Java\u7ebf\u7a0b\u6c60\u7ba1\u7406\u7740\u4e00\u7ec4\u5de5\u4f5c\u7ebf\u7a0b\u3002\u5b83\u5305\u542b\u4e00\u4e2a\u961f\u5217\uff0c\u7528\u4e8e\u5b58\u653e\u7b49\u5f85\u6267\u884c\u7684\u4efb\u52a1\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528ThreadPoolExecutor\u5728Java\u4e2d\u521b\u5efa\u7ebf\u7a0b\u6c60\u3002Java\u7ebf\u7a0b\u6c60\u7ba1\u7406\u7740\u4e00\u7ec4\u53ef\u8fd0\u884c\u7ebf\u7a0b\u3002\u5de5\u4f5c\u7ebf\u7a0b\u4ece\u961f\u5217\u4e2d\u6267\u884c\u53ef\u8fd0\u884c\u7ebf\u7a0b\u3002java.util.concurrent.Executors\u63d0\u4f9b\u4e86\u5de5\u5382\u548c\u652f\u6301\u65b9\u6cd5\uff0c\u7528\u4e8e\u521b\u5efaJava\u4e2d\u7684\u7ebf\u7a0b\u6c60\u3002Executors\u662f\u4e00\u4e2a\u5b9e\u7528\u7c7b\uff0c\u8fd8\u901a\u8fc7\u5404\u79cd\u5de5\u5382\u65b9\u6cd5\u63d0\u4f9b\u4e86\u4e0eExecutorService\u3001ScheduledExecutorService\u3001ThreadFactory\u548cCallable\u7c7b\u4e00\u8d77\u4f7f\u7528\u7684\u6709\u7528\u65b9\u6cd5\u3002\u8ba9\u6211\u4eec\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f\u6765\u89e3\u91ca\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u3002\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u4e00\u4e2aRunnable\u7c7b\uff0c\u547d\u540d\u4e3aWorkerThread.java\u3002<\/p>\n
package com.Olivia.threadpool;\r\n\r\npublic class WorkerThread implements Runnable {\r\n \r\n private String command;\r\n \r\n public WorkerThread(String s){\r\n this.command=s;\r\n }\r\n\r\n @Override\r\n public void run() {\r\n System.out.println(Thread.currentThread().getName()+\" Start. Command = \"+command);\r\n processCommand();\r\n System.out.println(Thread.currentThread().getName()+\" End.\");\r\n }\r\n\r\n private void processCommand() {\r\n try {\r\n Thread.sleep(5000);\r\n } catch (InterruptedException e) {\r\n e.printStackTrace();\r\n }\r\n }\r\n\r\n @Override\r\n public String toString(){\r\n return this.command;\r\n }\r\n}\r\n<\/code><\/pre>\nExecutorService \u793a\u4f8b\u7684\u6f14\u793a<\/h2>\n
Translated: “\u793a\u4f8b ExecutorService”<\/p>\n
\u8fd9\u91cc\u662f\u6d4b\u8bd5\u7a0b\u5e8f\u7c7bSimpleThreadPool.java\uff0c\u6211\u4eec\u5728Executors\u6846\u67b6\u4e2d\u521b\u5efa\u4e86\u4e00\u4e2a\u56fa\u5b9a\u7684\u7ebf\u7a0b\u6c60\u3002<\/p>\n
package com.Olivia.threadpool;\r\n\r\nimport java.util.concurrent.ExecutorService;\r\nimport java.util.concurrent.Executors;\r\n\r\npublic class SimpleThreadPool {\r\n\r\n public static void main(String[] args) {\r\n ExecutorService executor = Executors.newFixedThreadPool(5);\r\n for (int i = 0; i < 10; i++) {\r\n Runnable worker = new WorkerThread(\"\" + i);\r\n executor.execute(worker);\r\n }\r\n executor.shutdown();\r\n while (!executor.isTerminated()) {\r\n }\r\n System.out.println(\"Finished all threads\");\r\n }\r\n}\r\n<\/code><\/pre>\n\u5728\u4e0a\u8ff0\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u6b63\u5728\u521b\u5efa\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u4e3a5\u4e2a\u7684\u7ebf\u7a0b\u6c60\u3002\u7136\u540e\uff0c\u6211\u4eec\u5c0610\u4e2a\u4efb\u52a1\u63d0\u4ea4\u5230\u8be5\u7ebf\u7a0b\u6c60\u4e2d\uff0c\u7531\u4e8e\u7ebf\u7a0b\u6c60\u7684\u5927\u5c0f\u4e3a5\uff0c\u5b83\u5c06\u5f00\u59cb\u5904\u74065\u4e2a\u4efb\u52a1\uff0c\u5176\u4ed6\u4efb\u52a1\u5c06\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\u3002\u4e00\u65e6\u5176\u4e2d\u4e00\u4e2a\u4efb\u52a1\u5b8c\u6210\uff0c\u5de5\u4f5c\u7ebf\u7a0b\u5c06\u9009\u62e9\u7b49\u5f85\u961f\u5217\u4e2d\u7684\u53e6\u4e00\u4e2a\u4efb\u52a1\u5e76\u6267\u884c\u3002\u4ee5\u4e0b\u662f\u4e0a\u8ff0\u7a0b\u5e8f\u7684\u8f93\u51fa\u3002<\/p>\n
pool-1-thread-2 Start. Command = 1\r\npool-1-thread-4 Start. Command = 3\r\npool-1-thread-1 Start. Command = 0\r\npool-1-thread-3 Start. Command = 2\r\npool-1-thread-5 Start. Command = 4\r\npool-1-thread-4 End.\r\npool-1-thread-5 End.\r\npool-1-thread-1 End.\r\npool-1-thread-3 End.\r\npool-1-thread-3 Start. Command = 8\r\npool-1-thread-2 End.\r\npool-1-thread-2 Start. Command = 9\r\npool-1-thread-1 Start. Command = 7\r\npool-1-thread-5 Start. Command = 6\r\npool-1-thread-4 Start. Command = 5\r\npool-1-thread-2 End.\r\npool-1-thread-4 End.\r\npool-1-thread-3 End.\r\npool-1-thread-5 End.\r\npool-1-thread-1 End.\r\nFinished all threads\r\n<\/code><\/pre>\n\u8f93\u51fa\u786e\u8ba4\u6709\u4e94\u4e2a\u7ebf\u7a0b\u6c60\uff0c\u540d\u79f0\u4ece\u201cpool-1-thread-1\u201d\u5230\u201cpool-1-thread-5\u201d\uff0c\u5b83\u4eec\u8d1f\u8d23\u6267\u884c\u88ab\u63d0\u4ea4\u5230\u7ebf\u7a0b\u6c60\u7684\u4efb\u52a1\u3002<\/p>\n
\u7ebf\u7a0b\u6c60\u6267\u884c\u5668\u793a\u4f8b<\/h2>\n
Executors\u7c7b\u63d0\u4f9b\u4e86\u4f7f\u7528ThreadPoolExecutor\u5b9e\u73b0ExecutorService\u7684\u7b80\u5355\u5b9e\u73b0\uff0c\u4f46ThreadPoolExecutor\u63d0\u4f9b\u4e86\u6bd4\u6b64\u66f4\u591a\u7684\u529f\u80fd\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u521b\u5efaThreadPoolExecutor\u5b9e\u4f8b\u65f6\u6307\u5b9a\u6d3b\u52a8\u7ebf\u7a0b\u7684\u6570\u91cf\uff0c\u5e76\u4e14\u53ef\u4ee5\u9650\u5236\u7ebf\u7a0b\u6c60\u5927\u5c0f\u5e76\u521b\u5efa\u6211\u4eec\u81ea\u5df1\u7684RejectedExecutionHandler\u5b9e\u73b0\u6765\u5904\u7406\u65e0\u6cd5\u653e\u5165\u5de5\u4f5c\u961f\u5217\u7684\u4f5c\u4e1a\u3002\u4e0b\u9762\u662f\u6211\u4eec\u81ea\u5b9a\u4e49\u7684RejectedExecutionHandler\u63a5\u53e3\u5b9e\u73b0\u3002<\/p>\n
package com.Olivia.threadpool;\r\n\r\nimport java.util.concurrent.RejectedExecutionHandler;\r\nimport java.util.concurrent.ThreadPoolExecutor;\r\n\r\npublic class RejectedExecutionHandlerImpl implements RejectedExecutionHandler {\r\n\r\n @Override\r\n public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) {\r\n System.out.println(r.toString() + \" is rejected\");\r\n }\r\n\r\n}\r\n<\/code><\/pre>\n\u7ebf\u7a0b\u6c60\u63d0\u4f9b\u4e86\u4e00\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\u6765\u83b7\u53d6\u6267\u884c\u5668\u7684\u5f53\u524d\u72b6\u6001\u3001\u6c60\u5927\u5c0f\u3001\u6d3b\u52a8\u7ebf\u7a0b\u8ba1\u6570\u548c\u4efb\u52a1\u8ba1\u6570\u3002\u56e0\u6b64\uff0c\u6211\u6709\u4e00\u4e2a\u76d1\u89c6\u7ebf\u7a0b\uff0c\u4f1a\u5728\u7279\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\u5185\u6253\u5370\u6267\u884c\u5668\u7684\u4fe1\u606f\u3002<\/p>\n
package com.Olivia.threadpool;\r\n\r\nimport java.util.concurrent.ThreadPoolExecutor;\r\n\r\npublic class MyMonitorThread implements Runnable\r\n{\r\n private ThreadPoolExecutor executor;\r\n private int seconds;\r\n private boolean run=true;\r\n\r\n public MyMonitorThread(ThreadPoolExecutor executor, int delay)\r\n {\r\n this.executor = executor;\r\n this.seconds=delay;\r\n }\r\n public void shutdown(){\r\n this.run=false;\r\n }\r\n @Override\r\n public void run()\r\n {\r\n while(run){\r\n System.out.println(\r\n String.format(\"[monitor] [%d\/%d] Active: %d, Completed: %d, Task: %d, isShutdown: %s, isTerminated: %s\",\r\n this.executor.getPoolSize(),\r\n this.executor.getCorePoolSize(),\r\n this.executor.getActiveCount(),\r\n this.executor.getCompletedTaskCount(),\r\n this.executor.getTaskCount(),\r\n this.executor.isShutdown(),\r\n this.executor.isTerminated()));\r\n try {\r\n Thread.sleep(seconds*1000);\r\n } catch (InterruptedException e) {\r\n e.printStackTrace();\r\n }\r\n }\r\n \r\n }\r\n}\r\n<\/code><\/pre>\n\u4ee5\u4e0b\u662f\u4f7f\u7528ThreadPoolExecutor\u7684\u7ebf\u7a0b\u6c60\u5b9e\u73b0\u793a\u4f8b\u3002<\/p>\n
package com.Olivia.threadpool;\r\n\r\nimport java.util.concurrent.ArrayBlockingQueue;\r\nimport java.util.concurrent.Executors;\r\nimport java.util.concurrent.ThreadFactory;\r\nimport java.util.concurrent.ThreadPoolExecutor;\r\nimport java.util.concurrent.TimeUnit;\r\n\r\npublic class WorkerPool {\r\n\r\n public static void main(String args[]) throws InterruptedException{\r\n \/\/RejectedExecutionHandler implementation\r\n RejectedExecutionHandlerImpl rejectionHandler = new RejectedExecutionHandlerImpl();\r\n \/\/Get the ThreadFactory implementation to use\r\n ThreadFactory threadFactory = Executors.defaultThreadFactory();\r\n \/\/creating the ThreadPoolExecutor\r\n ThreadPoolExecutor executorPool = new ThreadPoolExecutor(2, 4, 10, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(2), threadFactory, rejectionHandler);\r\n \/\/start the monitoring thread\r\n MyMonitorThread monitor = new MyMonitorThread(executorPool, 3);\r\n Thread monitorThread = new Thread(monitor);\r\n monitorThread.start();\r\n \/\/submit work to the thread pool\r\n for(int i=0; i<10; i++){\r\n executorPool.execute(new WorkerThread(\"cmd\"+i));\r\n }\r\n \r\n Thread.sleep(30000);\r\n \/\/shut down the pool\r\n executorPool.shutdown();\r\n \/\/shut down the monitor thread\r\n Thread.sleep(5000);\r\n monitor.shutdown();\r\n \r\n }\r\n}\r\n<\/code><\/pre>\n\u8bf7\u6ce8\u610f\uff0c\u5728\u521d\u59cb\u5316ThreadPoolExecutor\u65f6\uff0c\u6211\u4eec\u5c06\u521d\u59cb\u6c60\u5927\u5c0f\u8bbe\u7f6e\u4e3a2\uff0c\u6700\u5927\u6c60\u5927\u5c0f\u8bbe\u7f6e\u4e3a4\uff0c\u5de5\u4f5c\u961f\u5217\u5927\u5c0f\u8bbe\u7f6e\u4e3a2\u3002\u56e0\u6b64\uff0c\u5982\u679c\u67094\u4e2a\u6b63\u5728\u8fd0\u884c\u7684\u4efb\u52a1\uff0c\u5e76\u4e14\u63d0\u4ea4\u4e86\u66f4\u591a\u4efb\u52a1\uff0c\u5de5\u4f5c\u961f\u5217\u5c06\u53ea\u5bb9\u7eb3\u5176\u4e2d\u76842\u4e2a\uff0c\u5176\u4f59\u4efb\u52a1\u5c06\u7531RejectedExecutionHandlerImpl\u5904\u7406\u3002\u4ee5\u4e0b\u662f\u4e0a\u8ff0\u7a0b\u5e8f\u7684\u8f93\u51fa\uff0c\u786e\u8ba4\u4e86\u4e0a\u8ff0\u9648\u8ff0\u3002<\/p>\n
pool-1-thread-1 Start. Command = cmd0\r\npool-1-thread-4 Start. Command = cmd5\r\ncmd6 is rejected\r\npool-1-thread-3 Start. Command = cmd4\r\npool-1-thread-2 Start. Command = cmd1\r\ncmd7 is rejected\r\ncmd8 is rejected\r\ncmd9 is rejected\r\n[monitor] [0\/2] Active: 4, Completed: 0, Task: 6, isShutdown: false, isTerminated: false\r\n[monitor] [4\/2] Active: 4, Completed: 0, Task: 6, isShutdown: false, isTerminated: false\r\npool-1-thread-4 End.\r\npool-1-thread-1 End.\r\npool-1-thread-2 End.\r\npool-1-thread-3 End.\r\npool-1-thread-1 Start. Command = cmd3\r\npool-1-thread-4 Start. Command = cmd2\r\n[monitor] [4\/2] Active: 2, Completed: 4, Task: 6, isShutdown: false, isTerminated: false\r\n[monitor] [4\/2] Active: 2, Completed: 4, Task: 6, isShutdown: false, isTerminated: false\r\npool-1-thread-1 End.\r\npool-1-thread-4 End.\r\n[monitor] [4\/2] Active: 0, Completed: 6, Task: 6, isShutdown: false, isTerminated: false\r\n[monitor] [2\/2] Active: 0, Completed: 6, Task: 6, isShutdown: false, isTerminated: false\r\n[monitor] [2\/2] Active: 0, Completed: 6, Task: 6, isShutdown: false, isTerminated: false\r\n[monitor] [2\/2] Active: 0, Completed: 6, Task: 6, isShutdown: false, isTerminated: false\r\n[monitor] [2\/2] Active: 0, Completed: 6, Task: 6, isShutdown: false, isTerminated: false\r\n[monitor] [2\/2] Active: 0, Completed: 6, Task: 6, isShutdown: false, isTerminated: false\r\n[monitor] [0\/2] Active: 0, Completed: 6, Task: 6, isShutdown: true, isTerminated: true\r\n[monitor] [0\/2] Active: 0, Completed: 6, Task: 6, isShutdown: true, isTerminated: true\r\n<\/code><\/pre>\n\u6ce8\u610f\u6267\u884c\u8005\u7684\u6d3b\u52a8\u3001\u5df2\u5b8c\u6210\u548c\u603b\u5df2\u5b8c\u6210\u4efb\u52a1\u6570\u91cf\u7684\u53d8\u5316\u3002\u6211\u4eec\u53ef\u4ee5\u8c03\u7528shutdown()\u65b9\u6cd5\u6765\u5b8c\u6210\u6240\u6709\u63d0\u4ea4\u7684\u4efb\u52a1\u5e76\u7ec8\u6b62\u7ebf\u7a0b\u6c60\u3002\u5982\u679c\u60a8\u60f3\u8981\u5ef6\u8fdf\u6216\u5b9a\u671f\u8fd0\u884c\u4efb\u52a1\uff0c\u53ef\u4ee5\u4f7f\u7528ScheduledThreadPoolExecutor\u7c7b\u3002\u5728Java Schedule Thread Pool Executor\u4e0a\u9605\u8bfb\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Java\u7ebf\u7a0b\u6c60\u7ba1\u7406\u7740\u4e00\u7ec4\u5de5\u4f5c\u7ebf\u7a0b\u3002\u5b83\u5305\u542b\u4e00\u4e2a\u961f\u5217\uff0c\u7528\u4e8e\u5b58\u653e\u7b49\u5f85\u6267\u884c\u7684\u4efb\u52a1\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528ThreadPoolEx […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2209,2252,2253,973,710],"class_list":{"0":"post-859","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-java","9":"tag-threadpoolexecutor","10":"tag-973","11":"tag-710"},"yoast_head":"\n
Java\u7ebf\u7a0b\u6c60\u6267\u884c\u5668\u5168\u9762\u89e3\u6790\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u7684\u5b9e\u6218\u6307\u5357\u4e0e\u793a\u4f8b - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u6df1\u5165\u89e3\u6790Java\u7ebf\u7a0b\u6c60\u6267\u884c\u5668(ThreadPoolExecutor)\u7684\u5de5\u4f5c\u539f\u7406\u4e0e\u4f7f\u7528\u65b9\u6cd5\u3002\u901a\u8fc7\u8be6\u7ec6\u793a\u4f8b\u4ee3\u7801\uff0c\u5b66\u4e60\u5982\u4f55\u6b63\u786e\u914d\u7f6e\u7ebf\u7a0b\u6c60\u53c2\u6570\uff0c\u4f18\u5316\u591a\u7ebf\u7a0b\u5e94\u7528\u6027\u80fd\uff0c\u907f\u514d\u5e38\u89c1\u9677\u9631\u3002\u638c\u63e1Java\u5e76\u53d1\u7f16\u7a0b\u6838\u5fc3\u6280\u80fd\uff0c\u63d0\u5347\u7cfb\u7edf\u541e\u5410\u91cf\u4e0e\u54cd\u5e94\u901f\u5ea6\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7ebf\u7a0b\u6c60\u6267\u884c\u5668-java-\u7ebf\u7a0b\u6c60\u793a\u4f8b\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u7ebf\u7a0b\u6c60\u6267\u884c\u5668\u5168\u9762\u89e3\u6790\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u7684\u5b9e\u6218\u6307\u5357\u4e0e\u793a\u4f8b\" \/>\n<meta property=\"og:description\" content=\"\u6df1\u5165\u89e3\u6790Java\u7ebf\u7a0b\u6c60\u6267\u884c\u5668(ThreadPoolExecutor)\u7684\u5de5\u4f5c\u539f\u7406\u4e0e\u4f7f\u7528\u65b9\u6cd5\u3002\u901a\u8fc7\u8be6\u7ec6\u793a\u4f8b\u4ee3\u7801\uff0c\u5b66\u4e60\u5982\u4f55\u6b63\u786e\u914d\u7f6e\u7ebf\u7a0b\u6c60\u53c2\u6570\uff0c\u4f18\u5316\u591a\u7ebf\u7a0b\u5e94\u7528\u6027\u80fd\uff0c\u907f\u514d\u5e38\u89c1\u9677\u9631\u3002\u638c\u63e1Java\u5e76\u53d1\u7f16\u7a0b\u6838\u5fc3\u6280\u80fd\uff0c\u63d0\u5347\u7cfb\u7edf\u541e\u5410\u91cf\u4e0e\u54cd\u5e94\u901f\u5ea6\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7ebf\u7a0b\u6c60\u6267\u884c\u5668-java-\u7ebf\u7a0b\u6c60\u793a\u4f8b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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