在Service类声明一个注解@Async作为异步方法的标识

package com.qf.sping09test.service;import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;@Service
public class AsyncService {//告诉spring这是一个异步的方法@Asyncpublic void hello(){try {Thread.sleep(3000);} catch (InterruptedException e) {e.printStackTrace();}System.out.println("数据正在处理...");}}

controller

package com.qf.sping09test.controller;import com.qf.sping09test.service.AsyncService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;@RestController
public class AsyncController {@AutowiredAsyncService asyncService;@RequestMapping("/hello")public String hello(){asyncService.hello();//停止三秒，转圈return "ok";}}

主启动类需要加一个注解

package com.qf.sping09test;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableAsync;@SpringBootApplication
@EnableAsync
public class Sping09TestApplication {public static void main(String[] args) {SpringApplication.run(Sping09TestApplication.class, args);}}