SpringBoot异步任务

如果一个请求半天没处理完，网页是卡着的，ajax也没有信息返回。
可以把时间长的部分弄成异步的。

package com.lyd.swagger.service;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
//加上Async注解后，这个方法就变成了异步方法，不阻塞主线程
@Async
@Service
public class AsyncService {
    public void asyncHello()  {
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("处理数据中...");
    }
}

package com.lyd.swagger.controller;
import com.lyd.swagger.pojo.User;
import com.lyd.swagger.service.AsyncService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloController {
    @Autowired
    AsyncService asyncService;
    @GetMapping("/hello")
    public String hello(){
        asyncService.asyncHello();//开启了异步，就不阻塞主线程了
        return "处理成功";
    }
}

package com.lyd.swagger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableAsync;
//需要在程序入口处开启异步，才能使用异步方法
@EnableAsync
@SpringBootApplication
public class SwaggerApplication {
    public static void main(String[] args) {
        SpringApplication.run(SwaggerApplication.class, args);
    }
}