.zip文件在java中发送电子邮件时被转换成.bin文件 [英] .zip file gets converted to .bin file while sending the email in java

问题描述

我正在尝试使用 zip文件作为附件发送邮件，我可以发送电子邮件，但zip文件的附件被转换为某些 .bin 文件。
我需要设置一些属性吗？
为什么zip文件被转换成.bin文件？

I am trying to send mail using below snippet with the zip file as attachment,I am able to send the email but the attachment which is zip file gets converted to some .bin file. Do I need to set some properties? Why zip file gets converted to .bin file?

Properties props = new Properties();
            props.setProperty("mail.transport.protocol", "smtp");
            props.setProperty("mail.host", "smtp.gmail.com");

            Session mailSession = Session.getDefaultInstance(props, null);
            mailSession.setDebug(true);
            Transport transport = mailSession.getTransport();

            MimeMessage message = new MimeMessage(mailSession);
            message.setSubject("HTML  mail with images");
            message.setFrom(new InternetAddress("[e-mail]"));
            message.addRecipient(Message.RecipientType.TO,
                 new InternetAddress("[e-mail]"));
            MimeMultipart multipart = new MimeMultipart("related");

            // first part  (the html)
            BodyPart messageBodyPart = new MimeBodyPart();
            String htmlText = "PFA Query Output.";
            messageBodyPart.setContent(htmlText, "text/html");

            // add it
            multipart.addBodyPart(messageBodyPart);

            // second part (the image)
            messageBodyPart = new MimeBodyPart();
            DataSource fds = new FileDataSource(zipFilePath);
            messageBodyPart.setDataHandler(new DataHandler(fds));
            messageBodyPart.setHeader("Content-ID","<image>");

            // add it
            multipart.addBodyPart(messageBodyPart);

            // put everything together
            message.setContent(multipart);

            transport.connect();
            transport.sendMessage(message,
                message.getRecipients(Message.RecipientType.TO));
            transport.close();

推荐答案

删除 messageBodyPart.setHeader Content-ID，< image>）如果您没有发送图像。

Remove messageBodyPart.setHeader("Content-ID","<image>") if you're not sending image.

添加以下语句集附件文件名，

Add follwing statement set attachment filename,

  messageBodyPart.setFileName(zipFilePath);

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