{"id":203155,"date":"2025-05-22T08:53:52","date_gmt":"2025-05-22T00:53:52","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203155\/"},"modified":"2025-05-22T08:53:52","modified_gmt":"2025-05-22T00:53:52","slug":"%e4%bd%bf%e7%94%a8-countdownlatch-%e5%ae%9e%e7%8e%b0%e5%a4%9a%e7%ba%bf%e7%a8%8b%e5%90%8c%e6%ad%a5%ef%bc%8c%e5%a6%82%e4%bd%95%e4%bf%9d%e8%af%81%e8%be%93%e5%87%ba%e4%bf%a1%e6%81%af%e6%8c%89%e5%88%9b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203155\/","title":{"rendered":"\u4f7f\u7528 CountDownLatch \u5b9e\u73b0\u591a\u7ebf\u7a0b\u540c\u6b65\uff0c\u5982\u4f55\u4fdd\u8bc1\u8f93\u51fa\u4fe1\u606f\u6309\u521b\u5efa\u987a\u5e8f\u6392\u5217\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u4f7f\u7528 CountDownLatch \u5b9e\u73b0\u591a\u7ebf\u7a0b\u540c\u6b65\uff0c\u5982\u4f55\u4fdd\u8bc1\u8f93\u51fa\u4fe1\u606f\u6309\u521b\u5efa\u987a\u5e8f\u6392\u5217\uff1f<\/h1>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\u300a\u4f7f\u7528 CountDownLatch \u5b9e\u73b0\u591a\u7ebf\u7a0b\u540c\u6b65\uff0c\u5982\u4f55\u4fdd\u8bc1\u8f93\u51fa\u4fe1\u606f\u6309\u521b\u5efa\u987a\u5e8f\u6392\u5217\uff1f\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

<\/p>\n

\u5173\u4e8e countdownlatch \u4ee3\u7801\u6bb5\u7684\u7591\u60d1<\/strong><\/p>\n

\u4ee3\u7801\u4e2d\u4f7f\u7528\u4e86 countdownlatch \u5b9e\u73b0\u591a\u7ebf\u7a0b\u4efb\u52a1\u7684\u540c\u6b65\u3002\u4f46\u662f\uff0c\u5728 test \u65b9\u6cd5\u4e2d\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6267\u884c\u4e86 thread.sleep(1000)\uff0c\u5373\u5ef6\u8fdf 1 \u79d2\u540e\u624d\u8f93\u51fa\u4fe1\u606f\u3002<\/p>\n

\u95ee\u9898\uff1a<\/strong><\/p>\n

\u8fd9\u6bb5\u4ee3\u7801\u7684\u76ee\u7684\u4f3c\u4e4e\u662f\u7b49\u5f85\u6240\u6709\u7ebf\u7a0b\u6267\u884c\u5b8c test \u65b9\u6cd5\u540e\u518d\u7ee7\u7eed\u6267\u884c\u3002\u4f46\u7531\u4e8e\u7ebf\u7a0b\u7684\u5ef6\u8fdf\uff0c\u8f93\u51fa\u7ed3\u679c\u53ef\u80fd\u4e0d\u4f1a\u6309\u7167\u521b\u5efa\u987a\u5e8f\u6392\u5217\u3002\u5982\u4f55\u786e\u4fdd\u8f93\u51fa\u6309\u521b\u5efa\u987a\u5e8f\u6392\u5217\uff1f<\/p>\n

\u7b54\u6848\uff1a<\/strong><\/p>\n

\u7ed9\u51fa\u7684\u4ee3\u7801\u6bb5\u4f7f\u7528\u4e86\u7ebf\u7a0b\u6c60\uff0c\u8fd9\u610f\u5473\u7740\u6240\u6709 10 \u4e2a\u7ebf\u7a0b\u51e0\u4e4e\u540c\u65f6\u6267\u884c\uff0c\u5bfc\u81f4\u8f93\u51fa\u4fe1\u606f\u4e71\u5e8f\u3002<\/p>\n

\u60f3\u8981\u6309\u7167\u521b\u5efa\u987a\u5e8f\u8f93\u51fa\u4fe1\u606f\uff0c\u9700\u8981\u5728\u4e00\u4e2a\u7ebf\u7a0b\u5185\u6309\u987a\u5e8f\u6267\u884c\u6240\u6709\u4efb\u52a1\u3002\u53ef\u4ee5\u4f7f\u7528\u5faa\u73af\u6216\u5176\u4ed6\u540c\u6b65\u673a\u5236\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/p>\n

\u4f8b\u5982\uff0c\u53ef\u4ee5\u5728 main \u65b9\u6cd5\u4e2d\u521b\u5efa\u4e00\u4e2a\u5faa\u73af\uff0c\u4f9d\u6b21\u521b\u5efa\u548c\u7b49\u5f85\u6bcf\u4e2a\u7ebf\u7a0b\uff1a<\/p>\n

CountDownLatch countDownLatch = new CountDownLatch(threadCount);\n\nfor (int i = 0; i < threadCount; i++) {\n    final int count = i;\n    new Thread(() -> {\n        try {\n            test(count);\n        } catch (Exception e) {\n            log.error(\"Exception,{}\", e);\n        } finally {\n            countDownLatch.countDown();\n        }\n    }).start();\n}\n\ncountDownLatch.await(1, TimeUnit.MILLISECONDS);<\/pre>\n
\u901a\u8fc7\u5728\u5faa\u73af\u4e2d\u521b\u5efa\u548c\u7b49\u5f85\u6bcf\u4e2a\u7ebf\u7a0b\uff0c\u53ef\u4ee5\u786e\u4fdd\u6309\u521b\u5efa\u987a\u5e8f\u6267\u884c\u4efb\u52a1\uff0c\u4ece\u800c\u4fdd\u8bc1\u8f93\u51fa\u7684\u987a\u5e8f\u6027\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u4f7f\u7528 CountDownLatch \u5b9e\u73b0\u591a\u7ebf\u7a0b\u540c\u6b65\uff0c\u5982\u4f55\u4fdd\u8bc1\u8f93\u51fa\u4fe1\u606f\u6309\u521b\u5efa\u987a\u5e8f\u6392\u5217\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4f7f\u7528 CountDownLatc...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203155","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203155"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203155\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203155"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203155"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}