Java为一段代码设置超时时间

package cn.zq.test;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class OverTime {
    public static void main(String[] args) throws InterruptedException, ExecutionException {

        ThreadPoolExecutor exec = new ThreadPoolExecutor(1, 1, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>());

        Callable<String> doJob = new Callable<String>() {
            @Override
            public String call() throws Exception {
                //开始执⾏耗时操作
                Thread.sleep(1000 * 1);
                return "线程执⾏完成.";
            }
        };

        try {
            Future<String> future = exec.submit(doJob);
            String obj = future.get(1000 * 2, TimeUnit.MILLISECONDS); //任务处理超时时间设为 1 秒
            System.out.println("任务成功返回:" + obj);
        } catch (TimeoutException ex) {
            System.out.println("处理超时啦....");
            ex.printStackTrace();
        } catch (Exception e) {
            System.out.println("处理失败.");
            e.printStackTrace();
        }
        // 关闭线程池
        exec.shutdown();
    }
}