{"id":1520,"date":"2021-12-12T21:15:38","date_gmt":"2021-12-12T13:15:38","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=1520"},"modified":"2021-12-12T21:15:38","modified_gmt":"2021-12-12T13:15:38","slug":"java%e7%ba%bf%e7%a8%8b%e6%b1%a0","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=1520","title":{"rendered":"java\u7ebf\u7a0b\u6c60"},"content":{"rendered":"\n<p><span class=\"has-inline-color has-bright-red-color\">corePoolSize<\/span>\u00a0:\u7ebf\u7a0b\u6c60\u7684\u6838\u5fc3\u6c60\u5927\u5c0f\uff0c\u5728\u521b\u5efa\u7ebf\u7a0b\u6c60\u4e4b\u540e\uff0c\u7ebf\u7a0b\u6c60\u9ed8\u8ba4\u6ca1\u6709\u4efb\u4f55\u7ebf\u7a0b\u3002<\/p>\n\n\n\n<p>\u5f53\u6709\u4efb\u52a1\u8fc7\u6765\u7684\u65f6\u5019\u624d\u4f1a\u53bb\u521b\u5efa\u521b\u5efa\u7ebf\u7a0b\u6267\u884c\u4efb\u52a1\u3002\u6362\u4e2a\u8bf4\u6cd5\uff0c\u7ebf\u7a0b\u6c60\u521b\u5efa\u4e4b\u540e\uff0c\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u4e3a0\uff0c\u5f53\u4efb\u52a1\u8fc7\u6765\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u53bb\u6267\u884c\uff0c\u76f4\u5230\u7ebf\u7a0b\u6570\u8fbe\u5230corePoolSize&nbsp;\u4e4b\u540e\uff0c\u5c31\u4f1a\u88ab\u5230\u8fbe\u7684\u4efb\u52a1\u653e\u5728\u961f\u5217\u4e2d\u3002\uff08\u6ce8\u610f\u662f\u5230\u8fbe\u7684\u4efb\u52a1\uff09\u3002\u6362\u53e5\u66f4\u7cbe\u70bc\u7684\u8bdd\uff1acorePoolSize&nbsp;\u8868\u793a\u5141\u8bb8\u7ebf\u7a0b\u6c60\u4e2d\u5141\u8bb8\u540c\u65f6\u8fd0\u884c\u7684\u6700\u5927\u7ebf\u7a0b\u6570\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u6267\u884c\u4e86\u7ebf\u7a0b\u6c60\u7684prestartAllCoreThreads()\u65b9\u6cd5\uff0c\u7ebf\u7a0b\u6c60\u4f1a\u63d0\u524d\u521b\u5efa\u5e76\u542f\u52a8\u6240\u6709\u6838\u5fc3\u7ebf\u7a0b\u3002<\/p>\n\n\n\n<p><span class=\"has-inline-color has-bright-red-color\">maximumPoolSize<\/span>\u00a0:\u7ebf\u7a0b\u6c60\u5141\u8bb8\u7684\u6700\u5927\u7ebf\u7a0b\u6570\uff0c\u4ed6\u8868\u793a\u6700\u5927\u80fd\u521b\u5efa\u591a\u5c11\u4e2a\u7ebf\u7a0b\u3002maximumPoolSize\u80af\u5b9a\u662f\u5927\u4e8e\u7b49\u4e8ecorePoolSize\u3002<\/p>\n\n\n\n<p><span class=\"has-inline-color has-bright-red-color\">keepAliveTime<\/span>\u00a0:\u8868\u793a\u7ebf\u7a0b\u6ca1\u6709\u4efb\u52a1\u65f6\u6700\u591a\u4fdd\u6301\u591a\u4e45\u7136\u540e\u505c\u6b62\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u53ea\u6709\u7ebf\u7a0b\u6c60\u4e2d\u7ebf\u7a0b\u6570\u5927\u4e8ecorePoolSize\u00a0\u65f6\uff0ckeepAliveTime\u00a0\u624d\u4f1a\u8d77\u4f5c\u7528\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5f53\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u5927\u4e8ecorePoolSize\uff0c\u5e76\u4e14\u4e00\u4e2a\u7ebf\u7a0b\u7a7a\u95f2\u65f6\u95f4\u8fbe\u5230\u4e86keepAliveTime\uff0c\u90a3\u4e48\u5c31\u662fshutdown\u3002<\/p>\n\n\n\n<p><span class=\"has-inline-color has-bright-red-color\">Unit<\/span>:keepAliveTime\u00a0\u7684\u5355\u4f4d\u3002<\/p>\n\n\n\n<p><span class=\"has-inline-color has-bright-red-color\">workQueue<\/span>\u00a0\uff1a\u4e00\u4e2a\u963b\u585e\u961f\u5217\uff0c\u7528\u6765\u5b58\u50a8\u7b49\u5f85\u6267\u884c\u7684\u4efb\u52a1\uff0c\u5f53\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u8d85\u8fc7\u5b83\u7684corePoolSize\u7684\u65f6\u5019\uff0c\u7ebf\u7a0b\u4f1a\u8fdb\u5165\u963b\u585e\u961f\u5217\u8fdb\u884c\u963b\u585e\u7b49\u5f85\u3002\u901a\u8fc7workQueue\uff0c\u7ebf\u7a0b\u6c60\u5b9e\u73b0\u4e86\u963b\u585e\u529f\u80fd<\/p>\n\n\n\n<p><span class=\"has-inline-color has-bright-red-color\">threadFactory<\/span>\u00a0\uff1a\u7ebf\u7a0b\u5de5\u5382\uff0c\u7528\u6765\u521b\u5efa\u7ebf\u7a0b\u3002<\/p>\n\n\n\n<p><span class=\"has-inline-color has-bright-red-color\">handler<\/span>\u00a0:\u8868\u793a\u5f53\u62d2\u7edd\u5904\u7406\u4efb\u52a1\u65f6\u7684\u7b56\u7565\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><strong>\u4efb\u52a1\u7f13\u5b58\u961f\u5217<\/strong><\/p>\n\n\n\n<p>\u5728\u524d\u9762\u6211\u4eec\u591a\u6b21\u63d0\u5230\u4e86\u4efb\u52a1\u7f13\u5b58\u961f\u5217\uff0c\u5373workQueue\uff0c\u5b83\u7528\u6765\u5b58\u653e\u7b49\u5f85\u6267\u884c\u7684\u4efb\u52a1\u3002<\/p>\n\n\n\n<p>workQueue\u7684\u7c7b\u578b\u4e3aBlockingQueue&lt;Runnable&gt;\uff0c\u901a\u5e38\u53ef\u4ee5\u53d6\u4e0b\u9762\u4e09\u79cd\u7c7b\u578b\uff1a<\/p>\n\n\n\n<p>1\uff09\u6709\u754c\u4efb\u52a1\u961f\u5217ArrayBlockingQueue\uff1a\u57fa\u4e8e\u6570\u7ec4\u7684\u5148\u8fdb\u5148\u51fa\u961f\u5217\uff0c\u6b64\u961f\u5217\u521b\u5efa\u65f6\u5fc5\u987b\u6307\u5b9a\u5927\u5c0f\uff1b<\/p>\n\n\n\n<p>2\uff09\u65e0\u754c\u4efb\u52a1\u961f\u5217LinkedBlockingQueue\uff1a\u57fa\u4e8e\u94fe\u8868\u7684\u5148\u8fdb\u5148\u51fa\u961f\u5217\uff0c\u5982\u679c\u521b\u5efa\u65f6\u6ca1\u6709\u6307\u5b9a\u6b64\u961f\u5217\u5927\u5c0f\uff0c\u5219\u9ed8\u8ba4\u4e3aInteger.MAX_VALUE\uff1b<\/p>\n\n\n\n<p>3\uff09\u76f4\u63a5\u63d0\u4ea4\u961f\u5217synchronousQueue\uff1a\u8fd9\u4e2a\u961f\u5217\u6bd4\u8f83\u7279\u6b8a\uff0c\u5b83\u4e0d\u4f1a\u4fdd\u5b58\u63d0\u4ea4\u7684\u4efb\u52a1\uff0c\u800c\u662f\u5c06\u76f4\u63a5\u65b0\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u6765\u6267\u884c\u65b0\u6765\u7684\u4efb\u52a1\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u62d2\u7edd\u7b56\u7565<\/h3>\n\n\n\n<p>AbortPolicy:\u4e22\u5f03\u4efb\u52a1\u5e76\u629b\u51faRejectedExecutionException<\/p>\n\n\n\n<p>CallerRunsPolicy\uff1a\u53ea\u8981\u7ebf\u7a0b\u6c60\u672a\u5173\u95ed\uff0c\u8be5\u7b56\u7565\u76f4\u63a5\u5728\u8c03\u7528\u8005(\u63d0\u4ea4\u4efb\u52a1\u7684\u7ebf\u7a0b)\u7ebf\u7a0b\u4e2d(\u6bd4\u5982main\u7ebf\u7a0b\u4e2d)\uff0c\u8fd0\u884c\u5f53\u524d\u88ab\u4e22\u5f03\u7684\u4efb\u52a1\u3002\u663e\u7136\u8fd9\u6837\u505a\u4e0d\u4f1a\u771f\u7684\u4e22\u5f03\u4efb\u52a1\uff0c\u4f46\u662f\uff0c\u4efb\u52a1\u63d0\u4ea4\u7ebf\u7a0b\u7684\u6027\u80fd\u6781\u6709\u53ef\u80fd\u4f1a\u6025\u5267\u4e0b\u964d\u3002<\/p>\n\n\n\n<p>DiscardOldestPolicy\uff1a\u4e22\u5f03\u961f\u5217\u4e2d\u6700\u8001\u7684\u4e00\u4e2a\u8bf7\u6c42\uff0c\u4e5f\u5c31\u662f\u5373\u5c06\u88ab\u6267\u884c\u7684\u4e00\u4e2a\u4efb\u52a1\uff0c\u5e76\u5c1d\u8bd5\u518d\u6b21\u63d0\u4ea4\u5f53\u524d\u4efb\u52a1\u3002<\/p>\n\n\n\n<p>DiscardPolicy\uff1a\u4e22\u5f03\u4efb\u52a1\uff0c\u4e0d\u505a\u4efb\u4f55\u5904\u7406\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u5904\u7406\u7b56\u7565\uff1a<\/h3>\n\n\n\n<p>\u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u76ee\u5c0f\u4e8ecorePoolSize\uff0c\u5219\u6bcf\u6765\u4e00\u4e2a\u4efb\u52a1\uff0c\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u53bb\u6267\u884c\u8fd9\u4e2a\u4efb\u52a1\uff1b<\/p>\n\n\n\n<p>\u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u76ee&gt;=corePoolSize\uff0c\u5219\u6bcf\u6765\u4e00\u4e2a\u4efb\u52a1\uff0c\u4f1a\u5c1d\u8bd5\u5c06\u5176\u6dfb\u52a0\u5230\u4efb\u52a1\u7f13\u5b58\u961f\u5217\u5f53\u4e2d\uff0c\u82e5\u6dfb\u52a0\u6210\u529f\uff0c\u5219\u8be5\u4efb\u52a1\u4f1a\u7b49\u5f85\u7a7a\u95f2\u7ebf\u7a0b\u5c06\u5176\u53d6\u51fa\u53bb\u6267\u884c\uff1b\u82e5\u6dfb\u52a0\u5931\u8d25\uff08\u4e00\u822c\u6765\u8bf4\u662f\u4efb\u52a1\u7f13\u5b58\u961f\u5217\u5df2\u6ee1\uff09\uff0c\u5219\u4f1a\u5c1d\u8bd5\u521b\u5efa\u65b0\u7684\u7ebf\u7a0b\u53bb\u6267\u884c\u8fd9\u4e2a\u4efb\u52a1\uff1b\u5982\u679c\u5f53\u524d\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u76ee\u8fbe\u5230maximumPoolSize\uff0c\u5219\u4f1a\u91c7\u53d6\u4efb\u52a1\u62d2\u7edd\u7b56\u7565\u8fdb\u884c\u5904\u7406\uff1b<\/p>\n\n\n\n<p>\u5982\u679c\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u91cf\u5927\u4e8e corePoolSize\u65f6\uff0c\u5982\u679c\u67d0\u7ebf\u7a0b\u7a7a\u95f2\u65f6\u95f4\u8d85\u8fc7keepAliveTime\uff0c\u7ebf\u7a0b\u5c06\u88ab\u7ec8\u6b62\uff0c\u76f4\u81f3\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u6570\u76ee\u4e0d\u5927\u4e8ecorePoolSize\uff1b\u5982\u679c\u5141\u8bb8\u4e3a\u6838\u5fc3\u6c60\u4e2d\u7684\u7ebf\u7a0b\u8bbe\u7f6e\u5b58\u6d3b\u65f6\u95f4\uff0c\u90a3\u4e48\u6838\u5fc3\u6c60\u4e2d\u7684\u7ebf\u7a0b\u7a7a\u95f2\u65f6\u95f4\u8d85\u8fc7keepAliveTime\uff0c\u7ebf\u7a0b\u4e5f\u4f1a\u88ab\u7ec8\u6b62\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u7ebf\u7a0b\u6c60\u7684\u5173\u95ed<\/strong><\/p>\n\n\n\n<p>ThreadPoolExecutor\u63d0\u4f9b\u4e86\u4e24\u4e2a\u65b9\u6cd5\uff0c\u7528\u4e8e\u7ebf\u7a0b\u6c60\u7684\u5173\u95ed\uff0c\u5206\u522b\u662fshutdown()\u548cshutdownNow()\uff0c\u5176\u4e2d\uff1a<\/p>\n\n\n\n<p>shutdown()\uff1a\u4e0d\u4f1a\u7acb\u5373\u7ec8\u6b62\u7ebf\u7a0b\u6c60\uff0c\u800c\u662f\u8981\u7b49\u6240\u6709\u4efb\u52a1\u7f13\u5b58\u961f\u5217\u4e2d\u7684\u4efb\u52a1\u90fd\u6267\u884c\u5b8c\u540e\u624d\u7ec8\u6b62\uff0c\u4f46\u518d\u4e5f\u4e0d\u4f1a\u63a5\u53d7\u65b0\u7684\u4efb\u52a1<\/p>\n\n\n\n<p>shutdownNow()\uff1a\u7acb\u5373\u7ec8\u6b62\u7ebf\u7a0b\u6c60\uff0c\u5e76\u5c1d\u8bd5\u6253\u65ad\u6b63\u5728\u6267\u884c\u7684\u4efb\u52a1\uff0c\u5e76\u4e14\u6e05\u7a7a\u4efb\u52a1\u7f13\u5b58\u961f\u5217\uff0c\u8fd4\u56de\u5c1a\u672a\u6267\u884c\u7684\u4efb\u52a1<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>corePoolSize\u00a0:\u7ebf\u7a0b\u6c60\u7684\u6838\u5fc3\u6c60\u5927\u5c0f\uff0c\u5728\u521b\u5efa\u7ebf\u7a0b\u6c60\u4e4b\u540e\uff0c\u7ebf\u7a0b\u6c60\u9ed8\u8ba4\u6ca1\u6709\u4efb\u4f55\u7ebf\u7a0b\u3002 \u5f53\u6709\u4efb\u52a1\u8fc7\u6765\u7684\u65f6\u5019 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1520"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1520"}],"version-history":[{"count":7,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1520\/revisions"}],"predecessor-version":[{"id":1527,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1520\/revisions\/1527"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1520"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1520"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}