{"id":10775,"date":"2023-11-28T21:43:26","date_gmt":"2023-11-28T13:43:26","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10775"},"modified":"2023-11-28T21:43:31","modified_gmt":"2023-11-28T13:43:31","slug":"java-zhong-shen-me-shiexecutors-kuang-jia-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/java-zhong-shen-me-shiexecutors-kuang-jia-2\/","title":{"rendered":"Java\u4e2d\u4ec0\u4e48\u662fExecutors\u6846\u67b6\uff1f"},"content":{"rendered":"<p>\u4ec0\u4e48\u662fExecutor\u6846\u67b6\uff1f<br \/>\n\u6211\u4eec\u77e5\u9053\u7ebf\u7a0b\u6c60\u5c31\u662f\u7ebf\u7a0b\u7684\u96c6\u5408\uff0c\u7ebf\u7a0b\u6c60\u96c6\u4e2d\u7ba1\u7406\u7ebf\u7a0b\uff0c\u4ee5\u5b9e\u73b0\u7ebf\u7a0b\u7684\u91cd\u7528\uff0c\u964d\u4f4e\u8d44\u6e90\u6d88\u8017\uff0c \u63d0\u9ad8\u54cd\u5e94\u901f\u5ea6\u7b49\u3002\u7ebf\u7a0b\u7528\u4e8e\u6267\u884c\u5f02\u6b65\u4efb\u52a1\uff0c\u5355\u4e2a\u7684\u7ebf\u7a0b\u65e2\u662f\u5de5\u4f5c\u5355\u5143\u4e5f\u662f\u6267\u884c\u673a\u5236\uff0c\u4eceJDK1.5 \u5f00\u59cb\uff0c\u4e3a\u4e86\u628a\u5de5\u4f5c\u5355\u5143\u4e0e\u6267\u884c\u673a\u5236\u5206\u79bb\u5f00\uff0cExecutor\u6846\u67b6\u8bde\u751f\u4e86\uff0c\u4ed6\u662f\u4e00\u4e2a\u7528\u4e8e\u7edf\u4e00\u521b\u5efa\u4e0e \u8fd0\u884c\u7684\u63a5\u53e3\u3002Executor\u6846\u67b6\u5b9e\u73b0\u7684\u5c31\u662f\u7ebf\u7a0b\u6c60\u7684\u529f\u80fd\u3002<br \/>\nExecutor\u6846\u67b6\u5305\u62ec3\u5927\u90e8\u5206\uff1a<br \/>\n1\u3001\t\u4efb\u52a1\u3002\u4e5f\u5c31\u662f\u5de5\u4f5c\u5355\u5143\uff0c\u5305\u62ec\u88ab\u6267\u884c\u4efb\u52a1\u9700\u8981\u5b9e\u73b0\u7684\u63a5\u53e3\uff1a Runnable\u63a5\u53e3\u6216\u8005Callable \u63a5\u53e3;<br \/>\n2\u3001\t\u4efb\u52a1\u7684\u6267\u884c\u3002\u4e5f\u5c31\u662f\u628a\u4efb\u52a1\u5206\u6d3e\u7ed9\u591a\u4e2a\u7ebf\u7a0b\u7684\u6267\u884c\u673a\u5236\uff0c\u5305\u62ecExecutor\u63a5\u53e3\u53ca\u7ee7\u627f\u81ea Executor \u63a5\u53e3\u7684 ExecutorService \u63a5\u53e3\u3002<br \/>\n3\u3001\t\u5f02\u6b65\u8ba1\u7b97\u7684\u7ed3\u679c\u3002\u5305\u62ecFuture\u63a5\u53e3\u53ca\u5b9e\u73b0\u4e86 Future\u63a5\u53e3\u7684FutureTask\u7c7b\u3002<br \/>\nexecutor\u63d0\u4f9b\u4e86\u5de5\u5382\u7684\u65b9\u6cd5\u6765\u521b\u5efa\u7ebf\u7a0b\u6c60\uff0c\u8fd4\u56de\u7684\u7ebf\u7a0b\u6c60\u90fd\u5b9e\u73b0\u4e86 ExecutorService\u63a5\u53e3\u3002<br \/>\npublic static <strong>ExecutorService newFixedThreadPool<\/strong>(int n)<br \/>\n1\u3001\t\u521b\u5efa\u56fa\u5b9a\u6570\u76ee\u7684\u7ebf\u7a0b\u7684\u7ebf\u7a0b\u6c60\u3002<br \/>\n2\u3001\tnewFixedThreadPool\u4e8ecacheThreadPool\u5dee\u4e0d\u591a\u3002\u4e5f\u662f\u80fdreuse\u5c31\u7528\uff0c\u4f46\u662f\u4e0d\u80fd\u968f\u65f6\u521b \u5efa\u65b0\u7684\u7ebf\u7a0b;<br \/>\n3\u3001\t\u4efb\u610f\u65f6\u95f4\u70b9\uff0c\u53ea\u80fd\u591f\u6700\u591a\u6709\u56fa\u5b9a\u7684\u6570\u76ee\u7684\u7ebf\u7a0b\u5b58\u5728\uff0c\u6b64\u65f6\u5982\u679c\u6709\u65b0\u7684\u7ebf\u7a0b\u7684\u521b\u5efa\uff0c\u53ea\u80fd\u653e \u5728\u7b49\u5f85\u961f\u5217\u4e2d\uff0c\u53ea\u6709\u5f53\u7ebf\u7a0b\u6c60\u4e2d\u7684\u4e00\u4e9b\u7ebf\u7a0b\u7ec8\u6b62\u88ab\u6254\u51fa\u7ebf\u7a0b\u6c60\u540e\uff0c\u624d\u8fdb\u5165\u7ebf\u7a0b\u6c60\u8fdb\u884c\u8fd0\u884c\u3002<br \/>\n4\u3001\t\u548c cacheThreadPool \u4e0d\u540c\uff0cFixedThreadPool \u6ca1\u6709 IDLE \u673a\u5236\uff0c\u6240\u4ee5 FixedThreadPool \u591a \u6570\u9488\u5bf9\u4e8e\u5f88\u7a33\u5b9a\u7684\u7ebf\u7a0b\u5f00\u53d1\uff0c\u591a\u7528\u4e8e\u670d\u52a1\u5668\u3002<br \/>\n5\u3001\tfixedThreadPool\u548ccacheThreadPool \u2014\u6837\uff0c\u540c\u7528\u4e00\u4e2a\u5e95\u5c42\u6c60\uff0c\u53ea\u4e0d\u8fc7\u53c2\u6570\u4e0d\u540c\uff0cfix\u7ebf<br \/>\n\u7a0b\u56fa\u5b9a\uff0c\u5e76\u4e14\u662f OsIDLE \u65e0 IDLE; cache \u7ebf\u7a0b\u652f\u6301 O-Integer.MAX_VALUE, 60s \u7684 IDLE\u3002<br \/>\npublic static ExecutorService newCacheThreadPool()<br \/>\n1\u3001\t\u521b\u5efa\u4e00\u4e2a\u53ef\u7f13\u5b58\u6c60\uff0c\u8c03\u7528execute\u5c06\u91cd\u7528\u4ee5\u524d\u6784\u9020\u7684\u7ebf\u7a0b(\u5982\u679c\u80fd\u591f\u4f7f\u7528\u7684\u8bdd)\u3002\u5982\u679c\u6ca1\u6709<br \/>\n\u7ebf\u7a0b\u53ef\u7528\uff0c\u90a3\u4e48\u521b\u5efa\u4e00\u4e2a\u7ebf\u7a0b\u5230\u7ebf\u7a0b\u6c60\u4e2d\u3002\u7ec8\u6b62\u5e76\u79fb\u9664\u7ebf\u7a0b\u6c60\u4e2d\u8d85\u8fc760s\u6ca1\u6709\u88ab\u4f7f\u7528\u8fc7\u7684\u7ebf\u7a0b\u3002<br \/>\n2\u3001\t\u7f13\u5b58\u6c60\u4e00\u822c\u7528\u4e8e\u8fd0\u884c\u751f\u5b58\u671f\u5f88\u77ed\u7684\u5f02\u6b65\u7ebf\u7a0b\u4efb\u52a1\u3002<br \/>\n3\u3001\t\u653e\u5165cacheThreadPoo1\u4e2d\u7684\u7ebf\u7a0b\u4e0d\u7528\u62c5\u5fc3\u5176\u7ed3\u675f\uff0c\u8d85\u65f6\u540e\u4f1a\u88ab\u81ea\u52a8\u7ec8\u6b62\u3002<br \/>\n4\u3001\t\u7f3a\u7701\u503c timeout=60s<\/p>\n<p>public static ExecutorService newSingleThreadExecutor()<br \/>\n1\u3001\t\u521b\u5efa\u4e00\u4e2a\u5355\u7ebf\u7a0b\u5316\u7684Executor\u3002<br \/>\n2\u3001\t\u7528\u7684\u662f\u548ccache\u548cfixed\u6c60\u5b50\u76f8\u540c\u7684\u5e95\u5c42\u6c60\uff0c\u65e0IDLE\u3002<br \/>\npublic static ScheduleExecutorService newSchedu1eThreadPoo1(int corePoolSize)<br \/>\n\u521b\u5efa\u4e00\u4e2a\u652f\u6301\u5b9a\u65f6\u53ca\u5468\u671f\u6027\u7684\u4efb\u52a1\u6267\u884c\u7684\u7ebf\u7a0b\u6c60\uff0c\u591a\u6570\u60c5\u51b5\u53ef\u4ee5\u4ee3\u66ffTimer\u7c7b\u3002Timer\u5b58\u5728\u4ee5\u4e0b\u7f3a\u9677<br \/>\n1\u3001\tTimer\u7c7b\u4e0d\u7ba1\u542f\u52a8\u591a\u5c11\u5b9a\u65f6\u5668\uff0c\u4f46\u5b83\u53ea\u4f1a\u542f\u52a8\u4e00\u6761\u7ebf\u7a0b\uff0c\u5f53\u6709\u591a\u4e2a\u5b9a\u65f6\u4efb\u52a1\u65f6\uff0c\u5c31\u4f1a\u4ea7\u751f \u5ef6\u8fdf\u3002\u5982\uff1a\u6211\u4eec\u8981\u6c42\u4e00\u4e2a\u4efb\u52a1\u6bcf\u96943S\u6267\u884c\uff0c\u4e14\u6267\u884c\u5927\u7ea6\u9700\u898110S,\u7b2c\u4e8c\u4e2a\u4efb\u52a1\u6bcf\u96945S\u6267\u884c\uff0c \u4e24\u4e2a\u4efb\u52a1\u540c\u65f6\u542f\u52a8\u3002\u82e5\u4f7f\u7528Timer\u6211\u4eec\u4f1a\u53d1\u73b0\uff0c\u7b2c\u800c\u4e2a\u4efb\u52a1\u662f\u5728\u7b2c\u4e00\u4e2a\u4efb\u52a1\u6267\u884c\u7ed3\u675f\u540e\u76845S \u624d\u5f00\u59cb\u6267\u884c\u3002\u8fd9\u5c31\u662f\u591a\u4efb\u52a1\u7684\u5ef6\u65f6\u95ee\u9898\u3002<br \/>\n2\u3001\t\u82e5\u591a\u4e2a\u5b9a\u65f6\u4efb\u52a1\u4e2d\u6709\u4e00\u4e2a\u4efb\u52a1\u629b\u5f02\u5e38\uff0c\u90a3\u6240\u6709\u4efb\u52a1\u90fd\u65e0\u6cd5\u6267\u884c\u3002<br \/>\n3\u3001\tTimer\u6267\u884c\u5468\u671f\u4efb\u52a1\u65f6\u4f9d\u8d56\u7cfb\u7edf\u65f6\u95f4\u3002\u82e5\u7cfb\u7edf\u65f6\u95f4\u53d1\u751f\u53d8\u5316\uff0c\u90a3Timer\u6267\u884c\u7ed3\u679c\u53ef\u80fd\u4e5f\u4f1a \u53d1\u751f\u53d8\u5316\u3002\u800cScheduledExecutorService\u57fa\u4e8e\u65f6\u95f4\u7684\u5ef6\u8fdf\uff0c\u5e76\u975e\u65f6\u95f4\uff0c\u56e0\u6b64\u4e0d\u4f1a\u7531\u4e8e\u7cfb\u7edf\u65f6 \u95f4\u7684\u6539\u53d8\u53d1\u751f\u6267\u884c\u53d8\u5316\u3002\u7efc\u4e0a\u6240\u8ff0\uff0c\u5b9a\u65f6\u4efb\u52a1\u8981\u4f7f\u7528ScheduledExecutorService\u53d6\u4ee3Timer\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662fExecutor\u6846\u67b6\uff1f \u6211\u4eec\u77e5\u9053\u7ebf\u7a0b\u6c60\u5c31\u662f\u7ebf\u7a0b\u7684\u96c6\u5408\uff0c\u7ebf\u7a0b\u6c60\u96c6\u4e2d\u7ba1\u7406\u7ebf\u7a0b\uff0c\u4ee5\u5b9e\u73b0\u7ebf\u7a0b\u7684\u91cd\u7528\uff0c\u964d\u4f4e\u8d44\u6e90\u6d88\u8017 [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[118],"tags":[],"class_list":["post-10775","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10775","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10775"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10775\/revisions"}],"predecessor-version":[{"id":10777,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10775\/revisions\/10777"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10775"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10775"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10775"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}