AsyncTest.java

package com.my.blog.website;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.AsyncResult;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.stereotype.Component;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.Random;
import java.util.concurrent.Future;

/**
 * 测试异步调用
 * Created by Administrator on 2017/3/6 006.
 */
@RunWith(SpringRunner.class)
@SpringBootTest
@EnableAsync
public class AsyncTest {

    @Autowired
    private Task task;

    @Test
    public void Test() throws Exception {

        long start = System.currentTimeMillis();
        Future<String> task1 = task.doTaskOne();
        Future<String> task2 = task.doTaskTwo();
        Future<String> task3 = task.doTaskThree();
        while(true) {

            if(task1.isDone() && task2.isDone() && task3.isDone()) {
                // 三个任务都调用完成，退出循环等待
                break;
            }
            Thread.sleep(1000);
        }
        long end = System.currentTimeMillis();
        System.out.println("任务全部完成，总耗时：" + (end - start) + "毫秒");
    }



}

@Component
class Task{

    private static Random random =new Random();

    @Async
     Future<String> doTaskOne() throws Exception {
        System.out.println("开始做任务一");
        long start = System.currentTimeMillis();
        Thread.sleep(random.nextInt(10000));
        long end = System.currentTimeMillis();
        System.out.println("完成任务一，耗时：" + (end - start) + "毫秒");
        return new AsyncResult<>("任务一OK");
    }

    @Async
    Future<String> doTaskTwo() throws Exception {
        System.out.println("开始做任务二");
        long start = System.currentTimeMillis();
        Thread.sleep(random.nextInt(10000));
        long end = System.currentTimeMillis();
        System.out.println("完成任务二，耗时：" + (end - start) + "毫秒");
        return new AsyncResult<>("任务二OK");
    }

    @Async
    Future<String> doTaskThree() throws Exception {
        System.out.println("开始做任务三");
        long start = System.currentTimeMillis();
        Thread.sleep(random.nextInt(10000));
        long end = System.currentTimeMillis();
        System.out.println("完成任务三，耗时：" + (end - start) + "毫秒");
        return new AsyncResult<>("任务三OK");
    }
}