线程池单例类

package com.study.googleplay.manager;import java.util.concurrent.Executors;import java.util.concurrent.LinkedBlockingDeque;import java.util.concurrent.ThreadPoolExecutor;import java.util.concurrent.ThreadPoolExecutor.AbortPolicy;import java.util.concurrent.TimeUnit;public class ThreadManager {/** * 线程池 *  * @author TCL * @date 2016-6-13 */private static ThreadPool threadPoolpool;public static ThreadPool getInstance() {if (threadPoolpool == null) {synchronized (ThreadManager.class) {if (threadPoolpool == null) {int threadCount = Runtime.getRuntime().availableProcessors() * 2 + 1;// 线程个数threadPoolpool = new ThreadPool(threadCount, threadCount,1L);}}}return threadPoolpool;}public static class ThreadPool {private int corePoolSize;// 核心线程数private int maximumPoolSize;// 最大线程数private long keepAliveTime;// 休息时间private ThreadPoolExecutor executor;private ThreadPool(int corePoolSize, int maximumPoolSize,long keepAliveTime) {this.corePoolSize = corePoolSize;this.maximumPoolSize = maximumPoolSize;this.keepAliveTime = keepAliveTime;}public void execute(Runnable r) {// 参数1：核心线程数，参数2：最大线程数，参数3：休息时间，参数4：时间单位，// 参数5：线程队列参数6：生产线程的工厂，参数7：线程异常策略if (executor == null) {executor = new ThreadPoolExecutor(corePoolSize,maximumPoolSize, keepAliveTime, TimeUnit.SECONDS,new LinkedBlockingDeque<Runnable>(),Executors.defaultThreadFactory(), new AbortPolicy());}executor.execute(r);// 执行一个Runnable对象，具体执行时机由线程池说了算}// 取消任务public void cancel(Runnable r) {if (r != null) {// 如果任务还没开始，正在等待，可以通过 此方法移除，// 如果任务已经开始，需要在run方法中进行中断executor.getQueue().remove(r);// 从线程池中移除对象}}}}