Java 如何使线程超时

实际上，用ExecutorService而不是Timer，这里有一个SSCCE:

package com.stackoverflow.q2275443;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class Test {
    public static void main(String[] args) throws Exception {
        ExecutorService executor = Executors.newSingleThreadExecutor();
        Future<String> future = executor.submit(new Task());

        try {
            System.out.println("Started..");
            System.out.println(future.get(3, TimeUnit.SECONDS));
            System.out.println("Finished!");
        } catch (TimeoutException e) {
            future.cancel(true);
            System.out.println("Terminated!");
        }

        executor.shutdownNow();
    }
}

class Task implements Callable<String> {
    @Override
    public String call() throws Exception {
        Thread.sleep(4000); // Just to demo a long running task of 4 seconds.
        return "Ready!";
    }
}

在Future#get()方法中稍微使用timeout参数，例如将其增加到5，您将看到线程结束.你可以在catch (TimeoutException e)挡路中截取超时.

Update:为了澄清概念上的误解，sleep()是not.它仅用于SSCCE/演示目的.只需要做your个长时间运行的任务，而不是sleep()个.在长时间运行的任务中，您应该判 break line 程是否不是interrupted，如下所示:

while (!Thread.interrupted()) {
    // Do your long running task here.
}