Javamail：无法发送包含邮件正文、文本/html和附件的电子邮件。

我能够获得邮件中的所有消息、html和附件，但消息文本作为文本文件接收

我希望邮件中能显示这条信息。如有任何帮助，将不胜感激

     final String subject = "Automation Execution Report"; 

必须发送的消息文本

    StringBuilder msg = new StringBuilder();
    msg.append("Hi All"+"\n");
    msg.append("We have executed the Automation Suite in current 
    build."+"\n");
    msg.append("Please find the automation report in the attachment");

    try {

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress(from));
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse(to));
        //below code only requires if your want cc email address
        message.setSubject(subject);
        File dir = new File(System.getProperty("user.dir")+ 
        File.separator+"test_reports");
        File[] files = dir.listFiles();

        File lastModifiedFile = files[0];
        for (int i = 1; i < files.length; i++) {
           if (lastModifiedFile.lastModified() < files[i].lastModified()) {
               lastModifiedFile = files[i];
           }
        }
        String attach = lastModifiedFile.toString();

以html格式打印在邮件上的自定义报告

        MimeBodyPart htmlpart = new MimeBodyPart();
        StringWriter writer = new StringWriter();
        IOUtils.copy(new FileInputStream(new File("D:\\SVN CODE\\test- 
         output\\customized-emailable-report.html")), writer);
        htmlpart.setContent(writer.toString(), "text/html");

        child.addBodyPart(htmlpart);

必须打印在邮件上的消息文本

        MimeBodyPart txtpart=new MimeBodyPart();
        txtpart.setContent(msg.toString(), "text/plain");
        child.addBodyPart(txtpart);
        //Adding the child multipart to parent multtipart     
        MimeBodyPart sub=new MimeBodyPart();
        sub.setContent(child);
        parent.addBodyPart(sub);
        //Attachment part   
        BodyPart attachPart = new MimeBodyPart();
        DataSource source = new FileDataSource(attach);
        attachPart.setDataHandler(new DataHandler(source));
        attachPart.setFileName("Test Automation report.html");
        parent.addBodyPart(attachPart);

将内容设置为消息

         message.setContent(parent);

        System.out.println("Sending");

        Transport transport = session.getTransport("smtp");
        transport.connect(host,25,from, password);
        transport.sendMessage(message, message.getAllRecipients());
        transport.close();

        System.out.println("Done");

      } 

  [1]: https://i.stack.imgur.com/InHyZ.png
Please advise as to how the message text can be printed on the mail

您需要使用并向其中添加元素

MimeMultipart multipart = new MimeMultipart();

String htmlContent = "<p>Hello World!</p>"
// add HTML content here
final MimeBodyPart  messageBodyPart = new MimeBodyPart();
// HTML Content
messageBodyPart.setContent(htmlContent, "text/html;charset=UTF-8");

// add it
multipart.addBodyPart(messageBodyPart);

// don't forget to add the content to your message.
message.setContent(multipart);

编辑 没有看到您已经在使用多部分。

---

这里的问题只在于所设置的内容类型。您必须使用

“text/html”

而不是

“text/plain”

我也尝试过，文本以html文件的形式出现。我需要在邮件中打印字符串。您是否尝试过设置在附件之前先附加邮件？

MimeMultipart multipart = new MimeMultipart();

String htmlContent = "<p>Hello World!</p>"
// add HTML content here
final MimeBodyPart  messageBodyPart = new MimeBodyPart();
// HTML Content
messageBodyPart.setContent(htmlContent, "text/html;charset=UTF-8");

// add it
multipart.addBodyPart(messageBodyPart);

// don't forget to add the content to your message.
message.setContent(multipart);

     String filePath = "/tmp/dummy.txt"
     MimeBodyPart bodyPart = new MimeBodyPart();
     DataSource source = new FileDataSource(filePath);
     bodyPart.setDataHandler(new DataHandler(source));
     bodyPart.setFileName(fileName);
     multipart.addBodyPart(bodyPart);