16\u7801<\/strong><br>\u4f8b\uff1a\u5728 Windows\uff08\u9ed8\u8ba4 GBK\uff09\u4e2d\u8bfb\u53d6 UTF-8 \u6587\u4ef6\uff0c\u4e14\u672a\u6307\u5b9a\u7f16\u7801\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=\"\">\/\/ \u9690\u5f0f\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u7f16\u7801\uff08GBK\uff09\u89e3\u7801UTF-8\u6587\u4ef6\nBufferedReader reader = new BufferedReader(new FileReader(\"file.txt\"));<\/pre>\n\n\n\n<p>\u7ed3\u679c\uff1a\u5fc5\u7136\u4e71\u7801\uff0c\u56e0\u4e3a\u89e3\u7801\u89c4\u5219\u4e0e\u6587\u4ef6\u5b9e\u9645\u7f16\u7801\u4e0d\u5339\u914d\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u6848\u4f8b\uff1a\u4e71\u7801\u7684\u5b8c\u6574\u6d41\u7a0b\u6f14\u793a<\/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=\"\">\/ \u5199\u5165\u9636\u6bb5\uff08UTF-8\u7f16\u7801\uff09\ntry (FileOutputStream fos = new FileOutputStream(\"test.txt\")) {\n    fos.write(\"\u4f60\u597d\".getBytes(StandardCharsets.UTF_8));\n}\n\n\/\/ \u8bfb\u53d6\u9636\u6bb5\uff08\u9519\u8bef\u4f7f\u7528GBK\u89e3\u7801\uff09\ntry (FileInputStream fis = new FileInputStream(\"test.txt\")) {\n    byte[] bytes = fis.readAllBytes();\n    String text = new String(bytes, StandardCharsets.GBK); \/\/ \u4e71\u7801\uff01\n    System.out.println(text); \/\/ \u8f93\u51fa\uff1a\u6d63\u72b2\u30bd\n}<\/pre>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p>\u5982\u4f55\u907f\u514d\u4e71\u7801\uff1f\u6838\u5fc3\u539f\u5219<\/p>\n\n\n\n<ol>\n<li><strong>\u5199\u5165\u65f6\u663e\u5f0f\u6307\u5b9a\u7f16\u7801<\/strong>\uff1a\n<ul>\n<li>\u5b57\u8282\u6d41\uff1a<code>getBytes(\"UTF-8\")<\/code><\/li>\n\n\n\n<li>\u5b57\u7b26\u6d41\uff1a<code>new FileWriter(\"file.txt\", StandardCharsets.UTF_8)<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8bfb\u53d6\u65f6\u4f7f\u7528\u4e0e\u5199\u5165\u76f8\u540c\u7684\u7f16\u7801<\/strong>\uff1a\n<ul>\n<li>\u5b57\u8282\u6d41\uff1a<code>new String(bytes, \"UTF-8\")<\/code><\/li>\n\n\n\n<li>\u5b57\u7b26\u6d41\uff1a<code>new FileReader(\"file.txt\", StandardCharsets.UTF_8)<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8de8\u5e73\u53f0\u573a\u666f\u5f3a\u5236\u6307\u5b9a UTF-8 \u7f16\u7801<\/strong>\uff1a\n<ul>\n<li>\u907f\u514d\u4f9d\u8d56\u7cfb\u7edf\u9ed8\u8ba4\u7f16\u7801\uff08\u5982 Windows \u7684 GBK\u3001Mac \u7684 UTF-8\uff09\uff0c\u7edf\u4e00\u4f7f\u7528 UTF-8 \u4fdd\u8bc1\u517c\u5bb9\u6027\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p>\u603b\u7ed3\uff1a\u4e71\u7801\u7684\u53d1\u751f\u9636\u6bb5<\/p>\n\n\n\n<ul>\n<li><strong>\u4e71\u7801\u7684\u76f4\u63a5\u8868\u73b0<\/strong>\uff1a\u53d1\u751f\u5728\u8bfb\u53d6\u9636\u6bb5\uff08\u89e3\u7801\u65f6\uff09\u3002<\/li>\n\n\n\n<li><strong>\u4e71\u7801\u7684\u6839\u672c\u539f\u56e0<\/strong>\uff1a\u5199\u5165\u65f6\u7684\u7f16\u7801\u4e0e\u8bfb\u53d6\u65f6\u7684\u89e3\u7801\u4e0d\u5339\u914d\uff0c\u56e0\u6b64\u5199\u5165\u9636\u6bb5\u7684\u7f16\u7801\u9009\u62e9\u662f\u4e71\u7801\u7684\u300c\u6e90\u5934\u300d\uff0c\u8bfb\u53d6\u9636\u6bb5\u7684\u89e3\u7801\u9519\u8bef\u662f\u4e71\u7801\u7684\u300c\u8868\u73b0\u300d\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u6838\u5fc3\u7ed3\u8bba<\/strong>\uff1a\u4e71\u7801\u662f\u7f16\u7801\u548c\u89e3\u7801\u4e0d\u5339\u914d\u7684\u7ed3\u679c\uff0c\u9700\u8981\u5728\u5199\u5165\u548c\u8bfb\u53d6\u9636\u6bb5\u540c\u65f6\u4fdd\u8bc1\u7f16\u7801\u4e00\u81f4\uff0c\u624d\u80fd\u5f7b\u5e95\u907f\u514d\u3002<\/p>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p>\u5728 Java \u4e2d\uff0c\u4f7f\u7528\u5b57\u8282\u6d41\u5199\u6587\u4ef6\u65f6<strong>\u662f\u5426\u9700\u8981\u6307\u5b9a\u7f16\u7801<\/strong>\uff1f<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5b57\u8282\u6d41\uff08\u5982<code>FileOutputStream<\/code>\uff09\u7684\u6838\u5fc3\u4f5c\u7528\u662f<strong>\u76f4\u63a5\u64cd\u4f5c\u4e8c\u8fdb\u5236\u5b57\u8282<\/strong>\uff0c\u5b83\u4e0d\u5173\u5fc3\u6570\u636e\u7684\u300c\u5b57\u7b26\u542b\u4e49\u300d\uff0c\u53ea\u8d1f\u8d23\u6309\u5b57\u8282\u5e8f\u5217\u5199\u5165\u6587\u4ef6\u3002<\/p>\n\n\n\n<ul>\n<li>\u4f8b\u5982\uff1a\u5199\u5165<code>int a = 65<\/code>\uff0c\u5b57\u8282\u6d41\u4f1a\u76f4\u63a5\u5199\u5165<code>0x41<\/code>\uff08ASCII \u4e2d &#8216;A&#8217; \u7684\u5b57\u8282\u503c\uff09\u3002<\/li>\n\n\n\n<li>\u5173\u952e\uff1a<strong>\u5b57\u8282\u6d41\u672c\u8eab\u4e0d\u6d89\u53ca\u7f16\u7801\u8f6c\u6362<\/strong>\uff0c\u7f16\u7801\u662f\u300c\u5b57\u7b26\u2192\u5b57\u8282\u300d\u8f6c\u6362\u65f6\u7684\u89c4\u5219\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u4e3a\u4ec0\u4e48\u5904\u7406\u5b57\u7b26\u6570\u636e\u65f6\u9700\u8981\u6307\u5b9a\u7f16\u7801\uff1f<\/strong><\/p>\n\n\n\n<p>\u5f53\u4f60\u9700\u8981\u5199\u5165\u300c\u5b57\u7b26\u6570\u636e\u300d\uff08\u5982<code>String<\/code>\uff09\u65f6\uff0c\u5fc5\u987b\u5148\u5c06\u5b57\u7b26\u8f6c\u6362\u4e3a\u5b57\u8282\u5e8f\u5217\uff0c\u800c\u8fd9\u4e2a\u8f6c\u6362\u8fc7\u7a0b<strong>\u5fc5\u987b\u6307\u5b9a\u7f16\u7801<\/strong>\uff0c\u5426\u5219\u4f1a\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u7f16\u7801\uff0c\u53ef\u80fd\u5bfc\u81f4\u95ee\u9898\uff1a<\/p>\n\n\n\n<p>1.&nbsp;\u5b57\u7b26\u2192\u5b57\u8282\u7684\u8f6c\u6362\u5fc5\u987b\u4f9d\u8d56\u7f16\u7801\u89c4\u5219<\/p>\n\n\n\n<ul>\n<li>\u4f8b\uff1a\u5b57\u7b26<code>\"\u4f60\"<\/code>\u5728\u4e0d\u540c\u7f16\u7801\u4e0b\u7684\u5b57\u8282\u8868\u793a\u4e0d\u540c\uff1a\n<ul>\n<li>UTF-8\uff1a<code>0xE4 0xBD 0xA0<\/code>\uff083 \u5b57\u8282\uff09<\/li>\n\n\n\n<li>GBK\uff1a<code>0xC4 0xE3<\/code>\uff082 \u5b57\u8282\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u82e5\u4e0d\u6307\u5b9a\u7f16\u7801\uff0c<code>String.getBytes()<\/code>\u4f1a\u4f7f\u7528<strong>\u7cfb\u7edf\u9ed8\u8ba4\u7f16\u7801<\/strong>\uff08\u5982 Windows \u9ed8\u8ba4 GBK\uff0cLinux \u9ed8\u8ba4 UTF-8\uff09\uff0c\u53ef\u80fd\u5bfc\u81f4\uff1a\n<ul>\n<li>\u8de8\u5e73\u53f0\u65f6\u6587\u4ef6\u7f16\u7801\u4e0d\u4e00\u81f4\uff0c\u8bfb\u53d6\u65f6\u4e71\u7801\u3002<\/li>\n\n\n\n<li>\u65e0\u6cd5\u9884\u77e5\u6587\u4ef6\u7684\u5b9e\u9645\u7f16\u7801\uff0c\u589e\u52a0\u7ef4\u62a4\u6210\u672c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>2.&nbsp;\u793a\u4f8b\uff1a\u4e0d\u6307\u5b9a\u7f16\u7801\u7684\u98ce\u9669<\/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=\"\">try (FileOutputStream fos = new FileOutputStream(\"test.txt\")) {\n    String text = \"\u4f60\u597d\";\n    fos.write(text.getBytes()); \/\/ \u9690\u5f0f\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u7f16\u7801\n}<\/pre>\n\n\n\n<p>\u95ee\u9898\uff1a\u82e5\u5728 Windows\uff08GBK\uff09\u5199\u5165\uff0c\u5728 Linux\uff08UTF-8\uff09\u4e2d\u7528 UTF-8 \u8bfb\u53d6\uff0c\u5fc5\u7136\u4e71\u7801\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\u4ec0\u4e48\u60c5\u51b5\u4e0b\u53ef\u4ee5\u4e0d\u6307\u5b9a\u7f16\u7801\uff1f<\/p>\n\n\n\n<p>\u5f53\u4f60\u64cd\u4f5c\u7684\u662f<strong>\u975e\u5b57\u7b26\u6570\u636e<\/strong>\uff08\u5982\u56fe\u7247\u3001\u97f3\u9891\u3001\u4e8c\u8fdb\u5236\u6587\u4ef6\uff09\u65f6\uff0c\u4e0d\u9700\u8981\u8003\u8651\u7f16\u7801\uff0c\u56e0\u4e3a\uff1a<\/p>\n\n\n\n<ul>\n<li>\u8fd9\u4e9b\u6570\u636e\u672c\u8eab\u5c31\u662f\u5b57\u8282\u5e8f\u5217\uff0c\u65e0\u9700\u300c\u5b57\u7b26\u2192\u5b57\u8282\u300d\u7684\u8f6c\u6362\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u4f8b\uff1a\u590d\u5236\u56fe\u7247\u6587\u4ef6\u65f6\uff0c\u76f4\u63a5\u8bfb\u53d6\u5b57\u8282\u5e76\u5199\u5165\u5373\u53ef\uff1a<\/li>\n<\/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=\"\">try (FileInputStream fis = new FileInputStream(\"image.jpg\");\n     FileOutputStream fos = new FileOutputStream(\"image_copy.jpg\")) {\n     byte[] buffer = new byte[1024];\n     int len;\n     while ((len = fis.read(buffer)) != -1) {\n         fos.write(buffer, 0, len);\n     }\n }<\/pre>\n\n\n\n<p><strong>\u6ce8\u610f<\/strong>\uff1a\u6b64\u65f6\u64cd\u4f5c\u7684\u662f\u539f\u59cb\u5b57\u8282\uff0c\u4e0e\u7f16\u7801\u65e0\u5173\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u603b\u7ed3\uff1a\u662f\u5426\u9700\u8981\u6307\u5b9a\u7f16\u7801\u7684\u6838\u5fc3\u903b\u8f91<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>\u573a\u666f<\/th><th>\u662f\u5426\u9700\u8981\u6307\u5b9a\u7f16\u7801<\/th><th>\u539f\u56e0<\/th><\/tr><\/thead><tbody><tr><td>\u5199\u5165\u5b57\u7b26\u6570\u636e\uff08String\uff09<\/td><td><strong>\u5fc5\u987b\u663e\u5f0f\u6307\u5b9a\u7f16\u7801<\/strong><\/td><td>\u5b57\u7b26\u2192\u5b57\u8282\u7684\u8f6c\u6362\u9700\u8981\u660e\u786e\u89c4\u5219\uff0c\u907f\u514d\u4f9d\u8d56\u7cfb\u7edf\u9ed8\u8ba4\u7f16\u7801\u5bfc\u81f4\u4e71\u7801\u6216\u517c\u5bb9\u6027\u95ee\u9898\u3002<\/td><\/tr><tr><td>\u5199\u5165\u539f\u59cb\u5b57\u8282\u6570\u636e<\/td><td><strong>\u65e0\u9700\u6307\u5b9a\u7f16\u7801<\/strong><\/td><td>\u76f4\u63a5\u64cd\u4f5c\u5b57\u8282\u5e8f\u5217\uff0c\u4e0d\u6d89\u53ca\u5b57\u7b26\u8f6c\u6362\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u6700\u4f73\u5b9e\u8df5\uff1a\u663e\u5f0f\u6307\u5b9a\u7f16\u7801\uff0c\u907f\u514d\u9690\u60a3<\/strong><\/p>\n\n\n\n<p>\u5373\u4f7f\u662f\u5904\u7406\u5b57\u7b26\u6570\u636e\uff0c\u4e5f\u5efa\u8bae\u59cb\u7ec8\u663e\u5f0f\u6307\u5b9a\u7f16\u7801\uff0c\u4f8b\u5982\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=\"\">try (FileOutputStream fos = new FileOutputStream(\"test.txt\")) {\n    String text = \"\u4f60\u597d\";\n    fos.write(text.getBytes(StandardCharsets.UTF_8)); \/\/ \u663e\u5f0f\u6307\u5b9aUTF-8\u7f16\u7801\n}\n\n<\/pre>\n\n\n\n<p>\u8fd9\u6837\u505a\u7684\u597d\u5904\uff1a<\/p>\n\n\n\n<ul>\n<li>\u660e\u786e\u6587\u4ef6\u7684\u7f16\u7801\u683c\u5f0f\uff0c\u4fbf\u4e8e\u540e\u7eed\u8bfb\u53d6\u65f6\u4f7f\u7528\u76f8\u540c\u7f16\u7801\uff0c\u907f\u514d\u4e71\u7801\u3002<\/li>\n\n\n\n<li>\u8de8\u5e73\u53f0\u573a\u666f\u4e0b\u4fdd\u8bc1\u7f16\u7801\u4e00\u81f4\u6027\uff08UTF-8 \u662f\u901a\u7528\u7f16\u7801\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u5173\u952e\u7ed3\u8bba<\/strong><\/p>\n\n\n\n<ul>\n<li>\u5b57\u8282\u6d41\u672c\u8eab\u4e0d\u5904\u7406\u7f16\u7801\uff0c\u7f16\u7801\u662f\u300c\u5b57\u7b26\u2192\u5b57\u8282\u300d\u8f6c\u6362\u65f6\u7684\u89c4\u5219\u3002<\/li>\n\n\n\n<li>\u5f53\u5199\u5165\u5b57\u7b26\u6570\u636e\u65f6\uff0c<strong>\u5fc5\u987b\u6307\u5b9a\u7f16\u7801<\/strong>\uff0c\u5426\u5219\u4f1a\u4f7f\u7528\u7cfb\u7edf\u9ed8\u8ba4\u7f16\u7801\uff0c\u53ef\u80fd\u5bfc\u81f4\u540e\u7eed\u8bfb\u53d6\u65f6\u4e71\u7801\u6216\u517c\u5bb9\u6027\u95ee\u9898\u3002<\/li>\n\n\n\n<li>\u5f53\u5199\u5165\u539f\u59cb\u5b57\u8282\u6570\u636e\uff08\u975e\u5b57\u7b26\uff09\u65f6\uff0c\u65e0\u9700\u8003\u8651\u7f16\u7801\uff0c\u76f4\u63a5\u64cd\u4f5c\u5b57\u8282\u5373\u53ef\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p><strong>\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u53ea\u7528\u5b57\u8282\u6d41\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5b57\u8282\u6d41\u786e\u5b9e\u53ef\u4ee5\u5199\u4efb\u4f55\u6587\u4ef6\uff08\u5305\u62ec\u6587\u672c\uff09\uff0c\u4f46\u5904\u7406\u6587\u672c\u65f6\u5b58\u5728\u4e24\u5927\u81f4\u547d\u95ee\u9898\uff1a<\/p>\n\n\n\n<p>&nbsp;\u7f16\u7801\u590d\u6742\u6027\uff08\u624b\u52a8\u5904\u7406\u7f16\u7801\u6613\u51fa\u9519\uff09<\/p>\n\n\n\n<ul>\n<li>\u793a\u4f8b\uff1a\u7528\u5b57\u8282\u6d41\u5199\u5165\u4e2d\u6587<\/li>\n<\/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=\"\">try (FileOutputStream fos = new FileOutputStream(\"test.txt\")) {\n    String text = \"\u4f60\u597d\";\n    \/\/ \u5fc5\u987b\u624b\u52a8\u6307\u5b9a\u7f16\u7801\uff0c\u5426\u5219\u9ed8\u8ba4\u7528\u7cfb\u7edf\u7f16\u7801\uff08\u5982Windows\u7684GBK\uff09\n    fos.write(text.getBytes(\"UTF-8\")); \n}<\/pre>\n\n\n\n<p><strong>\u95ee\u9898<\/strong>\uff1a\u82e5\u4e0d\u6307\u5b9a\u7f16\u7801\uff08\u5982<code>getBytes()<\/code>\uff09\uff0c\u5728\u4e0d\u540c\u7cfb\u7edf\u4e0a\u53ef\u80fd\u4f7f\u7528\u4e0d\u540c\u9ed8\u8ba4\u7f16\u7801\uff08\u5982 Windows \u7684 GBK\u3001Linux \u7684 UTF-8\uff09\uff0c\u5bfc\u81f4\u8de8\u5e73\u53f0\u4e71\u7801\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u64cd\u4f5c\u4f4e\u6548\uff08\u9700\u9891\u7e41\u5904\u7406\u5b57\u8282\u7ec6\u8282\uff09<\/strong><\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u7528\u5b57\u8282\u6d41\u9010\u884c\u5199\u5165\u6587\u672c<\/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=\"\">try (FileOutputStream fos = new FileOutputStream(\"test.txt\")) {\n    String line1 = \"\u7b2c\u4e00\u884c\";\n    String line2 = \"\u7b2c\u4e8c\u884c\";\n    \/\/ \u5199\u5165\u7b2c\u4e00\u884c + \u6362\u884c\u7b26\uff08\u9700\u624b\u52a8\u5904\u7406\u5b57\u8282\uff09\n    fos.write(line1.getBytes(\"UTF-8\"));\n    fos.write(\"\\n\".getBytes(\"UTF-8\")); \/\/ \u624b\u52a8\u6dfb\u52a0\u6362\u884c\u7b26\u7684\u5b57\u8282\n    fos.write(line2.getBytes(\"UTF-8\"));\n}\n\n<\/pre>\n\n\n\n<p><strong>\u95ee\u9898<\/strong>\uff1a\u9700\u9891\u7e41\u5c06\u5b57\u7b26\u4e32\u8f6c\u5b57\u8282\u6570\u7ec4\uff0c\u624b\u52a8\u5904\u7406\u6362\u884c\u7b26\uff08<code>\\n<\/code>\uff09\uff0c\u4ee3\u7801\u5197\u4f59\u4e14\u6613\u51fa\u9519\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u5b57\u7b26\u6d41\u7684 \u201c\u6551\u8d4e\u201d\uff1a\u81ea\u52a8\u5904\u7406\u7f16\u7801\u548c\u6587\u672c\u64cd\u4f5c<\/strong><\/p>\n\n\n\n<p>\u81ea\u52a8\u7f16\u7801\u8f6c\u6362\uff08\u65e0\u9700\u624b\u52a8\u5904\u7406\u5b57\u8282\uff09<\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u7528\u5b57\u7b26\u6d41\u5199\u5165\u4e2d\u6587<\/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=\"\">try (FileWriter writer = new FileWriter(\"test.txt\")) {\n    writer.write(\"\u4f60\u597d\"); \/\/ \u81ea\u52a8\u6309UTF-8\u7f16\u7801\u5199\u5165\uff0c\u65e0\u9700\u624b\u52a8\u8f6c\u5b57\u8282\n}<\/pre>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u9ad8\u5c42\u6587\u672c\u64cd\u4f5c\uff08\u7b80\u5316\u4ee3\u7801\uff09<\/strong><\/p>\n\n\n\n<p>\u793a\u4f8b\uff1a\u7528\u5b57\u7b26\u6d41\u9010\u884c\u5199\u5165\u6587\u672c<\/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=\"\">try (BufferedWriter writer = new BufferedWriter(new FileWriter(\"test.txt\"))) {\n    writer.write(\"\u7b2c\u4e00\u884c\");\n    writer.newLine(); \/\/ \u81ea\u52a8\u6dfb\u52a0\u7cfb\u7edf\u65e0\u5173\u7684\u6362\u884c\u7b26\uff08Windows\u662f\\r\\n\uff0cLinux\u662f\\n\uff09\n    writer.write(\"\u7b2c\u4e8c\u884c\");\n}<\/pre>\n\n\n\n<p><strong>\u4f18\u52bf<\/strong>\uff1a\u76f4\u63a5\u4f7f\u7528<code>newLine()<\/code>\u65b9\u6cd5\u6dfb\u52a0\u6362\u884c\u7b26\uff0c\u65e0\u9700\u5173\u5fc3\u5e95\u5c42\u5b57\u8282\u7ec6\u8282\uff0c\u4ee3\u7801\u66f4\u7b80\u6d01\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u751f\u6d3b\u5316\u7c7b\u6bd4<\/strong><\/p>\n\n\n\n<ul>\n<li>\u573a\u666f\uff1a\u4f60\u8981\u5199\u4e00\u7bc7\u6563\u6587\uff0c\u6709\u4e24\u79cd\u65b9\u5f0f\uff1a\n<ol>\n<li>\u5b57\u8282\u6d41\u65b9\u5f0f\uff1a\n<ul>\n<li>\u5148\u7528\u7b14\u628a\u6bcf\u4e2a\u6c49\u5b57\u62c6\u89e3\u6210\u7b14\u753b\uff08\u5982 \u201c\u4f60\u201d \u62c6\u6210\u4e3f\u4e28\u4e3f\u4e5b\u4e28\u30ce\u4e36\uff09\u3002<\/li>\n\n\n\n<li>\u518d\u6309\u7279\u5b9a\u987a\u5e8f\uff08\u5982 UTF-8 \u7f16\u7801\u89c4\u5219\uff09\u6392\u5217\u8fd9\u4e9b\u7b14\u753b\u3002<\/li>\n\n\n\n<li>\u6700\u540e\u9010\u7b14\u5199\u5728\u7eb8\u4e0a\u3002<\/li>\n\n\n\n<li><strong>\u7ed3\u679c<\/strong>\uff1a\u80fd\u5b8c\u6210\uff0c\u4f46\u6548\u7387\u6781\u4f4e\uff0c\u4e14\u5bb9\u6613\u5199\u9519\uff08\u6bd4\u5982\u628a \u201c\u4f60\u201d \u5199\u6210 \u201c\u5c14\u201d\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5b57\u7b26\u6d41\u65b9\u5f0f\uff1a\n<ul>\n<li>\u76f4\u63a5\u7528\u952e\u76d8\u6572\u5165\u6c49\u5b57\uff08\u5982 \u201c\u4f60\u201d\uff09\u3002<\/li>\n\n\n\n<li>\u7535\u8111\u81ea\u52a8\u6309 UTF-8 \u7f16\u7801\u8f6c\u6362\u4e3a\u4e8c\u8fdb\u5236\u5b58\u50a8\u3002<\/li>\n\n\n\n<li><strong>\u7ed3\u679c<\/strong>\uff1a\u9ad8\u6548\u4e14\u4e0d\u6613\u51fa\u9519\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/li>\n\n\n\n<li>\u7ed3\u8bba\uff1a<br>\u5904\u7406\u6587\u672c\u65f6\uff0c\u5b57\u7b26\u6d41\u7684\u62bd\u8c61\u5c42\u7ea7\u66f4\u9ad8\uff0c\u5c4f\u853d\u4e86\u5e95\u5c42\u7f16\u7801\u7ec6\u8282\uff0c\u5c31\u50cf\u7528\u9ad8\u7ea7\u8bed\u8a00\u7f16\u7a0b\u4e00\u6837\uff0c\u8ba9\u4f60\u4e13\u6ce8\u4e8e\u5185\u5bb9\u800c\u975e\u5b9e\u73b0\u7ec6\u8282\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>IO\u7f13\u51b2\u6d41<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"271\" src=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71-1024x271.png\" alt=\"\" class=\"wp-image-18350\" style=\"width:534px;height:auto\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71-1024x271.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71-300x79.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71-768x203.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71-830x219.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71-230x61.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71-350x93.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71-480x127.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2025\/07\/image-71.png 1180w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>\u7f13\u51b2\u6d41\uff08Buffered Stream\uff09\u662f Java IO \u4e2d\u7528\u4e8e\u63d0\u9ad8\u8bfb\u5199\u6548\u7387\u7684<strong>\u88c5\u9970\u5668\u6d41<\/strong>\uff0c\u5b83\u901a\u8fc7\u5728\u5185\u5b58\u4e2d\u521b\u5efa\u7f13\u51b2\u533a\uff08Buffer\uff09\uff0c\u51cf\u5c11\u4e0e\u5e95\u5c42\u6570\u636e\u6e90\uff08\u5982\u78c1\u76d8\u3001\u7f51\u7edc\uff09\u7684\u76f4\u63a5\u4ea4\u4e92\u6b21\u6570\uff0c\u4ece\u800c\u663e\u8457\u63d0\u5347\u6027\u80fd\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7f13\u51b2\u6d41\u7684\u6838\u5fc3\u4f5c\u7528\uff1a\u51cf\u5c11 IO \u6b21\u6570<\/strong><\/p>\n\n\n\n<p><strong>\u4f20\u7edf IO \u7684\u75db\u70b9\uff1a\u9891\u7e41\u8bbf\u95ee\u5e95\u5c42\u8d44\u6e90<\/strong><\/p>\n\n\n\n<ul>\n<li>\u666e\u901a\u6d41\uff08\u5982<code>FileInputStream<\/code>\uff09\u6bcf\u6b21\u8bfb\u5199\u64cd\u4f5c\u90fd\u4f1a\u76f4\u63a5\u8c03\u7528\u64cd\u4f5c\u7cfb\u7edf\u7684 IO \u63a5\u53e3\uff0c\u4f8b\u5982\uff1a<\/li>\n<\/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=\"\">try (FileInputStream fis = new FileInputStream(\"data.txt\")) {\n    int data;\n    while ((data = fis.read()) != -1) { \/\/ \u6bcf\u6b21\u8bfb\u53d61\u4e2a\u5b57\u8282\uff0c\u8c03\u75281\u6b21\u7cfb\u7edfIO\n        \/\/ \u5904\u7406\u6570\u636e\n    }\n}<\/pre>\n\n\n\n<p>\u95ee\u9898\uff1a\u82e5\u6587\u4ef6\u6709 1000 \u5b57\u8282\uff0c\u9700\u8c03\u7528 1000 \u6b21\u7cfb\u7edf IO\uff0c\u5f00\u9500\u6781\u5927\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7f13\u51b2\u6d41\u7684\u89e3\u51b3\u65b9\u6848\uff1a\u6279\u91cf\u8bfb\u5199<\/strong><\/p>\n\n\n\n<ul>\n<li>\u7f13\u51b2\u6d41\uff08\u5982<code>BufferedInputStream<\/code>\uff09\u5728\u5185\u5b58\u4e2d\u7ef4\u62a4\u4e00\u4e2a\u7f13\u51b2\u533a\uff08\u9ed8\u8ba4 8KB\uff09\uff0c\u6bcf\u6b21\u4ece\u6570\u636e\u6e90\u8bfb\u53d6\u4e00\u5927\u5757\u6570\u636e\u5230\u7f13\u51b2\u533a\uff0c\u540e\u7eed\u7684\u8bfb\u64cd\u4f5c\u76f4\u63a5\u4ece\u7f13\u51b2\u533a\u83b7\u53d6\uff1a<\/li>\n<\/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=\"\">try (BufferedInputStream bis = new BufferedInputStream(\n        new FileInputStream(\"data.txt\"))) {\n    int data;\n    while ((data = bis.read()) != -1) { \/\/ \u5b9e\u9645\u4ece\u7f13\u51b2\u533a\u8bfb\u53d6\uff0c\u51cf\u5c11\u7cfb\u7edfIO\u8c03\u7528\n        \/\/ \u5904\u7406\u6570\u636e\n    }\n}<\/pre>\n\n\n\n<p>\u4f18\u52bf\uff1a\u82e5\u6587\u4ef6\u6709 1000 \u5b57\u8282\uff0c\u53ea\u9700 1 \u6b21\u7cfb\u7edf IO \u5c06\u6570\u636e\u8bfb\u5165\u7f13\u51b2\u533a\uff0c\u540e\u7eed 999 \u6b21\u8bfb\u64cd\u4f5c\u76f4\u63a5\u4ece\u5185\u5b58\u7f13\u51b2\u533a\u83b7\u53d6\uff0c\u5927\u5e45\u63d0\u5347\u6548\u7387\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7f13\u51b2\u6d41\u7684\u5de5\u4f5c\u539f\u7406\uff1a\u4ee5<code>BufferedOutputStream<\/code>\u4e3a\u4f8b<\/strong><\/p>\n\n\n\n<p><strong>\u5199\u5165\u6d41\u7a0b<\/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=\"\">try (BufferedOutputStream bos = new BufferedOutputStream(\n        new FileOutputStream(\"output.txt\"))) {\n    bos.write(\"Hello\".getBytes()); \/\/ \u5148\u5199\u5165\u7f13\u51b2\u533a\uff0c\u800c\u975e\u76f4\u63a5\u5199\u5165\u6587\u4ef6\n    bos.write(\"World\".getBytes()); \/\/ \u7ee7\u7eed\u5199\u5165\u7f13\u51b2\u533a\n    \/\/ \u7f13\u51b2\u533a\u6ee1\u6216\u8c03\u7528flush()\/close()\u65f6\uff0c\u624d\u5c06\u6570\u636e\u6279\u91cf\u5199\u5165\u6587\u4ef6\n}<\/pre>\n\n\n\n<ul>\n<li><strong>\u5173\u952e\u70b9<\/strong>\uff1a\n<ul>\n<li>\u6570\u636e\u5148\u5199\u5165\u5185\u5b58\u7f13\u51b2\u533a\uff0c\u800c\u975e\u76f4\u63a5\u5199\u5165\u6587\u4ef6\u3002<\/li>\n\n\n\n<li>\u5f53\u7f13\u51b2\u533a\u6ee1\uff08\u9ed8\u8ba4 8KB\uff09\u6216\u624b\u52a8\u8c03\u7528<code>flush()<\/code>\u65f6\uff0c\u624d\u5c06\u6570\u636e\u4e00\u6b21\u6027\u5199\u5165\u6587\u4ef6\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7f13\u51b2\u533a\u7684\u4f18\u52bf<\/strong><\/p>\n\n\n\n<ul>\n<li>\u51cf\u5c11\u78c1\u76d8 IO \u6b21\u6570\uff1a\u4ece\u6bcf\u6b21\u5199 1 \u5b57\u8282 \u2192 \u6bcf\u6b21\u5199 8KB\u3002<\/li>\n\n\n\n<li>\u7c7b\u6bd4\uff1a\n<ul>\n<li>\u666e\u901a\u6d41\uff1a\u50cf\u7528\u52fa\u5b50\u8200\u6c34\uff0c\u6bcf\u6b21\u8200\u4e00\u52fa\u5012\u5165\u6876\u4e2d\uff08\u6548\u7387\u4f4e\uff09\u3002<\/li>\n\n\n\n<li>\u7f13\u51b2\u6d41\uff1a\u50cf\u7528\u5927\u6876\u63a5\u6c34\uff0c\u88c5\u6ee1\u4e00\u6876\u540e\u518d\u5012\u5165\u6c34\u7f38\uff08\u6548\u7387\u9ad8\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>Java \u4e2d\u7684\u7f13\u51b2\u6d41\u7c7b<\/strong><\/p>\n\n\n\n<p>Java \u63d0\u4f9b\u4e86 4 \u79cd\u7f13\u51b2\u6d41\uff0c\u5206\u522b\u5bf9\u5e94\u5b57\u8282\u6d41\u548c\u5b57\u7b26\u6d41\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th><strong>\u7c7b\u578b<\/strong><\/th><th><strong>\u8f93\u5165\u6d41<\/strong><\/th><th><strong>\u8f93\u51fa\u6d41<\/strong><\/th><th><strong>\u9002\u7528\u573a\u666f<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>\u5b57\u8282\u7f13\u51b2\u6d41<\/strong><\/td><td><code>BufferedInputStream<\/code><\/td><td><code>BufferedOutputStream<\/code><\/td><td>\u5904\u7406\u4e8c\u8fdb\u5236\u6570\u636e\uff08\u56fe\u7247\u3001\u89c6\u9891\uff09<\/td><\/tr><tr><td><strong>\u5b57\u7b26\u7f13\u51b2\u6d41<\/strong><\/td><td><code>BufferedReader<\/code><\/td><td><code>BufferedWriter<\/code><\/td><td>\u5904\u7406\u6587\u672c\u6570\u636e\uff08.txt\u3001.json\uff09<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7f13\u51b2\u6d41\u7684\u989d\u5916\u529f\u80fd<\/strong><\/p>\n\n\n\n<p><strong>\u5b57\u7b26\u7f13\u51b2\u6d41\u7684\u9ad8\u6548\u6587\u672c\u64cd\u4f5c<\/strong><\/p>\n\n\n\n<p><code>BufferedReader<\/code>\u63d0\u4f9b<code>readLine()<\/code>\u65b9\u6cd5\uff0c\u76f4\u63a5\u8bfb\u53d6\u4e00\u884c\u6587\u672c\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=\"\">try (BufferedReader br = new BufferedReader(\n        new FileReader(\"data.txt\"))) {\n    String line;\n    while ((line = br.readLine()) != null) { \/\/ \u9ad8\u6548\u8bfb\u53d6\u6574\u884c\n        System.out.println(line);\n    }\n}<\/pre>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><code>BufferedWriter<\/code>\u63d0\u4f9b<code>newLine()<\/code>\u65b9\u6cd5\uff0c\u81ea\u52a8\u6dfb\u52a0\u7cfb\u7edf\u65e0\u5173\u7684\u6362\u884c\u7b26\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=\"\">try (BufferedWriter bw = new BufferedWriter(\n        new FileWriter(\"output.txt\"))) {\n    bw.write(\"\u7b2c\u4e00\u884c\");\n    bw.newLine(); \/\/ \u81ea\u52a8\u6dfb\u52a0\u6362\u884c\u7b26\uff08Windows\u662f\\r\\n\uff0cLinux\u662f\\n\uff09\n    bw.write(\"\u7b2c\u4e8c\u884c\");\n}<\/pre>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u81ea\u5b9a\u4e49\u7f13\u51b2\u533a\u5927\u5c0f<\/strong><\/p>\n\n\n\n<p>\u53ef\u901a\u8fc7\u6784\u9020\u51fd\u6570\u6307\u5b9a\u7f13\u51b2\u533a\u5927\u5c0f\uff08\u9ed8\u8ba4 8KB\uff09\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=\"\">\/\/ \u6307\u5b9a\u7f13\u51b2\u533a\u4e3a16KB\nBufferedInputStream bis = new BufferedInputStream(\n        new FileInputStream(\"data.txt\"), 16384);<\/pre>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u4f55\u65f6\u4f7f\u7528\u7f13\u51b2\u6d41\uff1f<\/strong><\/p>\n\n\n\n<p>\u5efa\u8bae\u5728\u4efb\u4f55 IO \u64cd\u4f5c\u4e2d\u90fd\u4f7f\u7528\u7f13\u51b2\u6d41\uff0c\u5c24\u5176\u662f\uff1a<\/p>\n\n\n\n<ol>\n<li>\u9891\u7e41\u8bfb\u5199\u5c0f\u6570\u636e\uff08\u5982\u9010\u884c\u8bfb\u53d6\u6587\u672c\uff09\u3002<\/li>\n\n\n\n<li>\u64cd\u4f5c\u5927\u6587\u4ef6\uff08\u5982\u590d\u5236 GB \u7ea7\u89c6\u9891\uff09\u3002<\/li>\n\n\n\n<li>\u7f51\u7edc IO\uff08\u5982 Socket \u901a\u4fe1\uff09\u3002<\/li>\n<\/ol>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u793a\u4f8b\uff1a\u590d\u5236\u5927\u6587\u4ef6\u65f6\u7f13\u51b2\u6d41\u7684\u6027\u80fd\u63d0\u5347<\/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=\"\">\/\/ \u65e0\u7f13\u51b2\uff08\u6162\uff09\ntry (FileInputStream fis = new FileInputStream(\"input.zip\");\n     FileOutputStream fos = new FileOutputStream(\"output.zip\")) {\n    byte[] buffer = new byte[1024];\n    int len;\n    while ((len = fis.read(buffer)) != -1) {\n        fos.write(buffer, 0, len);\n    }\n}\n\n\/\/ \u6709\u7f13\u51b2\uff08\u5feb\uff09\ntry (BufferedInputStream bis = new BufferedInputStream(\n         new FileInputStream(\"input.zip\"));\n     BufferedOutputStream bos = new BufferedOutputStream(\n         new FileOutputStream(\"output.zip\"))) {\n    byte[] buffer = new byte[1024];\n    int len;\n    while ((len = bis.read(buffer)) != -1) {\n        bos.write(buffer, 0, len);\n    }\n}<\/pre>\n\n\n\n<p><strong>\u7f13\u51b2\u6d41\u662f IO \u7684\u6027\u80fd\u52a0\u901f\u5668<\/strong>\uff0c\u5b83\u901a\u8fc7\u6279\u91cf\u8bfb\u5199\u51cf\u5c11\u4e0e\u5e95\u5c42\u8d44\u6e90\u7684\u4ea4\u4e92\u6b21\u6570\uff0c\u5c31\u50cf\u5feb\u9012\u5458\u4e00\u6b21\u9001\u591a\u4e2a\u5305\u88f9\u800c\u975e\u9010\u4e2a\u6d3e\u9001\uff0c\u663e\u8457\u63d0\u5347\u6548\u7387\u3002\u65e0\u8bba\u662f\u5904\u7406\u5927\u6587\u4ef6\u8fd8\u662f\u5c0f\u6570\u636e\uff0c\u90fd\u5efa\u8bae\u4f18\u5148\u4f7f\u7528\u7f13\u51b2\u6d41\uff01<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>Java I O\u6d41\u4e00\u5b9a\u8981\u5173\u95ed\u5417\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5728 Java \u4e2d\uff0cIO \u6d41<strong>\u5fc5\u987b\u5173\u95ed<\/strong>\uff0c\u5426\u5219\u4f1a\u5bfc\u81f4\u4e25\u91cd\u7684\u8d44\u6e90\u6cc4\u6f0f\u95ee\u9898\u3002\u8fd9\u5c31\u50cf\u4f60\u7528\u5b8c\u6c34\u9f99\u5934\u540e\u5fc5\u987b\u5173\u6389\uff0c\u5426\u5219\u4f1a\u6d6a\u8d39\u6c34\u8d44\u6e90\u5e76\u53ef\u80fd\u5f15\u53d1\u6c34\u707e\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u89e3\u91ca\uff1a<\/p>\n\n\n\n<p><strong>\u4e3a\u4ec0\u4e48\u5fc5\u987b\u5173\u95ed IO \u6d41\uff1f<\/strong><\/p>\n\n\n\n<p>1. \u8d44\u6e90\u5360\u7528<\/p>\n\n\n\n<ul>\n<li>IO \u6d41\uff08\u5982<code>FileInputStream<\/code>\u3001<code>Socket<\/code>\uff09\u901a\u5e38\u4f1a\u5360\u7528\u64cd\u4f5c\u7cfb\u7edf\u7684<strong>\u6587\u4ef6\u63cf\u8ff0\u7b26<\/strong>\u3001<strong>\u7f51\u7edc\u8fde\u63a5<\/strong>\u3001<strong>\u5185\u5b58\u7f13\u51b2\u533a<\/strong>\u7b49\u8d44\u6e90\u3002<\/li>\n\n\n\n<li>\u82e5\u4e0d\u5173\u95ed\uff0c\u8fd9\u4e9b\u8d44\u6e90\u4e0d\u4f1a\u88ab\u81ea\u52a8\u91ca\u653e\uff0c\u957f\u671f\u79ef\u7d2f\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u8d44\u6e90\u8017\u5c3d\uff0c\u7a0b\u5e8f\u5d29\u6e83\u3002<\/li>\n<\/ul>\n\n\n\n<p>2. \u6570\u636e\u5b8c\u6574\u6027\u98ce\u9669<\/p>\n\n\n\n<ul>\n<li>\u8f93\u51fa\u6d41\uff08\u5982<code>FileOutputStream<\/code>\uff09\u901a\u5e38\u6709<strong>\u7f13\u51b2\u533a<\/strong>\uff0c\u6570\u636e\u5148\u5199\u5165\u7f13\u51b2\u533a\uff0c\u800c\u975e\u76f4\u63a5\u5199\u5165\u6587\u4ef6\u3002<\/li>\n\n\n\n<li>\u82e5\u4e0d\u5173\u95ed\u6d41\uff0c\u7f13\u51b2\u533a\u7684\u6570\u636e\u53ef\u80fd<strong>\u4e0d\u4f1a\u88ab\u5237\u65b0\u5230\u78c1\u76d8<\/strong>\uff0c\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u3002\u4f8b\u5982\uff1a<\/li>\n<\/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=\"\">FileOutputStream fos = new FileOutputStream(\"test.txt\");\nfos.write(\"Hello\".getBytes());\n\/\/ \u672a\u8c03\u7528close()\u6216flush()\uff0c\"Hello\"\u53ef\u80fd\u4e0d\u4f1a\u5199\u5165\u6587\u4ef6\n\n<\/pre>\n\n\n\n<p>3. \u7cfb\u7edf\u9650\u5236<\/p>\n\n\n\n<ul>\n<li>\u64cd\u4f5c\u7cfb\u7edf\u5bf9\u6bcf\u4e2a\u8fdb\u7a0b\u7684<strong>\u6587\u4ef6\u63cf\u8ff0\u7b26\u6570\u91cf\u6709\u9650\u5236<\/strong>\uff08\u5982 Linux \u9ed8\u8ba4 1024 \u4e2a\uff09\u3002<\/li>\n\n\n\n<li>\u82e5\u9891\u7e41\u6253\u5f00 IO \u6d41\u800c\u4e0d\u5173\u95ed\uff0c\u4f1a\u8fc5\u901f\u8017\u5c3d\u9650\u5236\uff0c\u5bfc\u81f4\u540e\u7eed\u65e0\u6cd5\u6253\u5f00\u65b0\u6587\u4ef6\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u5173\u95ed IO \u6d41\u7684\u6b63\u786e\u65b9\u5f0f<\/strong><\/p>\n\n\n\n<p>\u4f20\u7edf\u65b9\u5f0f\uff1atry-finally<\/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=\"\">FileInputStream fis = null;\ntry {\n    fis = new FileInputStream(\"data.txt\");\n    \/\/ \u8bfb\u53d6\u6570\u636e\n} catch (IOException e) {\n    e.printStackTrace();\n} finally {\n    \/\/ \u786e\u4fdd\u6d41\u5728finally\u5757\u4e2d\u5173\u95ed\n    if (fis != null) {\n        try {\n            fis.close();\n        } catch (IOException e) {\n            e.printStackTrace();\n        }\n    }\n}<\/pre>\n\n\n\n<p><strong>\u95ee\u9898<\/strong>\uff1a\u4ee3\u7801\u7e41\u7410\uff0c\u6613\u9057\u6f0f\u5173\u95ed\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u73b0\u4ee3\u65b9\u5f0f\uff1atry-with-resources\uff08JDK7+\uff09<\/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=\"\">try (FileInputStream fis = new FileInputStream(\"data.txt\")) {\n    \/\/ \u8bfb\u53d6\u6570\u636e\uff0c\u6d41\u4f1a\u81ea\u52a8\u5173\u95ed\n} catch (IOException e) {\n    e.printStackTrace();\n}\n\n<\/pre>\n\n\n\n<p><strong>\u539f\u7406<\/strong>\uff1a\u5b9e\u73b0\u4e86<code>AutoCloseable<\/code>\u63a5\u53e3\u7684\u7c7b\uff08\u5982<code>FileInputStream<\/code>\uff09\uff0c\u4f1a\u5728<code>try<\/code>\u5757\u7ed3\u675f\u65f6\u81ea\u52a8\u8c03\u7528<code>close()<\/code>\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7f13\u51b2\u6d41\u7684\u7279\u6b8a\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n\n\n\n<p>\u7f13\u51b2\u6d41\u5fc5\u987b\u5173\u95ed<\/p>\n\n\n\n<ul>\n<li>\u7f13\u51b2\u6d41\uff08\u5982<code>BufferedOutputStream<\/code>\uff09\u7684<code>close()<\/code>\u4f1a\u81ea\u52a8\u8c03\u7528<code>flush()<\/code>\uff0c\u786e\u4fdd\u7f13\u51b2\u533a\u6570\u636e\u5199\u5165\u6587\u4ef6\u3002<\/li>\n\n\n\n<li>\u82e5\u53ea\u8c03\u7528<code>flush()<\/code>\u800c\u4e0d\u5173\u95ed\u6d41\uff0c\u867d\u7136\u6570\u636e\u4f1a\u5199\u5165\uff0c\u4f46\u6d41\u4ecd\u5360\u7528\u8d44\u6e90\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000\u3000<\/p>\n\n\n\n<p>\u88c5\u9970\u5668\u6d41\u53ea\u9700\u5173\u95ed\u6700\u5916\u5c42<\/p>\n\n\n\n<p>\u5f53\u4f7f\u7528\u88c5\u9970\u5668\u6d41\uff08\u5982<code>BufferedOutputStream<\/code>\u5305\u88c5<code>FileOutputStream<\/code>\uff09\u65f6\uff0c\u53ea\u9700\u5173\u95ed\u6700\u5916\u5c42\u6d41\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=\"\">try (BufferedOutputStream bos = new BufferedOutputStream(\n        new FileOutputStream(\"output.txt\"))) {\n    bos.write(\"Hello\".getBytes());\n    \/\/ \u53ea\u9700\u5173\u95edbos\uff0c\u5185\u90e8\u7684FileOutputStream\u4f1a\u88ab\u81ea\u52a8\u5173\u95ed\n}<\/pre>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p>\u5e38\u89c1\u8bef\u533a<\/p>\n\n\n\n<p>\u8bef\u533a 1\uff1aJVM \u4f1a\u81ea\u52a8\u56de\u6536 IO \u6d41<\/p>\n\n\n\n<ul>\n<li>\u771f\u76f8\uff1aIO \u6d41\u5360\u7528\u7684\u662f<strong>\u64cd\u4f5c\u7cfb\u7edf\u8d44\u6e90<\/strong>\uff0c\u800c\u975e Java \u5806\u5185\u5b58\u3002JVM \u7684\u5783\u573e\u56de\u6536\uff08GC\uff09\u53ea\u80fd\u56de\u6536 Java \u5bf9\u8c61\uff0c\u65e0\u6cd5\u76f4\u63a5\u91ca\u653e\u64cd\u4f5c\u7cfb\u7edf\u8d44\u6e90\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8bef\u533a 2\uff1a\u4f7f\u7528\u5c0f\u6587\u4ef6\u65f6\u53ef\u4ee5\u4e0d\u5173\u95ed\u6d41<\/p>\n\n\n\n<ul>\n<li>\u771f\u76f8\uff1a\u5373\u4f7f\u662f\u5c0f\u6587\u4ef6\uff0c\u82e5\u4e0d\u5173\u95ed\u6d41\uff0c\u6bcf\u6b21\u8fd0\u884c\u7a0b\u5e8f\u90fd\u4f1a\u79ef\u7d2f\u8d44\u6e90\u5360\u7528\uff0c\u957f\u671f\u53ef\u80fd\u5bfc\u81f4\u95ee\u9898\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u8bef\u533a 3\uff1a\u53ea\u5173\u95ed\u8f93\u51fa\u6d41\uff0c\u4e0d\u5173\u95ed\u8f93\u5165\u6d41<\/p>\n\n\n\n<ul>\n<li>\u771f\u76f8\uff1a\u8f93\u5165\u6d41\uff08\u5982<code>FileInputStream<\/code>\uff09\u4e5f\u5360\u7528\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u5fc5\u987b\u5173\u95ed\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6269\u5c55\uff1a\u54ea\u4e9b\u7c7b\u9700\u8981\u5173\u95ed\uff1f<\/p>\n\n\n\n<p>\u5b9e\u73b0\u4e86<code>AutoCloseable<\/code>\u63a5\u53e3\u7684\u7c7b\u90fd\u9700\u8981\u5173\u95ed\uff0c\u5e38\u89c1\u7684\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul>\n<li>IO<strong> \u6d41<\/strong>\uff1a<code>FileInputStream<\/code>\u3001<code>FileOutputStream<\/code>\u3001<code>BufferedReader<\/code>\u7b49\u3002<\/li>\n\n\n\n<li>\u7f51\u7edc\u8fde\u63a5\uff1a<code>Socket<\/code>\u3001<code>ServerSocket<\/code>\u3002<\/li>\n\n\n\n<li>\u6570\u636e\u5e93\u8fde\u63a5\uff1a<code>Connection<\/code>\u3001<code>Statement<\/code>\u3001<code>ResultSet<\/code>\u3002<\/li>\n\n\n\n<li>\u5176\u4ed6\u8d44\u6e90\uff1a<code>Process<\/code>\uff08\u6267\u884c\u5916\u90e8\u7a0b\u5e8f\uff09\u3001<code>ZipFile<\/code>\u7b49\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u5173\u95ed IO \u6d41\u5c31\u50cf\u7528\u5b8c\u6c34\u9f99\u5934\u8981\u5173\u6389<\/strong>\uff0c\u662f\u7f16\u7a0b\u7684\u57fa\u672c\u8981\u6c42\u3002\u4f7f\u7528<code>try-with-resources<\/code>\u8bed\u6cd5\uff0c\u65e2\u80fd\u4fdd\u8bc1\u8d44\u6e90\u6b63\u786e\u5173\u95ed\uff0c\u53c8\u80fd\u8ba9\u4ee3\u7801\u66f4\u7b80\u6d01\uff01\u7f16\u8f91\u5206\u4eab<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7406\u89e3 IO \u6d41\u5360\u7528\u7684\u7cfb\u7edf\u8d44\u6e90<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u6587\u4ef6\u63cf\u8ff0\u7b26\uff08File Descriptor\uff09\uff1a\u64cd\u4f5c\u7cfb\u7edf\u7684 \u201c\u6587\u4ef6\u901a\u884c\u8bc1\u201d<\/p>\n\n\n\n<p>1. \u672c\u8d28<\/p>\n\n\n\n<ul>\n<li>\u6587\u4ef6\u63cf\u8ff0\u7b26\u662f\u64cd\u4f5c\u7cfb\u7edf<strong>\u5185\u6838<\/strong>\u4e3a\u6bcf\u4e2a\u6253\u5f00\u7684\u6587\u4ef6\u5206\u914d\u7684<strong>\u552f\u4e00\u6574\u6570\u6807\u8bc6<\/strong>\uff08\u5982 Linux \u4e2d\u662f\u4e00\u4e2a\u975e\u8d1f\u6574\u6570\uff0c\u5982 0\u30011\u30012&#8230;\uff09\u3002<\/li>\n\n\n\n<li>\u7c7b\u6bd4\uff1a\u56fe\u4e66\u9986\u7ed9\u6bcf\u672c\u501f\u51fa\u7684\u4e66\u5206\u914d\u4e00\u4e2a \u201c\u501f\u9605\u8bc1\u7f16\u53f7\u201d\uff0c\u64cd\u4f5c\u7cfb\u7edf\u901a\u8fc7\u6587\u4ef6\u63cf\u8ff0\u7b26\u8ffd\u8e2a\u54ea\u4e9b\u6587\u4ef6\u88ab\u54ea\u4e9b\u7a0b\u5e8f\u6253\u5f00\u3002<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n\n\n\n<p>2. \u6587\u4ef6\u63cf\u8ff0\u7b26\u7684\u9650\u5236<\/p>\n\n\n\n<ul>\n<li>\u6bcf\u4e2a\u8fdb\u7a0b\uff08\u5982 Java \u7a0b\u5e8f\uff09\u80fd\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u6570\u91cf\u6709\u9650\uff08Linux \u9ed8\u8ba4 1024 \u4e2a\uff09\u3002<\/li>\n\n\n\n<li>\u793a\u4f8b\uff1a<\/li>\n<\/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=\"\">\/\/ \u9519\u8bef\u793a\u4f8b\uff1a\u5faa\u73af\u6253\u5f00\u6587\u4ef6\u4f46\u4e0d\u5173\u95ed\nfor (int i = 0; i &lt; 2000; i++) {\n    FileInputStream fis = new FileInputStream(\"data.txt\");\n    \/\/ \u672a\u5173\u95edfis\uff0c\u6587\u4ef6\u63cf\u8ff0\u7b26\u6301\u7eed\u5360\u7528\n}\n\n<\/pre>\n\n\n\n<p>\u7ed3\u679c\uff1a\u5faa\u73af\u5230\u7b2c 1025 \u6b21\u65f6\uff0c\u7a0b\u5e8f\u4f1a\u629b\u51fa<code>Too many open files<\/code>\u5f02\u5e38\uff0c\u56e0\u4e3a\u8d85\u8fc7\u4e86\u7cfb\u7edf\u9650\u5236\u3002<\/p>\n\n\n\n<p>3. \u5173\u95ed\u6d41\u7684\u610f\u4e49<\/p>\n\n\n\n<ul>\n<li>\u8c03\u7528<code>close()<\/code>\u76f8\u5f53\u4e8e\u5f52\u8fd8 \u201c\u501f\u9605\u8bc1\u201d\uff0c\u8ba9\u64cd\u4f5c\u7cfb\u7edf\u56de\u6536\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u4f9b\u5176\u4ed6\u7a0b\u5e8f\u4f7f\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u7f51\u7edc\u8fde\u63a5\uff08Socket\uff09\uff1a\u5360\u7528\u7f51\u5361\u548c\u7aef\u53e3\u8d44\u6e90<\/strong><\/p>\n\n\n\n<p>\u7f51\u7edc\u8fde\u63a5\u7684\u5efa\u7acb\u8fc7\u7a0b<\/p>\n\n\n\n<ul>\n<li>\u5f53\u521b\u5efa<code>Socket<\/code>\u8fde\u63a5\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\uff1a\n<ol>\n<li>\u5206\u914d\u672c\u5730\u7aef\u53e3\uff08\u5982 8080\u30019000\uff09\u3002<\/li>\n\n\n\n<li>\u5360\u7528\u7f51\u5361\u8d44\u6e90\uff08\u7528\u4e8e\u6570\u636e\u6536\u53d1\uff09\u3002<\/li>\n\n\n\n<li>\u5728\u5185\u6838\u4e2d\u7ef4\u62a4\u8fde\u63a5\u72b6\u6001\u8868\uff08\u8bb0\u5f55\u8fde\u63a5\u7684\u6e90 IP\u3001\u76ee\u6807 IP\u3001\u7aef\u53e3\u7b49\u4fe1\u606f\uff09\u3002<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<p>\u4e0d\u5173\u95ed\u8fde\u63a5\u7684\u540e\u679c<\/p>\n\n\n\n<ul>\n<li>\u7aef\u53e3\u8017\u5c3d\uff1a\u6bcf\u4e2a\u8fde\u63a5\u5360\u7528\u4e00\u4e2a\u7aef\u53e3\uff0c\u800c\u7aef\u53e3\u6570\u91cf\u6709\u9650\uff080~65535\uff09\u3002\u82e5\u4e0d\u5173\u95ed\uff0c\u4f1a\u5bfc\u81f4\u65e0\u6cd5\u521b\u5efa\u65b0\u8fde\u63a5\u3002<\/li>\n\n\n\n<li>\u8d44\u6e90\u6d6a\u8d39\uff1a\u5373\u4f7f\u8fde\u63a5\u4e0d\u518d\u4f7f\u7528\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4ecd\u4f1a\u4e3a\u5176\u5206\u914d\u7f13\u51b2\u533a\u548c CPU \u65f6\u95f4\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u751f\u6d3b\u5316\u7c7b\u6bd4<\/p>\n\n\n\n<ul>\n<li>\u7f51\u7edc\u8fde\u63a5\u5c31\u50cf\u6253\u7535\u8bdd\uff1a\n<ul>\n<li>\u5efa\u7acb\u8fde\u63a5\uff08<code>new Socket()<\/code>\uff09\u2192 \u62ff\u8d77\u7535\u8bdd\u62e8\u53f7\u3002<\/li>\n\n\n\n<li>\u6570\u636e\u4f20\u8f93 \u2192 \u901a\u8bdd\u4e2d\u3002<\/li>\n\n\n\n<li>\u5173\u95ed\u8fde\u63a5\uff08<code>socket.close()<\/code>\uff09\u2192 \u6302\u6389\u7535\u8bdd\u3002<\/li>\n\n\n\n<li>\u82e5\u4e0d\u6302\u7535\u8bdd\uff0c\u522b\u4eba\u65e0\u6cd5\u62e8\u6253\u8be5\u53f7\u7801\uff08\u7aef\u53e3\u88ab\u5360\u7528\uff09\uff0c\u4e14\u7535\u8bdd\u516c\u53f8\u6301\u7eed\u4e3a\u4f60\u5206\u914d\u7ebf\u8def\u8d44\u6e90\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u5185\u5b58\u7f13\u51b2\u533a\uff08Buffer\uff09\uff1a\u6570\u636e\u7684 \u201c\u4e34\u65f6\u4ed3\u5e93\u201d<\/strong><\/p>\n\n\n\n<p>\u7f13\u51b2\u533a\u7684\u4f5c\u7528<\/p>\n\n\n\n<ul>\n<li>\u4e3a\u63d0\u9ad8 IO \u6548\u7387\uff0cJava IO \u6d41\u901a\u5e38\u4f7f\u7528\u5185\u5b58\u7f13\u51b2\u533a\uff1a\n<ul>\n<li>\u8f93\u5165\u6d41\uff08\u5982<code>BufferedInputStream<\/code>\uff09\u4f1a\u9884\u8bfb\u6570\u636e\u5230\u7f13\u51b2\u533a\uff0c\u51cf\u5c11\u78c1\u76d8 IO \u6b21\u6570\u3002<\/li>\n\n\n\n<li>\u8f93\u51fa\u6d41\uff08\u5982<code>BufferedOutputStream<\/code>\uff09\u4f1a\u5148\u5c06\u6570\u636e\u5199\u5165\u7f13\u51b2\u533a\uff0c\u6ee1\u540e\u518d\u6279\u91cf\u5199\u5165\u78c1\u76d8\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u4e0d\u5173\u95ed\u6d41\u5bfc\u81f4\u7684\u95ee\u9898<\/p>\n\n\n\n<ul>\n<li>\u6570\u636e\u4e22\u5931\uff1a\u82e5\u7f13\u51b2\u533a\u672a\u6ee1\u4e14\u672a\u8c03\u7528<code>flush()<\/code>\/<code>close()<\/code>\uff0c\u6570\u636e\u4f1a\u505c\u7559\u5728\u7f13\u51b2\u533a\uff0c\u4e0d\u4f1a\u5199\u5165\u6587\u4ef6\u3002\n<ul>\n<li>\u793a\u4f8b\uff1a<\/li>\n<\/ul>\n<\/li>\n<\/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=\"\">BufferedOutputStream bos = new BufferedOutputStream(\n    new FileOutputStream(\"test.txt\"));\nbos.write(\"Hello\".getBytes());\n\/\/ \u672a\u8c03\u7528bos.close()\u6216bos.flush()\uff0c\"Hello\"\u53ef\u80fd\u4e22\u5931<\/pre>\n\n\n\n<p>\u5185\u5b58\u6cc4\u6f0f\uff1a\u7f13\u51b2\u533a\u5360\u7528\u7684\u5185\u5b58\u4e0d\u4f1a\u88ab GC \u56de\u6536\uff0c\u76f4\u5230\u6d41\u88ab\u5173\u95ed\u3002<\/p>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>\u6570\u636e\u5e93\u8fde\u63a5\uff1a\u5360\u7528\u6570\u636e\u5e93\u670d\u52a1\u5668\u8d44\u6e90<\/strong><\/p>\n\n\n\n<p>\u6570\u636e\u5e93\u8fde\u63a5\u7684\u7279\u6b8a\u6027<\/p>\n\n\n\n<ul>\n<li>\u6570\u636e\u5e93\u8fde\u63a5\uff08\u5982<code>java.sql.Connection<\/code>\uff09\u4e0d\u4ec5\u5360\u7528\u672c\u5730\u8d44\u6e90\uff0c\u8fd8\u4f1a\u5728<strong>\u6570\u636e\u5e93\u670d\u52a1\u5668\u7aef<\/strong>\u521b\u5efa\u4f1a\u8bdd\uff08Session\uff09\u3002<\/li>\n\n\n\n<li>\u6bcf\u4e2a\u4f1a\u8bdd\u4f1a\u5360\u7528\uff1a\n<ul>\n<li>\u670d\u52a1\u5668\u5185\u5b58\uff08\u7528\u4e8e\u5b58\u50a8\u4f1a\u8bdd\u72b6\u6001\u3001\u67e5\u8be2\u7f13\u5b58\u7b49\uff09\u3002<\/li>\n\n\n\n<li>\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u4e2d\u7684\u4e00\u4e2a\u69fd\u4f4d\uff08\u82e5\u4f7f\u7528\u8fde\u63a5\u6c60\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u4e0d\u5173\u95ed\u8fde\u63a5\u7684\u540e\u679c<\/p>\n\n\n\n<ul>\n<li>\u670d\u52a1\u5668\u8d44\u6e90\u8017\u5c3d\uff1a\u5927\u91cf\u672a\u5173\u95ed\u7684\u4f1a\u8bdd\u4f1a\u5bfc\u81f4\u6570\u636e\u5e93\u670d\u52a1\u5668\u5185\u5b58\u6ea2\u51fa\uff0c\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n\n\n\n<li>\u8fde\u63a5\u6c60\u8017\u5c3d\uff1a\u82e5\u8fde\u63a5\u6c60\u4e2d\u7684\u8fde\u63a5\u88ab\u5360\u6ee1\uff0c\u65b0\u7684\u6570\u636e\u5e93\u8bf7\u6c42\u4f1a\u88ab\u963b\u585e\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u7c7b\u6bd4<\/p>\n\n\n\n<ul>\n<li>\u6570\u636e\u5e93\u8fde\u63a5\u5c31\u50cf\u53bb\u94f6\u884c\u529e\u7406\u4e1a\u52a1\uff1a\n<ul>\n<li>\u5efa\u7acb\u8fde\u63a5 \u2192 \u53d6\u53f7\u6392\u961f\u3002<\/li>\n\n\n\n<li>\u6267\u884c SQL \u2192 \u529e\u7406\u4e1a\u52a1\u3002<\/li>\n\n\n\n<li>\u5173\u95ed\u8fde\u63a5 \u2192 \u4e1a\u52a1\u5b8c\u6210\uff0c\u91ca\u653e\u7a97\u53e3\u8d44\u6e90\u3002<\/li>\n\n\n\n<li>\u82e5\u4e0d\u91ca\u653e\u7a97\u53e3\uff0c\u540e\u9762\u7684\u5ba2\u6237\u65e0\u6cd5\u529e\u7406\u4e1a\u52a1\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u3000<\/p>\n\n\n\n<p><strong>Java \u4e2d\u53ef\u4ee5\u4f7f\u7528 ASCII \u7f16\u7801\u5199\u5165\u6c49\u5b57\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5728 Java \u4e2d\u4f7f\u7528 ASCII \u7f16\u7801\u5199\u5165\u6c49\u5b57<strong>\u65e0\u6cd5\u6b63\u786e\u8bfb\u53d6<\/strong>\uff0c\u56e0\u4e3a ASCII \u7f16\u7801<strong>\u4e0d\u652f\u6301\u6c49\u5b57<\/strong>\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u89e3\u91ca\u548c\u793a\u4f8b\uff1a<\/p>\n\n\n\n<p>ASCII \u7f16\u7801\u7684\u5c40\u9650\u6027<\/p>\n\n\n\n<ul>\n<li><strong>ASCII\uff08American Standard Code for Information Interchange\uff09<\/strong>\u00a0\u662f\u7f8e\u56fd\u4fe1\u606f\u4ea4\u6362\u6807\u51c6\u4ee3\u7801\uff0c\u4ec5\u5305\u542b<strong>128 \u4e2a\u5b57\u7b26<\/strong>\uff1a\n<ul>\n<li>\u82f1\u6587\u5b57\u6bcd\uff08\u5927\u5199 A-Z\uff0c\u5c0f\u5199 a-z\uff09\u3001\u6570\u5b57\uff080-9\uff09\u3001\u6807\u70b9\u7b26\u53f7\u3002<\/li>\n\n\n\n<li><strong>\u4e0d\u5305\u542b\u4efb\u4f55\u4e2d\u6587\u6c49\u5b57<\/strong>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u7f16\u7801\u8303\u56f4\uff1a0-127\uff08\u7528 7 \u4f4d\u4e8c\u8fdb\u5236\u8868\u793a\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u7528 ASCII \u5199\u5165\u4e2d\u6587\u7684\u7ed3\u679c<\/p>\n\n\n\n<p>\u5f53\u4f60\u5c1d\u8bd5\u7528 ASCII \u7f16\u7801\u5199\u5165\u4e2d\u6587\u65f6\uff0c<strong>Java \u4f1a\u5c06\u65e0\u6cd5\u7f16\u7801\u7684\u5b57\u7b26\u66ff\u6362\u4e3a<code>?<\/code><\/strong>\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=\"\">try (FileOutputStream fos = new FileOutputStream(\"test.txt\")) {\n    String text = \"\u4f60\u597d\uff0c\u4e16\u754c\uff01\";\n    byte[] bytes = text.getBytes(\"ASCII\"); \/\/ \u4f7f\u7528ASCII\u7f16\u7801\n    fos.write(bytes);\n} catch (IOException e) {\n    e.printStackTrace();\n}<\/pre>\n\n\n\n<p>\u6587\u4ef6\u5185\u5bb9<\/p>\n\n\n\n<p>\u6253\u5f00<code>test.txt<\/code>\u4f1a\u770b\u5230\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<\/pre>\n\n\n\n<p>\u539f\u56e0\u5206\u6790<\/p>\n\n\n\n<ul>\n<li>\u6c49\u5b57\uff08\u5982<code>\u4f60<\/code>\u3001<code>\u597d<\/code>\uff09\u7684 Unicode \u7801\u70b9\u8d85\u51fa\u4e86 ASCII \u8303\u56f4\uff080-127\uff09\u3002<\/li>\n\n\n\n<li>Java \u5728\u7f16\u7801\u65f6\u4f1a\u5c06\u8fd9\u4e9b\u5b57\u7b26\u66ff\u6362\u4e3a<code>?<\/code>\uff08ASCII \u4e2d\u7684 63\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4e8c\u8fdb\u5236\u5185\u5bb9<\/p>\n\n\n\n<p>\u6587\u4ef6<code>test.txt<\/code>\u7684\u5b9e\u9645\u4e8c\u8fdb\u5236\u5185\u5bb9\u662f\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=\"\">0x3F 0x3F \uff08\u5373\u4e24\u4e2a\u8fde\u7eed\u7684`?`\u5b57\u7b26\uff09\n<\/pre>\n\n\n\n<p>\u8bfb\u53d6 ASCII \u7f16\u7801\u7684\u4e2d\u6587\u6587\u4ef6<\/p>\n\n\n\n<p>\u5373\u4f7f\u4f60\u77e5\u9053\u6587\u4ef6\u662f\u7528 ASCII \u7f16\u7801\u5199\u5165\u7684\uff0c\u8bfb\u53d6\u65f6\u4e5f\u65e0\u6cd5\u6062\u590d\u539f\u59cb\u4e2d\u6587\u5185\u5bb9\uff0c\u56e0\u4e3a\u4fe1\u606f\u5df2\u6c38\u4e45\u4e22\u5931\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=\"\">try (FileInputStream fis = new FileInputStream(\"test.txt\")) {\n    byte[] bytes = fis.readAllBytes();\n    String text = new String(bytes, \"ASCII\");\n    System.out.println(text); \/\/ \u8f93\u51fa\uff1a??????\n} catch (IOException e) {\n    e.printStackTrace();\n}<\/pre>\n\n\n\n<p>\u8be6\u7ec6\u8fc7\u7a0b\u89e3\u6790<\/p>\n\n\n\n<p>\u5b57\u7b26\u4e32 \u2192 \u5b57\u8282\u6570\u7ec4\uff08\u7f16\u7801\u8fc7\u7a0b\uff09<\/p>\n\n\n\n<ul>\n<li>\u5b57\u7b26<code>\u4f60<\/code>\uff1a\n<ul>\n<li>Unicode \u7801\u70b9\uff1a<code>U+4F60<\/code>\uff08\u5341\u8fdb\u5236 20304\uff09\u3002<\/li>\n\n\n\n<li>ASCII \u8303\u56f4\uff1a0-127\u3002<\/li>\n\n\n\n<li><strong>\u7ed3\u679c<\/strong>\uff1a\u8d85\u51fa ASCII \u8303\u56f4\uff0c\u88ab\u66ff\u6362\u4e3a<code>?<\/code>\uff08ASCII \u7801 63\uff0c\u5373<code>0x3F<\/code>\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5b57\u7b26<code>\u597d<\/code>\uff1a\n<ul>\n<li>Unicode \u7801\u70b9\uff1a<code>U+597D<\/code>\uff08\u5341\u8fdb\u5236 22909\uff09\u3002<\/li>\n\n\n\n<li>\u540c\u6837\u8d85\u51fa ASCII \u8303\u56f4\uff0c\u88ab\u66ff\u6362\u4e3a<code>?<\/code>\uff08<code>0x3F<\/code>\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u5b57\u8282\u6570\u7ec4 \u2192 \u6587\u4ef6\uff08\u5199\u5165\u8fc7\u7a0b\uff09<\/p>\n\n\n\n<ul>\n<li><code>FileOutputStream<\/code>\u76f4\u63a5\u5c06\u5b57\u8282\u6570\u7ec4<code>[0x3F, 0x3F]<\/code>\u5199\u5165\u6587\u4ef6\u3002<\/li>\n\n\n\n<li>\u6587\u4ef6\u5185\u5bb9\u5728\u6587\u672c\u7f16\u8f91\u5668\u4e2d\u663e\u793a\u4e3a<\/li>\n<\/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=\"\">??<\/pre>\n\n\n\n<p>\u9a8c\u8bc1\u65b9\u6cd5<\/p>\n\n\n\n<p>\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u67e5\u770b\u5b9e\u9645\u5b57\u8282\u503c\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=\"\">String text = \"\u4f60\u597d\";\nbyte[] bytes = text.getBytes(\"ASCII\");\n\nfor (byte b : bytes) {\n    System.out.printf(\"0x%02X \", b); \/\/ \u8f93\u51fa\uff1a0x3F 0x3F\n}<\/pre>\n\n\n\n<p>\u4e3a\u4ec0\u4e48\u4f1a\u8fd9\u6837\uff1f<\/p>\n\n\n\n<ul>\n<li>ASCII \u7684\u5c40\u9650\u6027\uff1a\u4ec5\u5305\u542b 128 \u4e2a\u5b57\u7b26\uff0c\u65e0\u6cd5\u8868\u793a\u4e2d\u6587\u3001\u65e5\u6587\u7b49\u975e\u82f1\u8bed\u5b57\u7b26\u3002<\/li>\n\n\n\n<li>Java \u7684\u5904\u7406\u903b\u8f91\uff1a\u5f53\u9047\u5230\u65e0\u6cd5\u7f16\u7801\u7684\u5b57\u7b26\u65f6\uff0c\u9ed8\u8ba4\u4f7f\u7528<strong>\u66ff\u6362\u6a21\u5f0f<\/strong>\uff08<code>REPLACE<\/code>\uff09\uff0c\u5373\u7528<code>?<\/code>\u66ff\u4ee3\u65e0\u6cd5\u7f16\u7801\u7684\u5b57\u7b26\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5982\u4f55\u6b63\u786e\u5b58\u50a8\u4e2d\u6587\uff1f<\/p>\n\n\n\n<p>\u4f7f\u7528\u652f\u6301\u4e2d\u6587\u7684\u7f16\u7801\uff08\u5982 UTF-8\uff09\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=\"\">ry (FileOutputStream fos = new FileOutputStream(\"test.txt\")) {\n    String text = \"\u4f60\u597d\";\n    byte[] bytes = text.getBytes(\"UTF-8\"); \/\/ UTF-8\u7f16\u7801\n    fos.write(bytes);\n}\n\n<\/pre>\n\n\n\n<p>\u4e8c\u8fdb\u5236\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=\"\">0xE4 0xBD 0xA0 0xE5 0xA5 0xBD \uff08\u5bf9\u5e94\"\u4f60\u597d\"\u7684UTF-8\u7f16\u7801\uff09\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u8f6c\u8f7d\uff1aJava IO\u6d41\u8be6\u89e3\uff08\u9762\u8bd5\u4e0d\u8981\u518d\u95ee\u6211IO\u6d41\uff09 \u6570\u636e\u6d41\u7684\u57fa\u672c\u6982\u5ff5 \u51e0\u4e4e\u6240\u6709\u7684\u7a0b\u5e8f\u90fd\u79bb\u4e0d\u5f00\u4fe1\u606f\u7684\u8f93\u5165\u548c\u8f93\u51fa\uff0c [&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\/18337"}],"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=18337"}],"version-history":[{"count":14,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/18337\/revisions"}],"predecessor-version":[{"id":18357,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/18337\/revisions\/18357"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=18337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=18337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=18337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}