spring boot 异步执行耗时方法

1、在启动类上添加开启异步注解

@EnableAsync
@SpringBootApplication
public class SpringBoot04taskApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBoot04taskApplication.class, args);
    }

}

2、在Service层的方法上加上异步注解@Async

package com.laoxu.task.service.impl;

import com.laoxu.task.service.HelloService;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

@Service
public class HelloServiceImpl implements HelloService {

    @Override
    @Async
    public void sayHello() throws InterruptedException {
        Thread.sleep(5000);
        System.out.println("Hello World");
    }
}

3、控制器调用Service层的方法

package com.laoxu.task.controller;

import com.laoxu.task.service.HelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @Autowired
    private HelloService helloService;

    @GetMapping("/hello")
    public String hello() throws InterruptedException {
        helloService.sayHello();
        return "success";
    }
}

在5秒后打印Hello World