{"id":3834,"date":"2019-02-02T16:04:37","date_gmt":"2019-02-02T08:04:37","guid":{"rendered":"http:\/\/www.xttblog.com\/?p=3834"},"modified":"2020-02-25T11:32:19","modified_gmt":"2020-02-25T03:32:19","slug":"%e6%8b%9c%e6%89%98%ef%bc%8c%e8%af%b7%e5%88%ab%e5%86%8d%e9%97%ae%e6%88%91-bio%ef%bc%8cnio%ef%bc%8caio-%e4%ba%86%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=3834","title":{"rendered":"\u62dc\u6258\uff0c\u8bf7\u522b\u518d\u95ee\u6211 BIO\uff0cNIO\uff0cAIO \u4e86\uff01"},"content":{"rendered":"<p>\u8fd9\u662f\u4e00\u4e2a\u9762\u8bd5\u4e2d\u7ecf\u5e38\u88ab\u95ee\u5230\u7684\u95ee\u9898\uff0c\u4e5f\u662f\u9ad8\u9891\u9762\u8bd5\u9898\u3002\u6211\u672c\u6765\u662f\u4e0d\u60f3\u5199\u8fd9\u65b9\u9762\u7684\u5185\u5bb9\u7684\uff0c\u6015\u8bef\u5bfc\u5927\u5bb6\u3002\u4f46\u662f\u5948\u4f55\u603b\u6709\u7f51\u53cb\u7ed9\u6211\u79c1\u4fe1\uff0c\u60f3\u8ba9\u6211\u7b80\u5355\u7684\u89e3\u91ca\u4e00\u4e0b\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u5c31\u6709\u4e86\u672c\u6587\u3002\u5176\u4e2d\u53ef\u80fd\u6709\u90e8\u5206\u63cf\u8ff0\u4e0d\u51c6\u786e\u6216\u8005\u9519\u8bef\u7684\u5730\u65b9\uff0c\u5927\u5bb6\u7559\u8a00\uff0c\u5171\u540c\u4ea4\u6d41\uff0c\u5171\u540c\u8fdb\u6b65\uff01<\/p>\n<p>BIO\uff0cNIO\uff0cAIO \u8fd9\u4e09\u4e2a\u540d\u8bcd\u4e2d\u90fd\u5e26\u4e86\u4e00\u4e2a\u201cIO\u201d\u3002\u90a3\u6211\u4eec\u5c31\u5148\u770b\u770b\u4ec0\u4e48\u662f\u201cIO\u201d\u3002<\/p>\n<h2>IO<\/h2>\n<p>IO \u5176\u5b9e\u5c31\u662f INPUT \u548c OUPUT \u7684\u7b80\u79f0\u3002\u4e0e IO \u76f8\u5173\u7684\u8fd8\u6709\u201cIO\u6d41\u201d\uff0c\u5c31\u662f\u8bf4\u4ee5\u6d41\u7684\u5f62\u5f0f\u8fdb\u884c\u201cIO\u201d\u3002\u8fd8\u6709\u5c31\u662f\u201cIO\u8bfb\u5199\u201d\uff0c\u5f88\u591a\u8001\u53f8\u673a\u90fd\u641e\u4e0d\u6e05\u4ec0\u4e48\u662f INPUT \u548c OUPUT\u3002<\/p>\n<p>\u8fd9\u4e2a&nbsp;INPUT \u548c OUPUT \u5176\u5b9e\u5f88\u7b80\u5355\uff0c\u4ee5\u5185\u5b58\u4e3a\u76ee\u6807\uff0c\u6570\u636e\u8fdb\u5185\u5b58\u53eb In\uff0c\u51fa\u5185\u5b58\u53eb Out\u3002\u4ee5\u524d\u6211\u7684\u8001\u5e08\u90fd\u7ecf\u5e38\u641e\u9519\uff01<\/p>\n<p>\u660e\u767d IO \u540e\uff0c\u6211\u4eec\u5728\u770b\u6765 BIO\u3002<\/p>\n<h2>BIO<\/h2>\n<p>\u5373 Blocking IO\uff0c\u963b\u585e\u5f0f IO\u3002\u4e5f\u6709\u4eba\u79f0\u5b83\u4e3a\u540c\u6b65\u963b\u585e&nbsp;IO\uff0c\u4e3a\u4ec0\u4e48\u52a0\u4e86\u4e2a\u540c\u6b65\u5462\uff1f\u6211\u4e0b\u9762\u4f1a\u8bb2\u3002<\/p>\n<p><img decoding=\"async\" style=\"width: 399px;height: 241px\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1fzs3dgduh4j20b306pjrp.jpg\" alt=\"IO \u6a21\u578b\u77e9\u9635\"><\/p>\n<p>\u963b\u585e&nbsp;IO\uff0c\u8bf4\u767d\u4e86\u5c31\u662f\u6570\u636e\u7684\u8bfb\u53d6\u5199\u5165\u5fc5\u987b\u963b\u585e\u5728\u4e00\u4e2a\u7ebf\u7a0b\u5185\u7b49\u5f85\u5176\u5b8c\u6210\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e48\u4e5f\u79f0\u4e3a\u540c\u6b65\u963b\u585e&nbsp;IO \u5462\uff1f\u56e0\u4e3a\u64cd\u4f5c IO \u6709\u4e24\u4e2a\u9636\u6bb5\uff0c\u4e00\u4e2a\u5185\u6838\uff0c\u4e00\u4e2a\u662f\u7528\u6237\u7a7a\u95f4\u3002<\/p>\n<p>\u6240\u8c13\u540c\u6b65\u963b\u585e&nbsp;IO\uff0c\u5c31\u662f\u8bf4\uff0c\u8fd9\u4e24\u4e2a\u9636\u6bb5\u90fd\u88ab\u963b\u585e\u4e86\u3002\u6bd4\u5982\uff0c\u4e00\u4e2a UDP \u6570\u636e\u5305\uff0c\u5728\u7f51\u7edc\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u6216\u6570\u636e\u5305\u8fd8\u4e0d\u5b8c\u6574\u65f6\uff0ckernel \u5c31\u4f1a\u88ab\u963b\u585e\uff0c\u7b49\u5f85\u8db3\u591f\u7684\u6570\u636e\u5230\u6765\u3002\u4e5f\u5c31\u662f\u8bf4\u6570\u636e\u88ab\u62f7\u8d1d\u5230\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u7684\u7f13\u51b2\u533a\u4e2d\u662f\u9700\u8981\u4e00\u4e2a\u8fc7\u7a0b\u7684\u3002\u800c\u5728\u7528\u6237\u8fdb\u7a0b\u8fd9\u8fb9\uff0c\u6574\u4e2a\u8fdb\u7a0b\u4f1a\u88ab\u963b\u585e\u3002\u5f53 kernel \u4e00\u76f4\u7b49\u5230\u6570\u636e\u51c6\u5907\u597d\u4e86\uff0c\u5b83\u5c31\u4f1a\u5c06\u6570\u636e\u4ece kernel \u4e2d\u62f7\u8d1d\u5230\u7528\u6237\u5185\u5b58\uff0c\u7136\u540e kernel \u8fd4\u56de\u7ed3\u679c\uff0c\u7528\u6237\u8fdb\u7a0b\u624d\u89e3\u9664 block&nbsp;\u7684\u72b6\u6001\uff0c\u91cd\u65b0\u8fd0\u884c\u8d77\u6765\u3002<\/p>\n<p>\u8fd8\u641e\u4e0d\u61c2\uff0c\u5c31\u770b\u4e0b\u9762\u8fd9\u4e2a\u56fe\uff0c\u753b\u7684\u5176\u5b9e\u4e0d\u662f\u5f88\u597d\u3002<\/p>\n<p><img decoding=\"async\" style=\"width: 901px;height: 529px\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1fzs3s5durdj20p10epgnv.jpg\" alt=\"BIO \u6570\u636e\u64cd\u4f5c\u6a21\u578b\"><\/p>\n<p>\u8fd9\u91cc\u9762\u6709\u4e24\u4e2a&nbsp;block\uff0c\u6240\u4ee5\uff0c\u6709\u4eba\u628a BIO \u79f0\u4e3a\u540c\u6b65\u963b\u585e IO\uff0c\u662f\u6ca1\u9519\u7684\u3002\u540c\u6b65\u548c\u5f02\u6b65\u4f60\u53ef\u4ee5\u770b\u4f5c\u662f\u9488\u5bf9\u5e94\u7528\u7a0b\u5e8f\u548c\u5185\u6838\u7684\u4ea4\u4e92\u800c\u8a00\u7684\u5c31\u884c\u4e86\u3002<\/p>\n<h2>NIO<\/h2>\n<p>NIO\uff0cnonblocking IO\uff0c\u4e5f\u53eb\u505a new IO\uff0c\u56e0\u4e3a\u662f NIO \u662f JDK 1.4 \u7684 java.nio.* \u5305\u4e2d\u5f15\u5165\u7684\u65b0 I\/O \u5e93\uff0c\u76ee\u7684\u662f\u63d0\u9ad8\u901f\u5ea6\uff0c\u4e5f\u662f\u5bf9\u4e4b\u524d\u7684 BIO \u4e00\u4e2a\u8865\u5145\u5b8c\u5584\u3002<\/p>\n<p>\u5728 BIO \u6a21\u578b\u4e2d\uff0c\u8fd9\u79cd IO \u6548\u7387\u592a\u4f4e\u4e86\uff0c\u5982\u679c\u9700\u8981\u5e76\u53d1\u5904\u7406\u591a\u4e2a I\/O \u8bf7\u6c42\uff0c\u90a3\u5c31\u9700\u8981\u591a\u7ebf\u7a0b\u6765\u652f\u6301\u3002\u6211\u4e0d\u53ef\u80fd\u5f00\u65e0\u9650\u4e2a\u7ebf\u7a0b\u5427\uff0c\u7ebf\u7a0b\u5f00\u7684\u8d8a\u591a CPU \u5207\u6362\u5c31\u6210\u4e86\u95ee\u9898\u3002<\/p>\n<p>\u6240\u4ee5\uff0c\u4eba\u4eec\u60f3\u5230\u4e86\u4e00\u79cd\u65b0\u7684\u5b9e\u73b0\uff0cNew IO\u3002NIO \u4f7f\u7528\u4e86\u591a\u8def\u590d\u7528\u5668\u673a\u5236\uff0c\u4ee5 socket \u4f7f\u7528\u6765\u8bf4\uff0c\u591a\u8def\u590d\u7528\u5668\u901a\u8fc7\u4e0d\u65ad\u8f6e\u8be2\u5404\u4e2a\u8fde\u63a5\u7684\u72b6\u6001\uff0c\u53ea\u6709\u5728 socket \u6709\u6d41\u53ef\u8bfb\u6216\u8005\u53ef\u5199\u65f6\uff0c\u5e94\u7528\u7a0b\u5e8f\u624d\u9700\u8981\u53bb\u5904\u7406\u5b83\uff0c\u5728\u7ebf\u7a0b\u7684\u4f7f\u7528\u4e0a\uff0c\u5c31\u4e0d\u9700\u8981\u4e00\u4e2a\u8fde\u63a5\u5c31\u5fc5\u987b\u4f7f\u7528\u4e00\u4e2a\u5904\u7406\u7ebf\u7a0b\u4e86\uff0c\u800c\u662f\u53ea\u662f\u6709\u6548\u8bf7\u6c42\u65f6\uff08\u786e\u5b9e\u9700\u8981\u8fdb\u884c I\/O \u5904\u7406\u65f6\uff09\uff0c\u624d\u4f1a\u4f7f\u7528\u4e00\u4e2a\u7ebf\u7a0b\u53bb\u5904\u7406\uff0c\u8fd9\u6837\u5c31\u907f\u514d\u4e86 BIO \u6a21\u578b\u4e0b\u5927\u91cf\u7ebf\u7a0b\u5904\u4e8e\u963b\u585e\u7b49\u5f85\u72b6\u6001\u7684\u60c5\u666f\u3002<\/p>\n<p>\u4f55\u8c13\u591a\u8def\u590d\u7528\uff1f\u4f60\u53ef\u4ee5\u8fd9\u6837\u7406\u89e3\uff0c\u5c31\u662f\u591a\u6761\u7ebf\u8def\u4e0a\u7684\u8bf7\u6c42\uff0c\u6211\u4eec\u53ea\u7528\u4e00\u4e2a\u6216\u8005\u5c11\u91cf\u7684\u7ebf\u7a0b\u6765\u68c0\u67e5\u5404\u8def\u8bf7\u6c42\u7684\u8fde\u63a5\u72b6\u6001\uff0c\u53ea\u6709\u5728\u67d0\u6761\u7ebf\u8def\u4e0a\u6709\u53ef\u8bfb\u6216\u53ef\u5199\u7684\u6570\u636e\u65f6\uff0c\u5728\u5f00\u7ebf\u7a0b\u53bb\u5904\u7406\u3002<\/p>\n<p>\u8fd9\u6837\u505a\u4e86\u4e4b\u540e\uff0c\u6548\u7387\u786e\u5b9e\u63d0\u5347\u4e86\u4e0d\u5c11\u3002\u4f46\u662f\u8fd8\u4e0d\u5b8c\u7f8e\uff0c\u6240\u4ee5\u5c31\u6709\u4e86 AIO\u3002<\/p>\n<h2>AIO<\/h2>\n<p>AIO \u5c31\u662f Asynchronous I\/O\uff0c\u5f02\u6b65\u975e\u963b\u585e I\/O\u3002Java AIO \u5c31\u662f Java \u4f5c\u4e3a\u5bf9\u5f02\u6b65 IO \u63d0\u4f9b\u652f\u6301\u7684 NIO2\uff0cJava NIO2 (JSR 203)\u5b9a\u4e49\u4e86\u66f4\u591a\u7684 New I\/O APIs\uff0cNIO2 \u5728 2003 \u5e74\u88ab\u63d0\u51fa\uff0c\u76f4\u5230 2011 \u5e74\u624d\u53d1\u5e03\uff0c \u6700\u7ec8\u5728 JDK 7 \u4e2d\u624d\u5b9e\u73b0\u3002<\/p>\n<p>AIO \u76f8\u5bf9\u4e8e NIO \u7684\u533a\u522b\u5728\u4e8e\uff0cNIO \u9700\u8981\u4f7f\u7528\u8005\u7ebf\u7a0b\u4e0d\u505c\u7684\u8f6e\u8be2 IO \u5bf9\u8c61\uff0c\u6765\u786e\u5b9a\u662f\u5426\u6709\u6570\u636e\u51c6\u5907\u597d\u53ef\u4ee5\u8bfb\u4e86\uff0c\u800c AIO \u5219\u662f\u5728\u6570\u636e\u51c6\u5907\u597d\u4e4b\u540e\uff0c\u624d\u4f1a\u901a\u77e5\u6570\u636e\u4f7f\u7528\u8005\uff0c\u8fd9\u6837\u4f7f\u7528\u8005\u5c31\u4e0d\u9700\u8981\u4e0d\u505c\u5730\u8f6e\u8be2\u4e86\u3002\u5f53\u7136 AIO \u7684\u5f02\u6b65\u7279\u6027\u5e76\u4e0d\u662f Java \u5b9e\u73b0\u7684\u4f2a\u5f02\u6b65\uff0c\u800c\u662f\u4f7f\u7528\u4e86\u7cfb\u7edf\u5e95\u5c42 API \u7684\u652f\u6301\uff0c\u5728 Linux\/Unix \u7cfb\u7edf\u4e0b\uff0c\u91c7\u7528\u4e86 epoll IO \u6a21\u578b\uff0c\u800c windows \u7cfb\u7edf\u4e0b\u5219\u662f\u4f7f\u7528\u4e86 IOCP \u6a21\u578b\u3002<\/p>\n<h2>\u533a\u522b\u4e0e\u5bf9\u6bd4<\/h2>\n<p>BIO\u3001NIO\u3001AIO \u4e09\u8005\u4e4b\u95f4\u7684\u533a\u522b\u4e0e\u8054\u7cfb\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img decoding=\"async\" style=\"width: 632px;height: 199px\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1fzs4ormcayj20hk05jt9d.jpg\" alt=\"BIO\u3001NIO\u3001AIO\"><\/p>\n<p>\u5173\u4e8e IO \u6a21\u578b\u5212\u5206\uff0c\u4e0d\u662f\u672c\u6587\u7684\u5173\u6ce8\u70b9\u3002\u5927\u5bb6\u53ef\u4ee5\u591a\u770b\u770b\u300aUnix\u7f51\u7edc\u7f16\u7a0b\u300b\u8fd9\u672c\u4e66\u3002<\/p>\n<p><img decoding=\"async\" style=\"width: 803px;height: 189px\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/wx1.sinaimg.cn\/large\/8fa5dcfcgy1fzs4s5973ij20mb059myo.jpg\" alt=\"IO \u6a21\u578b\u7684\u5212\u5206\"><\/p>\n<p>\u6700\u540e\uff0c\u89e3\u91ca\u51e0\u4e2a\u540d\u8bcd\u3002<\/p>\n<ul>\n<li>\u540c\u6b65\uff1a\u6307\u7684\u662f\u7528\u6237\u8fdb\u7a0b\u89e6\u53d1 I O\u64cd\u4f5c\u5e76\u7b49\u5f85\u6216\u8005\u8f6e\u8be2\u7684\u53bb\u67e5\u770b IO \u64cd\u4f5c\u662f\u5426\u5c31\u7eea<\/li>\n<li>\u5f02\u6b65\uff1a\u5f02\u6b65\u662f\u6307\u7528\u6237\u8fdb\u7a0b\u89e6\u53d1 IO \u64cd\u4f5c\u4ee5\u540e\u4fbf\u5f00\u59cb\u505a\u81ea\u5df1\u7684\u4e8b\u60c5\uff0c\u800c\u5f53 IO \u64cd\u4f5c\u5df2\u7ecf\u5b8c\u6210\u7684\u65f6\u5019\u4f1a\u5f97\u5230 IO \u5b8c\u6210\u7684\u901a\u77e5\uff08\u5f02\u6b65\u7684\u7279\u70b9\u5c31\u662f\u901a\u77e5\uff09<\/li>\n<li>\u963b\u585e\uff1a\u6240\u8c13\u963b\u585e\u65b9\u5f0f\u7684\u610f\u601d\u662f\u6307\uff0c\u5f53\u8bd5\u56fe\u5bf9\u8be5\u6587\u4ef6\u63cf\u8ff0\u7b26\u8fdb\u884c\u8bfb\u5199\u65f6\uff0c\u5982\u679c\u5f53\u65f6\u6ca1\u6709\u4e1c\u897f\u53ef\u8bfb\uff0c\u6216\u8005\u6682\u65f6\u4e0d\u53ef\u5199\uff0c\u7a0b\u5e8f\u5c31\u8fdb\u5165\u7b49\u5f85\u72b6\u6001\uff0c\u76f4\u5230\u6709\u4e1c\u897f\u53ef\u8bfb\u6216\u8005\u53ef\u5199\u4e3a\u6b62<\/li>\n<li>\u975e\u963b\u585e\uff1a\u975e\u963b\u585e\u72b6\u6001\u4e0b\uff0c\u5982\u679c\u6ca1\u6709\u4e1c\u897f\u53ef\u8bfb\uff0c\u6216\u8005\u4e0d\u53ef\u5199\uff0c\u8bfb\u5199\u51fd\u6570\u9a6c\u4e0a\u8fd4\u56de\uff0c\u800c\u4e0d\u4f1a\u7b49\u5f85<\/li>\n<\/ul>\n<h2>\u53c2\u8003\u8d44\u6599<\/h2>\n<ul>\n<li><a title=\"Understanding of BIO, NIO, and AIO in Java\" href=\"http:\/\/www.codeblogbt.com\/archives\/78211\" target=\"_blank\" rel=\"noopener noreferrer\" name=\"Understanding of BIO, NIO, and AIO in Java\">Understanding of BIO, NIO, and AIO in Java<\/a><\/li>\n<li><a title=\"BIO\/NIO\/AIO\" href=\"https:\/\/codejuan.gitbooks.io\/java_interview\/io\/syn-ays-blocked\/bio-nio-aio.html\" target=\"_blank\" rel=\"noopener noreferrer\" name=\"BIO\/NIO\/AIO\">BIO\/NIO\/AIO<\/a><\/li>\n<li><a title=\"Java BIO\u3001NIO\u3001AIO\" href=\"http:\/\/blog.tanpeng.net\/2017\/07\/30\/Java-BIO-NIO-AIO\/\" target=\"_blank\" rel=\"noopener noreferrer\" name=\"Java BIO\u3001NIO\u3001AIO\">Java BIO\u3001NIO\u3001AIO<\/a><\/li>\n<li><a title=\"Java NIO\u3001BIO\u3001 AIO \u4e0e \u540c\u6b65\u3001\u963b\u585e\u3001\u975e\u963b\u585e\u3001\u5f02\u6b65IO \u7b80\u6790\" href=\"https:\/\/www.yuque.com\/page\/luan.ma\/io-model\" target=\"_blank\" rel=\"noopener noreferrer\" name=\"Java NIO\u3001BIO\u3001 AIO \u4e0e \u540c\u6b65\u3001\u963b\u585e\u3001\u975e\u963b\u585e\u3001\u5f02\u6b65IO \u7b80\u6790\">Java NIO\u3001BIO\u3001 AIO \u4e0e 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[&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[899,252,919,112,510],"class_list":["post-3834","post","type-post","status-publish","format-standard","hentry","category-java","tag-io","tag-nio","tag-spring-io-platform","tag-tomcat","tag-510"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/3834","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3834"}],"version-history":[{"count":3,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/3834\/revisions"}],"predecessor-version":[{"id":4823,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/3834\/revisions\/4823"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3834"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3834"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3834"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}