Java使用ThreadFactory来创建新的线程

首先来构建线程封装类WorkThread,该类的功能主要是为了能够更好的管理线程而创建的

public class WorkThread extends Thread {	 
	    private Runnable target;   //线程执行目标
	    private AtomicInteger counter;  
	 
	    public WorkThread(Runnable target, AtomicInteger counter) {  
	        this.target = target;  
	        this.counter = counter;  
	    }  
	    @Override 
	    public void run() {  
	        try {  
	            target.run();  
	        } finally {  
	            int c = counter.getAndDecrement();  
	            System.out.println("terminate no " + c + " Threads");  
	        }  
	    }  
}

其次，来定义一个测试目标

public class WorkRunnable implements Runnable
{
	@Override
	public void run() {
		 System.out.println("complete a task");
	}

}

实现线程工厂的方法

public class WorkThreadFactory implements ThreadFactory{
	
	private AtomicInteger atomicInteger = new AtomicInteger(0);
	
	@Override
	public Thread newThread(Runnable r)
	{
		int c = atomicInteger.incrementAndGet();  
                System.out.println("create no " + c + " Threads");  
		return new WorkThread(r, atomicInteger);//通过计数器，可以更好的管理线程
	}

}

测试线程工厂

public class TestThreadFactory {

	public static void main(String[] args) {
		//创建线程（并发）池，自动伸缩(自动条件线程池大小)
		ExecutorService es =  Executors.newCachedThreadPool(new WorkThreadFactory());

		//同时并发5个工作线程
		es.execute(new WorkRunnable());
		es.execute(new WorkRunnable());
		es.execute(new WorkRunnable());
		es.execute(new WorkRunnable());
		es.execute(new WorkRunnable());
		//指示当所有线程执行完毕后关闭线程池和工作线程，如果不调用此方法，jvm不会自动关闭
	       es.shutdown();  
	    
	    try {  
	         //等待线程执行完毕，不能超过2*60秒，配合shutDown
	          es.awaitTermination(2*60, TimeUnit.SECONDS);  
	     } catch (InterruptedException e) {  
	            e.printStackTrace();  
	     }  
	}
	
}