Javamail：无法发送带有邮件正文、文本/html 和附件的电子邮件。

Question

我能够获取邮件中的所有消息、html 和附件，但消息文本是作为文本文件接收的。

我希望邮件显示在邮件中。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();

创建了多部分

        Multipart parent = new MimeMultipart("alternative");
        Multipart child=new MimeMultipart("mixed");

        message.setSubject(subject);

在邮件中打印的 html 格式的自定义报告

        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);

给消息设置内容

         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

Answer 1

您需要使用MimeMultipart 并向其添加MimeBodyPart 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);

使用此方法，您可以将附件添加为另一个 MimeBodyPart ：

     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);

编辑 没有看到您已经在使用多部分。 您的问题仅在于您设置的内容类型。您必须使用"text/html" 而不是"text/plain"