SpringBoot邮件发送通知或邮件群发通知

SpringBoot邮件发送通知或邮件群发通知

友情提醒：需要同时发送给多人的时间会长一些，可以给代码做时间优化，也可以使用原生的mail jar包，下面给上依赖，下面两个任选其一就可以

 <!-- 邮件发送 -->
        <!-- 邮件通知原生 -->
        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
        </dependency>
        <!-- 时间会久一点 -->
<!--        <dependency>-->
<!--            <groupId>org.springframework.boot</groupId>-->
<!--            <artifactId>spring-boot-starter-mail</artifactId>-->
<!--        </dependency>-->
        <dependency>
            <groupId>com.aliyun</groupId>
            <artifactId>aliyun-java-sdk-dysmsapi</artifactId>
        </dependency>

直接上代码，需要的参数也都很详细的标注出来了，直接postman测试就可以

/**
     * @param sendMail 发送人邮箱
     * @param authorizationCode 授权码
     * @param takeMails 收件人邮箱
     * */
    @ApiOperation("测试发送邮件")
    @GetMapping("/sendMail")
    public CommonResultPojo sendMail (@Param("sendMail")String sendMail,@Param("authorizationCode")String authorizationCode,
                                      @Param("takeMail")String[] takeMails) throws Exception {
        Properties prop = new Properties();
        prop.setProperty("mail.host", "smtp.qq.com");  //todo 设置QQ邮件服务器
        prop.setProperty("mail.transport.protocol", "smtp"); //todo 邮件发送协议
        prop.setProperty("mail.smtp.auth", "true"); //todo 需要验证用户名密码
        //todo QQ邮箱设置SSL加密
        MailSSLSocketFactory sf = new MailSSLSocketFactory();
        sf.setTrustAllHosts(true);
        prop.put("mail.smtp.ssl.enable", "true");
        prop.put("mail.smtp.ssl.socketFactory", sf);
        //todo 创建定义整个应用程序所需的环境信息的 Session 对象
        Session session = Session.getDefaultInstance(prop, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                //todo 传入发件人的姓名和授权码
                return new PasswordAuthentication(sendMail,authorizationCode);
            }
        });
        //todo 通过session获取transport对象
        Transport transport = session.getTransport();
        //todo 通过transport对象邮箱用户名和授权码连接邮箱服务器
        transport.connect("smtp.qq.com",sendMail,authorizationCode);
        //todo 创建邮件,传入session对象
        for(String takeMail:takeMails) {
            MimeMessage mimeMessage = complexEmail(session, sendMail, takeMail);
            //todo 发送邮件
            transport.sendMessage(mimeMessage, mimeMessage.getAllRecipients());
        }
        //todo 关闭连接
        transport.close();
        return new CommonResultPojo(200,"发送成功",1);
    }

    //todo 发送邮件方法
    public static MimeMessage complexEmail(Session session,@Param("sendMail")String sendMail,
                                           @Param("takeMail") String takeMails) throws MessagingException {
        //todo 消息的固定信息
        MimeMessage mimeMessage = new MimeMessage(session);
            //todo 发件人
            mimeMessage.setFrom(new InternetAddress(sendMail));
            //todo 收件人
            mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(takeMails));
            //todo 邮件标题
            mimeMessage.setSubject("带图片和附件的邮件");
            //todo 准备图片数据
            MimeBodyPart image = new MimeBodyPart();
            DataHandler handler = new DataHandler(new FileDataSource("D:\\hello.jpg"));
            image.setDataHandler(handler);
            image.setContentID("test.png"); //todo 设置图片id
            //todo 准备文本
            MimeBodyPart text = new MimeBodyPart();
            text.setContent("这是一段文本<img src='cid:test.png'>", "text/html;charset=utf-8");
            //todo 附件
            MimeBodyPart appendix = new MimeBodyPart();
            appendix.setDataHandler(new DataHandler(new FileDataSource("D:\\zzzz.txt")));
            appendix.setFileName("test.txt");
            //todo 拼装邮件正文
            MimeMultipart mimeMultipart = new MimeMultipart();
            mimeMultipart.addBodyPart(image);
            mimeMultipart.addBodyPart(text);
            mimeMultipart.setSubType("related"); //todo 文本和图片内嵌成功
            //todo 将拼装好的正文内容设置为主体
            MimeBodyPart contentText = new MimeBodyPart();
            contentText.setContent(mimeMultipart);
            //todo 拼接附件
            MimeMultipart allFile = new MimeMultipart();
            allFile.addBodyPart(appendix); //todo 附件
            allFile.addBodyPart(contentText); //todo 正文
            allFile.setSubType("mixed"); //todo 正文和附件都存在邮件中，所有类型设置为mixed
            //todo 放到Message消息中
            mimeMessage.setContent(allFile);
            mimeMessage.saveChanges(); //todo 保存修改
        if(mimeMessage !=null){
            System.out.println("邮件发送成功!!");
        }else {
            System.out.println("邮件发送失败!!");
        }

        return mimeMessage;
    }

同时发给多人结果如下：

{
    "code": 200,
    "message": "发送成功",
    "data": 1
}