异步任务 异步任务1、Servicepackage 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、Controllerpackage 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