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();
}
}
}
