{"id":10006179,"date":"2022-08-11T18:16:09","date_gmt":"2022-08-11T10:16:09","guid":{"rendered":"https:\/\/ityet.com\/?p=10006179"},"modified":"2022-08-11T18:16:09","modified_gmt":"2022-08-11T10:16:09","slug":"%e3%80%90java%e9%9d%a2%e8%af%95%e3%80%91%e4%bb%80%e4%b9%88%e6%98%afio%e7%9a%84%e5%a4%9a%e8%b7%af%e5%a4%8d%e7%94%a8%e6%9c%ba%e5%88%b6%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006179","title":{"rendered":"\u3010Java\u9762\u8bd5\u3011\u4ec0\u4e48\u662fIO\u7684\u591a\u8def\u590d\u7528\u673a\u5236\uff1f"},"content":{"rendered":"<blockquote>\n<p>\u201c\u4ec0\u4e48\u662fIO\u7684\u591a\u8def\u590d\u7528\u673a\u5236\uff1f\u201d<\/p>\n<p>\u8fd9\u662f\u4e00\u9053\u5e74\u85aa50W\u7684\u9762\u8bd5\u9898\uff0c\u5f88\u9057\u61be\uff0c99%\u7684\u4eba\u90fd\u56de\u7b54\u4e0d\u51fa\u6765\u3002<\/p>\n<p>\u5927\u5bb6\u597d\uff0c\u6211\u662fMic\uff0c\u4e00\u4e2a\u5de5\u4f5c\u4e8614\u5e74\u7684Java\u7a0b\u5e8f\u5458\u3002<\/p>\n<p>\u4eca\u5929\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u4e00\u9053\u7f51\u7edcIO\u7684\u9762\u8bd5\u9898\u3002<\/p>\n<p>\u8fd9\u9053\u9898\u76ee\u7684\u6587\u5b57\u56de\u7b54\u5df2\u7ecf\u6574\u7406\u5230\u4e8615W\u5b57\u7684\u9762\u8bd5\u6587\u6863\u91cc\u9762\uff0c\u5927\u5bb6\u53ef\u4ee5S\u6211\u9886\u53d6\u3002<\/p>\n<p>\u4e0b\u9762\u770b\u770b\u9ad8\u624b\u7684\u56de\u7b54\u3002<\/p>\n<\/blockquote>\n<h2>\u9ad8\u624b\uff1a<\/h2>\n<p>IO\u591a\u8def\u590d\u7528\u673a\u5236\uff0c\u6838\u5fc3\u601d\u60f3\u662f\u8ba9\u5355\u4e2a\u7ebf\u7a0b\u53bb\u76d1\u89c6\u591a\u4e2a\u8fde\u63a5\uff0c\u4e00\u65e6\u67d0\u4e2a\u8fde\u63a5\u5c31\u7eea\uff0c\u4e5f\u5c31\u662f\u89e6\u53d1\u4e86\u8bfb\/\u5199\u4e8b\u4ef6\u3002<\/p>\n<p>\u5c31\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\uff0c\u53bb\u83b7\u53d6\u8fd9\u4e2a\u5c31\u7eea\u7684\u8fde\u63a5\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u5728\u5e94\u7528\u7a0b\u5e8f\u91cc\u9762\u53ef\u4ee5\u4f7f\u7528\u5355\u4e2a\u7ebf\u7a0b\u540c\u65f6\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\uff0c\u5728\u5bf9\u7cfb\u7edf\u8d44\u6e90\u6d88\u8017\u8f83\u5c11\u7684\u60c5\u51b5\u4e0b\u63d0\u5347\u670d\u52a1\u7aef\u7684\u94fe\u63a5\u5904\u7406\u6570\u91cf\u3002<\/p>\n<p>\u5728IO\u591a\u8def\u590d\u7528\u673a\u5236\u7684\u5b9e\u73b0\u539f\u7406\u4e2d\uff0c\u5ba2\u6237\u7aef\u8bf7\u6c42\u5230\u670d\u52a1\u7aef\u540e\uff0c\u6b64\u65f6\u5ba2\u6237\u7aef\u5728\u4f20\u8f93\u6570\u636e\u8fc7\u7a0b\u4e2d\uff0c\u4e3a\u4e86\u907f\u514dServer\u7aef\u5728read\u5ba2\u6237\u7aef\u6570\u636e\u8fc7\u7a0b\u4e2d\u963b\u585e\uff0c\u670d\u52a1\u7aef\u4f1a\u628a\u8be5\u8bf7\u6c42\u6ce8\u518c\u5230Selector\u590d\u8def\u5668\u4e0a\uff0c\u670d\u52a1\u7aef\u6b64\u65f6\u4e0d\u9700\u8981\u7b49\u5f85\uff0c\u53ea\u9700\u8981\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u901a\u8fc7selector.select()\u963b\u585e\u8f6e\u8be2\u590d\u8def\u5668\u4e0a\u5c31\u7eea\u7684channel\u5373\u53ef\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u67d0\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u6570\u636e\u4f20\u8f93\u5b8c\u6210\uff0c\u90a3\u4e48select()\u65b9\u6cd5\u4f1a\u8fd4\u56de\u5c31\u7eea\u7684channel\uff0c\u7136\u540e\u6267\u884c\u76f8\u5173\u7684\u5904\u7406\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVcVsYJ\" alt=\"image-20220710155428180\" title=\"image-20220710155428180\" loading=\"lazy\"><\/p>\n<p>\u5e38\u89c1\u7684IO\u591a\u8def\u590d\u7528\u673a\u5236\u7684\u5b9e\u73b0\u65b9\u5f0f\u6709\uff1a select \u3001poll\u3001epoll\u3002<\/p>\n<p>\u8fd9\u4e9b\u90fd\u662fLinux\u7cfb\u7edf\u63d0\u4f9b\u7684IO\u590d\u7528\u673a\u5236\u7684\u5b9e\u73b0\uff0c\u5176\u4e2dselect\u548cpoll\u662f\u57fa\u4e8e\u8f6e\u8be2\u7684\u65b9\u5f0f\u53bb\u83b7\u53d6\u5c31\u7eea\u8fde\u63a5\u3002<\/p>\n<p>\u800cepoll\u662f\u57fa\u4e8e\u4e8b\u4ef6\u9a71\u52a8\u7684\u65b9\u5f0f\u83b7\u53d6\u5c31\u7eea\u8fde\u63a5\u3002\u4ece\u6027\u80fd\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u57fa\u4e8e\u4e8b\u4ef6\u9a71\u52a8\u7684\u65b9\u5f0f\u8981\u4f18\u4e8e\u8f6e\u8be2\u7684\u65b9\u5f0f\u3002<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>IO\u591a\u8def\u590d\u7528\u673a\u5236\uff0c\u662f\u975e\u5e38\u91cd\u8981\u7684\u7f51\u7edc\u901a\u4fe1\u57fa\u7840\u3002<\/p>\n<p>\u5728\u5e73\u65f6\u7684\u4e1a\u52a1\u5f00\u53d1\u4e2d\uff0c\u4f7f\u7528\u6bd4\u8f83\u5c11\uff0c\u4f46\u662f\u5728\u4e2d\u95f4\u4ef6\u91cc\u9762\u4f5c\u4e3a\u57fa\u7840\u901a\u4fe1\u6a21\u578b\uff0c\u662f\u6bcf\u4e2a\u9ad8\u7ea7\u5de5\u7a0b\u5e08\u5fc5\u987b\u8981\u638c\u63e1\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u5927\u5bb6\u8bb0\u5f97\u70b9\u8d5e\u3001\u6536\u85cf\u52a0\u5173\u6ce8\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVcZhSx\" alt=\"file\" title=\"file\" loading=\"lazy\"><\/p>\n<blockquote><p>\u7248\u6743\u58f0\u660e\uff1a\u672c\u535a\u5ba2\u6240\u6709\u6587\u7ae0\u9664\u7279\u522b\u58f0\u660e\u5916\uff0c\u5747\u91c7\u7528 CC BY-NC-SA 4.0 \u8bb8\u53ef\u534f\u8bae\u3002\u8f6c\u8f7d\u8bf7\u6ce8\u660e\u6765\u81ea <code>Mic\u5e26\u4f60\u5b66\u67b6\u6784<\/code>\uff01<br \/>\u5982\u679c\u672c\u7bc7\u6587\u7ae0\u5bf9\u60a8\u6709\u5e2e\u52a9\uff0c\u8fd8\u8bf7\u5e2e\u5fd9\u70b9\u4e2a\u5173\u6ce8\u548c\u8d5e\uff0c\u60a8\u7684\u575a\u6301\u662f\u6211\u4e0d\u65ad\u521b\u4f5c\u7684\u52a8\u529b\u3002\u6b22\u8fce\u5173\u6ce8\u540c\u540d\u5fae\u4fe1\u516c\u4f17\u53f7\u83b7\u53d6\u66f4\u591a\u6280\u672f\u5e72\u8d27\uff01<\/p><\/blockquote>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042304501\">https:\/\/segmentfault.com\/a\/1190000042304501<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u201c\u4ec0\u4e48\u662fIO\u7684\u591a\u8def\u590d\u7528\u673a\u5236\uff1f\u201d \u8fd9\u662f\u4e00\u9053\u5e74\u85aa50W\u7684\u9762\u8bd5\u9898\uff0c\u5f88\u9057\u61be\uff0c99%\u7684\u4eba\u90fd\u56de\u7b54\u4e0d\u51fa\u6765\u3002 \u5927\u5bb6\u597d\uff0c\u6211\u662fMi [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006179","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006179","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006179"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006179\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006179"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006179"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006179"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}