SpringBoot異步任務(wù)使用方法詳解

更新時間：2020年03月13日 12:29:17 作者：玉天恒

這篇文章主要介紹了SpringBoot異步任務(wù)使用方法詳解,文中通過示例代碼介紹的非常詳細(xì)，對大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價值,需要的朋友可以參考下

步驟，如圖所示：

1.添加異步任務(wù)業(yè)務(wù)類

package top.ytheng.demo.task;

import java.util.concurrent.Future;

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

//異步任務(wù)業(yè)務(wù)類
@Component
//標(biāo)記此類是異步類，也可在方法中標(biāo)記
//不加，則類里面的方法為同步執(zhí)行
@Async
public class AsyncTask {

  public void task1() throws InterruptedException {
    long begin = System.currentTimeMillis();
    Thread.sleep(1000);
    long end = System.currentTimeMillis();
    System.out.println("任務(wù)1耗時：" + (end - begin));
  }
  
  public void task2() throws InterruptedException {
    long begin = System.currentTimeMillis();
    Thread.sleep(2000);
    long end = System.currentTimeMillis();
    System.out.println("任務(wù)2耗時：" + (end - begin));
  }
  
  public void task3() throws InterruptedException {
    long begin = System.currentTimeMillis();
    Thread.sleep(3000);
    long end = System.currentTimeMillis();
    System.out.println("任務(wù)3耗時：" + (end - begin));
  }
  
  //測試拿到返回結(jié)果
  public Future<String> task4() throws InterruptedException {
    long begin = System.currentTimeMillis();
    Thread.sleep(1000);
    long end = System.currentTimeMillis();
    System.out.println("任務(wù)4耗時：" + (end - begin));
    return new AsyncResult<String>("任務(wù)4");
  }
  
  public Future<String> task5() throws InterruptedException {
    long begin = System.currentTimeMillis();
    Thread.sleep(2000);
    long end = System.currentTimeMillis();
    System.out.println("任務(wù)5耗時：" + (end - begin));
    return new AsyncResult<String>("任務(wù)5");
  }
  
  public Future<String> task6() throws InterruptedException {
    long begin = System.currentTimeMillis();
    Thread.sleep(3000);
    long end = System.currentTimeMillis();
    System.out.println("任務(wù)6耗時：" + (end - begin));
    return new AsyncResult<String>("任務(wù)6");
  }
}

2.添加測試控制器

package top.ytheng.demo.controller;

import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import top.ytheng.demo.task.AsyncTask;

@RestController
@RequestMapping("api/v1/async")
public class TaskController {

  @Autowired
  private AsyncTask asyncTask;
  
  @GetMapping("/test")
  public Object test() throws InterruptedException, ExecutionException {
    long begin = System.currentTimeMillis();
    //asyncTask.task1();
    //asyncTask.task2();
    //asyncTask.task3();
    Future<String> result1 = asyncTask.task4();
    Future<String> result2 = asyncTask.task5();
    Future<String> result3 = asyncTask.task6();
    System.out.println("返回結(jié)果:" + result1.get() + "," + result2.get() + "," + result3.get());
    for(;;) {
      if(result1.isDone() && result2.isDone() && result3.isDone()) {
        break;
      }
    }
    long end = System.currentTimeMillis();
    long total = end - begin;
    System.out.println("總耗時：" + total);
    return "總耗時:" + total;
  }
}

3.添加啟動類

package top.ytheng.demo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;

import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;

@SpringBootApplication //等于下面3個
//@SpringBootConfiguration
//@EnableAutoConfiguration
//@ComponentScan
//攔截器用到
@ServletComponentScan
//MyBatis用到
@MapperScan("top.ytheng.demo.mapper")
//定時使用(開啟定時任務(wù))
@EnableScheduling
//開啟異步任務(wù)
@EnableAsync
public class DemoApplication {

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

4.右鍵項目Run As啟動，訪問url