SpringBoot 发送邮件功能详解及完整代码示例

• SprintBoot 实现发送邮件功能很简单，相应的 jar 包已被封装到 starter 中，相应的 pom.xml 文件中添加 starter 依赖：
  

• 目录结构如下：
  

• 配置文件 application.yml 如下：

spring:
  mail:
    host: smtp.qq.com
    username: xxxxxx@qq.com//用于发送邮件的邮箱
    password: xxxxxxxxxxxxxxx//这里是相应邮箱开启POP3/SMTP、IMAP/SMTP服务后生成的授权码

• QQ邮箱授权码获取如下图：
  

• 发送邮件接口类：SendMailService.java：

//SendMailService.java
package com.example.sprintboot_demo.mail;

import javax.mail.MessagingException;

public interface SendMailService {
    
    
    void sendMail() throws MessagingException;
}

• 发送邮件接口实现类：SendMailServiceImpl.java：

//SendMailServiceImpl.java
package com.example.sprintboot_demo.mail.impl;

import com.example.sprintboot_demo.mail.SendMailService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;

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

@Service
public class SendMailServiceImpl implements SendMailService {
    
    

    @Autowired
    private JavaMailSender javaMailSender;

    private String from = "[email protected]";
    private String to = "[email protected]";
    private String subject = "springboot测试邮件";
    private String text = "你好：这是一封测试邮件。请坚持下去。加油！<a href='https://blog.csdn.net/qq_38132105'>点击访问个人主页</a>\n" +
            "<img src='https://img2.baidu.com/it/u=1304528740,1822991787&fm=253&fmt=auto&app=138&f=JPEG?w=661&h=395' />";


    @Override
    public void sendMail() {
    
    

        //只能发送文本邮件
//        SimpleMailMessage mailMessage = new SimpleMailMessage();
//        mailMessage.setFrom(from);
//        mailMessage.setTo(to);
//        mailMessage.setSubject(subject);
//        mailMessage.setText(text);
//        javaMailSender.send(mailMessage);

        //发送多媒体邮件
        try {
    
    
            MimeMessage message = javaMailSender.createMimeMessage();

            //第二个参数控制着附件上传
            MimeMessageHelper helper = new MimeMessageHelper(message, true);

            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);

            //第二个参数表示以 html 语法解析文本
            helper.setText(text, true);


            File file1 = new File("D:\\aspring\\图片.jpeg");
            File file2 = new File("D:\\aspring\\邮件发送附件.txt");
            File file3 = new File("D:\\aspring\\邮件发送附件.zip");

            //添加附件
            helper.addAttachment("图片.jpeg", file1);
            helper.addAttachment("邮件发送附件.txt", file2);
            helper.addAttachment("邮件发送附件.zip", file3);

            javaMailSender.send(message);

        }catch (Exception e){
    
    
            e.printStackTrace();
            return;
        }

    }
}

• 实现效果如下图所示：