Springboot sends email notification (163 mailbox as an example)

1 Introduction

In actual projects, the email notification function is often used. For example, users register by email, retrieve their passwords by email, etc.; for example, send system status by email, send report information by email, etc. There are many practical application scenarios. In this article, I will share with you the use of springboot to implement a function of sending emails. (The following function is to use message push)
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2. Open POP3 service

What are POP3, SMTP and IMAP?
2.1 Log in to the 163 mailbox on the PC side, click the setting button, and find POP3/SMTP/IMAP, which needs to be turned on, as shown in the figure:
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3. Code implementation process

3.1 Introducing dependencies


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

3.2 Configuration file

spring:
  mail:
    host: smtp.163.com
    username: 登录用户名
    password: 刚刚自己设置的授权码
    default-encoding: utf-8
    properties:
      mail:
        smtp:
          auth: true
          starttls:
            enable: true
            required: true

3.3 Implementation class code

package com.style.service.impl;

import com.style.model.dto.MailDTO;
import com.style.service.MailService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

/**
 * @author xufan1
 * 邮箱发送实现类
 */
@Service
@Component
public class MailServiceImpl implements MailService {
    
    

    @Autowired
    private MailSender mailSender;

    @Override
    public void send(MailDTO mailDTO) {
    
    
        // new 一个简单邮件消息对象
        SimpleMailMessage message = new SimpleMailMessage();
        // 和配置文件中的的username相同，相当于发送方
        message.setFrom("你自己的@163.com");
        // 收件人邮箱
        message.setTo(mailDTO.getMail());
        // 标题
        message.setSubject(mailDTO.getTitle());
        // 正文
        message.setText(mailDTO.getContent());
        // 发送
        mailSender.send(message);


    }


}

3.4 Join DTO

package com.style.model.dto;
import lombok.Data;
import javax.validation.constraints.NotEmpty;
import java.io.Serializable;

/**
 * @author xufan1
 * 邮箱发送-前端传输参数
 */
@Data
public class MailDTO implements Serializable {
    
    

    /**
     * 接受邮箱账户
     */
    @NotEmpty(message = "邮箱不可为空")
    private String mail;
    
    /**
     * 邮箱标题
     */
    @NotEmpty(message = "邮箱标题不可为空")
    private String title;

    /**
     * 要发送的内容
     */
    @NotEmpty(message = "内容不可为空")
    private String content;

}

4. Start the service and use postman to call the interface. The
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request is successful

4.5 Check whether the partner's email
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address is successfully received This blog is sharing a very simple demo, and the project needs to push emails according to specific business needs.