{"id":3654,"date":"2025-04-26T18:38:06","date_gmt":"2025-04-26T10:38:06","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3654"},"modified":"2025-04-26T18:38:06","modified_gmt":"2025-04-26T10:38:06","slug":"threadpoolexecutor-%e6%a0%b8%e5%bf%83%e6%ba%90%e7%a0%81%e9%80%bb%e8%be%91%e8%ae%b2%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/04\/26\/threadpoolexecutor-%e6%a0%b8%e5%bf%83%e6%ba%90%e7%a0%81%e9%80%bb%e8%be%91%e8%ae%b2%e8%a7%a3\/","title":{"rendered":"ThreadPoolExecutor \u6838\u5fc3\u6e90\u7801\u903b\u8f91\u8bb2\u89e3"},"content":{"rendered":"\n

\u6211\u8fd9\u5c31\u7ed9\u4f60\u6253\u5305\u4e00\u7248\u8d85\u6e05\u6670\u53c8\u80fd\u80cc\u7684\u300aThreadPoolExecutor \u6838\u5fc3\u6e90\u7801\u903b\u8f91\u8bb2\u89e3\u300b<\/strong>\uff0c\u7b80\u5355\u76f4\u63a5\uff0c\u9762\u8bd5\u4e00\u8bb2\u5c31\u5f88\u80fd\u6253\uff01<\/p>\n\n\n\n

\n\n\n\n

1. execute() \u65b9\u6cd5\u5185\u90e8\u6267\u884c\u987a\u5e8f<\/h2>\n\n\n\n

\u5f53\u4f60\u8c03\u7528 executor.execute(Runnable task)<\/code> \u63d0\u4ea4\u4e00\u4e2a\u4efb\u52a1\u65f6\uff0c\u5185\u90e8\u6d41\u7a0b\u5c31\u662f\u4e0b\u9762\u8fd9\u5957\u903b\u8f91\uff1a<\/p>\n\n\n\n

\n\n\n\n

\u6807\u51c6\u4e09\u6b65\u8d70\uff1a<\/strong><\/p>\n\n\n\n

    \n
  1. \u5982\u679c\u8fd0\u884c\u7684\u7ebf\u7a0b\u6570 < corePoolSize\uff0c\u7acb\u523b\u521b\u5efa\u65b0\u7ebf\u7a0b\u6267\u884c\u4efb\u52a1\u3002<\/strong><\/li>\n\n\n\n
  2. \u5982\u679c\u7ebf\u7a0b\u6570 \u2265 corePoolSize\uff0c\u4efb\u52a1\u52a0\u5165\u5230\u4efb\u52a1\u961f\u5217\uff08workQueue\uff09\u7b49\u5f85\u6267\u884c\u3002<\/strong><\/li>\n\n\n\n
  3. \u5982\u679c\u961f\u5217\u4e5f\u6ee1\u4e86\uff0c\u4e14\u7ebf\u7a0b\u6570 < maximumPoolSize\uff0c\u5219\u521b\u5efa\u65b0\u7ebf\u7a0b\u6267\u884c\u4efb\u52a1\u3002<\/strong><\/li>\n\n\n\n
  4. \u5982\u679c\u7ebf\u7a0b\u6570\u5df2\u5230 maximumPoolSize \u4e14\u961f\u5217\u4e5f\u6ee1\u4e86\uff0c\u6267\u884c\u62d2\u7edd\u7b56\u7565\uff08RejectedExecutionHandler\uff09\u3002<\/strong><\/li>\n<\/ol>\n\n\n\n
    \n\n\n\n

    \u5bf9\u5e94\u6e90\u7801\uff08\u6458\u6284\u6838\u5fc3\u7248\uff0c\u7406\u89e3\u5373\u53ef\uff0c\u4e0d\u7528\u6b7b\u8bb0\uff09<\/strong>\uff1a<\/p>\n\n\n\n

    public void execute(Runnable command) {\n    if (command == null)\n        throw new NullPointerException();\n\n    int c = ctl.get();\n    if (workerCountOf(c) < corePoolSize) {  \n        if (addWorker(command, true))\n            return;\n        c = ctl.get();\n    }\n\n    if (isRunning(c) && workQueue.offer(command)) { \n        int recheck = ctl.get();\n        if (!isRunning(recheck) && remove(command))\n            reject(command);\n        else if (workerCountOf(recheck) == 0)\n            addWorker(null, false);\n    }\n    else if (!addWorker(command, false))\n        reject(command);\n}<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    2. \u4e3a\u4ec0\u4e48\u662f\u8fd9\u4e2a\u987a\u5e8f\uff1f\uff08\u9762\u8bd5\u5b98\u5e38\u95ee\uff09<\/h2>\n\n\n\n
    \u7b54\uff1a<\/strong><\/p>\n\n\n\n
    \n
    \u8fd9\u6837\u8bbe\u8ba1\u53ef\u4ee5\u6700\u5927\u7a0b\u5ea6\u5730\u63d0\u9ad8\u7ebf\u7a0b\u5229\u7528\u7387\uff0c\u907f\u514d\u9891\u7e41\u5730\u521b\u5efa\u548c\u9500\u6bc1\u7ebf\u7a0b\uff0c\u540c\u65f6\u8fd8\u80fd\u6709\u6548\u63a7\u5236\u5185\u5b58\u5360\u7528\u548cCPU\u8d44\u6e90\uff0c\u786e\u4fdd\u7cfb\u7edf\u7a33\u5b9a\u6027\u3002<\/p>\n<\/blockquote>\n\n\n\n
    \u66f4\u5177\u4f53\u5730\u8bf4\uff1a<\/p>\n\n\n\n
      \n
    • \u4f18\u5148\u4f7f\u7528\u6838\u5fc3\u7ebf\u7a0b\u5904\u7406\u4efb\u52a1<\/strong> \u2794 \u5feb\u901f\u54cd\u5e94\u8bf7\u6c42<\/li>\n\n\n\n
    • \u4efb\u52a1\u5806\u79ef\u65f6\u5229\u7528\u961f\u5217\u7f13\u51b2<\/strong> \u2794 \u63a7\u5236\u7ebf\u7a0b\u6570\u91cf\uff0c\u907f\u514d\u7206\u70b8\u589e\u957f<\/li>\n\n\n\n
    • \u6781\u7aef\u60c5\u51b5\u4e0b\u518d\u6269\u5c55\u6700\u5927\u7ebf\u7a0b\u6570<\/strong> \u2794 \u515c\u5e95\u5904\u7406\u9ad8\u5cf0\u8bf7\u6c42<\/li>\n\n\n\n
    • \u90fd\u625b\u4e0d\u4f4f\u65f6\u62d2\u7edd\u65b0\u4efb\u52a1<\/strong> \u2794 \u4fdd\u7cfb\u7edf\u7a33\u5b9a\uff0c\u9632\u6b62\u96ea\u5d29<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      3. \u8d85\u5feb\u901f\u8bb0\u5fc6\u7248\u53e3\u8bc0<\/h2>\n\n\n\n
      \u76f4\u63a5\u9001\u4f60\u4e00\u4e2a\u53e3\u8bc0\uff0c\u8bb0\u4e0b\u6765\uff0c\u56de\u7b54\u8d85\u5feb\uff1a<\/p>\n\n\n\n
      \u2705 \u5148\u52a0\u6838\u5fc3 \u2794 \u8fdb\u961f\u5217 \u2794 \u518d\u6269\u5bb9 \u2794 \u6700\u540e\u62d2\u7edd<\/strong><\/p>\n\n\n\n
      \n\n\n\n
      4. \u5c0f\u7ec6\u8282\uff08\u5982\u679c\u9762\u8bd5\u5b98\u5f88\u7ec6\u95ee\u7684\u8bdd\uff09<\/h2>\n\n\n\n
        \n
      • addWorker(task, true)<\/code> \u2794 true<\/code> \u8868\u793a\u7528\u6838\u5fc3\u7ebf\u7a0b<\/li>\n\n\n\n
      • addWorker(task, false)<\/code> \u2794 false<\/code> \u8868\u793a\u7528\u6700\u5927\u7ebf\u7a0b\u6c60\u91cc\u7684\u7a7a\u4f4d<\/li>\n\n\n\n
      • ctl<\/code> \u662f\u4e2a\u63a7\u5236\u5668\uff0c\u8bb0\u5f55\u7ebf\u7a0b\u6c60\u72b6\u6001 + \u7ebf\u7a0b\u6570\u91cf<\/li>\n\n\n\n
      • isRunning()<\/code> \u5224\u65ad\u7ebf\u7a0b\u6c60\u662f\u5426\u8fd8\u5728\u6b63\u5e38\u8fd0\u884c<\/li>\n<\/ul>\n\n\n\n
        \uff08\u9047\u5230\u8ffd\u95ee\uff0c\u7a0d\u5fae\u63d0\u4e00\u70b9\u5c31\u591f\u4e86\uff0c\u4e0d\u9700\u8981\u6df1\u5165\u5230\u4f4d\u8fd0\u7b97\u3001AQS \u8fd9\u79cd\u5e95\u5c42\u7ec6\u8282\uff0c\u9664\u975e\u662f\u8d44\u6df1\u5c97\u4f4d\uff09<\/p>\n\n\n\n
        \n\n\n\n
        \u603b\u7ed3\u4e00\u7248\u4e07\u80fd\u8bf4\u6cd5\uff08\u9762\u8bd5\u6536\u5c3e\uff09<\/h1>\n\n\n\n
        \n
        ThreadPoolExecutor \u7684 execute \u65b9\u6cd5\u91c7\u7528\u4e86\u5148\u7528\u6838\u5fc3\u7ebf\u7a0b\u3001\u518d\u653e\u961f\u5217\u3001\u518d\u6269\u5c55\u6700\u5927\u7ebf\u7a0b\u3001\u6700\u540e\u62d2\u7edd<\/strong>\u7684\u7b56\u7565\uff0c\u517c\u987e\u4e86\u6027\u80fd\u3001\u8d44\u6e90\u5229\u7528\u7387\u548c\u7cfb\u7edf\u7a33\u5b9a\u6027\uff0c\u662f\u5de5\u4e1a\u754c\u6700\u7ecf\u5178\u7684\u7ebf\u7a0b\u6c60\u8bbe\u8ba1\u4e4b\u4e00\u3002<\/p>\n<\/blockquote>\n\n\n\n
        \n\n\n\n
        \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u6211\u8fd9\u5c31\u7ed9\u4f60\u6253\u5305\u4e00\u7248\u8d85\u6e05\u6670\u53c8\u80fd\u80cc\u7684\u300aThreadPoolExecutor \u6838\u5fc3\u6e90\u7801\u903b\u8f91\u8bb2\u89e3\u300b\uff0c\u7b80\u5355\u76f4\u63a5\uff0c\u9762\u8bd5\u4e00\u8bb2 […]<\/p>\n","protected":false},"author":1,"featured_media":3655,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-3654","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3654","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3654"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3654\/revisions"}],"predecessor-version":[{"id":3656,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3654\/revisions\/3656"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3655"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3654"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3654"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3654"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}