springboot简单使用定时(corn)和邮箱发送功能

Posted 2022-01-27 冷血～多好

在配置文件application.properties

spring.mail.username=[e-mail]
spring.mail.password=koapxsjyssdsdcbdjj(在自己邮箱设置拿到密码)
spring.mail.host=smtp.qq.com
#开启加密验证
spring.mail.properties.mail.smtp.ssl.enable=true

test类测试发送

package com.chen.springboot08assignment;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.mail.MailMessage;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;

@SpringBootTest
class Springboot08AssignmentApplicationTests 


    @Autowired
    JavaMailSenderImpl mailSender;
    @Test
    void contextLoads() 

        //一个简单的邮件
       SimpleMailMessage mailMessage= new SimpleMailMessage();
       mailMessage.setSubject("hello");
       mailMessage.setText("好好学习哈");
       mailMessage.setTo("[e-mail]");
       mailMessage.setFrom("[e-mail]");

        mailSender.send(mailMessage);
    


    @Test
    void contextLoads2() throws MessagingException 

        //一个复杂的邮件
        MimeMessage mailMessage=mailSender.createMimeMessage();

        //组装
        MimeMessageHelper  helper=new MimeMessageHelper( mailMessage,true);
       //正文
        helper.setSubject("哈哈哈，下午好");
        helper.setText("<p style='color:red'>goodgoodstudy,daydayup</p>",true);

        //附件
        helper.addAttachment("1.jpg",new File("C:\\\\Users\\\\86151\\\\Pictures\\\\Saved Pictures\\\\1.jpg"));
        helper.addAttachment("2.jpg",new File("C:\\\\Users\\\\86151\\\\Pictures\\\\Saved Pictures\\\\1.jpg"));
        helper.setTo("[e-mail]");
        helper.setFrom("[e-mail]");
        mailSender.send(mailMessage);
    

使用定时功能

在springboot启动类添加注解

@EnableScheduling//开启定时功能的注解


@SpringBootApplication
public class Springboot08AssignmentApplication 

    public static void main(String[] args) 
        SpringApplication.run(Springboot08AssignmentApplication.class, args);
    

测试使用

package com.chen.springboot08assignment.service;


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

@Service
public class ScheduledService 

    //在一个特定的时间执行这个方法

    //cron表达式
    //秒 分 时 日 月 周
    /*
    30 15 10 * * ?      代表每天10点15分执行一次
    30 0/5 10,18 * * ？   代表每天10点和18点，每隔五分钟执行一次
    0 15 10 ? * 1-6       每个月的周一到周六10.15分钟执行一次
    0/2 * * * * ？       每隔两秒执行一次
    */
    @Scheduled(cron="20 16 15 * * ?")
    public void hello()
        System.out.println("hello,你被执行了~");
    

使用异步延时功能

在springboot启动类添加注解

@EnableAsync//开启异步注解功能


@SpringBootApplication
public class Springboot08AssignmentApplication 

    public static void main(String[] args) 
        SpringApplication.run(Springboot08AssignmentApplication.class, args);
    

创建一个AsyncService类

@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。。。");

    

创建一个控制类AsyncController

@RestController
public class AsyncController 


    @Autowired
    AsyncService asyncService;

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