SpringBoot--Timer（Async）01

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableAsync;

@SpringBootApplication
@EnableAsync
public class Application {

public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}

}

import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.AsyncResult;
import org.springframework.stereotype.Component;

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

/**
 * @author
 */
@Component
public class Task {

    public static Random random =new Random();

    @Async
    public 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<>("任务一完成");
    }


    @Async
    public 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<>("任务二完成");
    }


    @Async
    public 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<>("任务三完成");
    }

}

import com.didispace.async.Task;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.SpringApplicationConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.concurrent.Future;

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = Application.class)

public class ApplicationTests {

@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");

}

}