异步任务

1、Service

package com.sw.service;

import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

/**
 * @Author suaxi
 * @Date 2020/12/26 15:57
 */

@Service
public class AsyncService {

    //告诉Spring这是一个异步任务
    @Async
    public void hello(){
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("数据正在加载...");
    }
}

2、Controller

package com.sw.controller;

import com.sw.service.AsyncService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @Author suaxi
 * @Date 2020/12/26 15:58
 */

@RestController
public class AsyncController {

    @Autowired
    private AsyncService asyncService;

    @RequestMapping("/test")
    public String hello(){
        asyncService.hello();
        return "Ok";
    }
}

3、SpringBoot启动类开启异步任务的注解

package com.sw;

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

@EnableAsync //开启异步任务注解
@SpringBootApplication
public class Springboot09AsynctaskApplication {

    public static void main(String[] args) {
        SpringApplication.run(Springboot09AsynctaskApplication.class, args);
    }

}

当用户执行/test请求时，前端页面及时返回结果，同时异步任务延迟三秒在控制台打印输出结果