JAVA线程池ThreadPoolExecutor的分析和使用(新手踩坑和推荐方案)

一、Java中的ThreadPoolExecutor类

java.uitl.concurrent.ThreadPoolExecutor类是线程池中最核心的一个类，因此如果要透彻地了解Java中的线程池，必须先了解这个类。下面我们来看一下ThreadPoolExecutor类的具体实现源码。
在ThreadPoolExecutor类中提供了四个构造方法：

 1 public class ThreadPoolExecutor extends AbstractExecutorService {
 2     .....
 3     public ThreadPoolExecutor(int corePoolSize,int maximumPoolSize,long keepAliveTime,TimeUnit unit,
 4             BlockingQueue<Runnable> workQueue);
 5  
 6     public ThreadPoolExecutor(int corePoolSize,int maximumPoolSize,long keepAliveTime,TimeUnit unit,
 7             BlockingQueue<Runnable> workQueue,ThreadFactory threadFactory);
 8  
 9     public ThreadPoolExecutor(int corePoolSize,int maximumPoolSize,long keepAliveTime,TimeUnit unit,
10             BlockingQueue<Runnable> workQueue,RejectedExecutionHandler handler);
11  
12     public ThreadPoolExecutor(int corePoolSize,int maximumPoolSize,long keepAliveTime,TimeUnit unit,
13         BlockingQueue<Runnable> workQueue,ThreadFactory threadFactory,RejectedExecutionHandler handler);
14     ...
15 }

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