Springboot asynchronous, mail, and timed tasks.

Original
join here set stop 3s

package com.jj.demo.service;

import org.springframework.stereotype.Service;

@Service
public class Asnycservice {
    
    
    public void hello() throws InterruptedException {
    
    
        Thread.sleep(3000);
        System.out.println("数据在处理！！");
    }
}

Console code

package com.jj.demo.controller;

import com.jj.demo.service.Asnycservice;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;

@Controller
public class Asnycontrller {
    
    
//    注入service
    @Autowired
    Asnycservice asnycservice;
      @RequestMapping("/hello")
    @ResponseBody
    public String demo1() throws Exception {
    
    
        asnycservice.hello();
        return "ok!";
    }
}

Effect, the user will wait on the page

At this time, we can use Springboot's asynchronous task, only need to open two annotations, purpose, if we are sending emails, we must first tell the user that it is sending, the background can process data.


That's it,
effect

mail,
simple text mail,
import dependency

<!--        邮箱的-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>

L yml

#邮箱的配置
spring:
  mail:
    host: smtp.163.com
    username: ************@163.com
    password: ****************
    protocol: smtp
    default-encoding: UTF-8

Write in the test class. The second

effect is

to send unusual emails!

Effects,

colors and pictures are here!

Timed tasks,
critical interfaces

TaskScheduler task scheduler
TackExecutor task executor
, add comments to the main program

Write in the business layer

package com.jj.demo.service;

import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

@Service
public class Schedulingservice {
    
    
    //cron 表达式
    //秒 分 时 日 月  周几
    @Scheduled(cron = "0 38 16 * * ?")
public  void helo(){
    
    
        System.out.println("哈哈哈哈哈");
    }
}

The effect of

Baidu's a cron expression