Spring Boot使用异步功能

package com.sj.controller;

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

@RestController
public class AsyncController {
    @Autowired
    AsyncService asyncService;

    @RequestMapping("/hello")
    public String hello(){
        asyncService.hello();//停止三秒,转圈
        return "ok";
    }

}

package com.sj.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
    @Async
    public void hello(){
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("数据正在处理...");
    }
}

package com.sj;

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


//开启异步注解功能
@EnableAsync
@SpringBootApplication
public class SpringbootYibuApplication {

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

}

在没有添加 @Async @EnableAsync 网页会加载（转圈）三秒，添加之后网页不会加载3秒。因为有@Async标注方法， 它会在调用方的当前线程之外的独立的线程中执行。