java如何在ThreadPoolExecutor中运行的特定线程中暂停工作

Question

在我的应用程序中，我通过ThreadPoolExecutor在Threads中启动多个媒体下载。现在我希望能够暂停特定的下载线程。我怎么能做到

Answer 1

我不确定你是如何实现你的代码的，所以我只是在这里猜测

一种方法是跟踪你的线索

例如，创建地图：

Map<String,Thread> threads=new HashMap<String,Thread>();// ensure each Thread has a unique id, in this case its supposedly a String. then you can control them from outside your thread pool.

以下是一个被黑客攻击的实现：

public class hello{

public static void main(String...strings )throws Exception{

     ExecutorService executor = Executors.newFixedThreadPool(5);
     Map<String,Thread> threads=new HashMap<String, Thread>();
     for(int i=0;i<5;i++){
         Thread t = new myRunnable((i+1) +" ");
         threads.put((i+1)+"", t);
         executor.execute(t);
     }

     Thread.sleep(2000);
    ((myRunnable)threads.get("1")).isSuspened=true;
}

private static class myRunnable extends Thread{
    String a;
    public  boolean isSuspened=false;

    public myRunnable(String a) {
        this.a=a;
        // TODO Auto-generated constructor stub
    }
    @Override
    public void run(){
        while(true){
            if(isSuspened){
                continue;
            }
            try{
                System.out.println(a);
                Thread.sleep(2000);
            }catch(Exception e){}
        }
    }
}
}