Question

发送或转发电子邮件没问题。但是，当我尝试发送和附件为mime multipart时，附件不会被发送。我已经搜索了现有的帖子并尝试了多种方法来修复。低级MailService工作，但JavaMail不工作。我将发布两个代码片段，希望有人会得到答案。

发件人是应用管理员，但已在代码段中进行了更改。

什么有效，这是低级API调用：

        String htmlBody = "Data dump from " + host + ". See attached.";
        Properties props = new Properties();
        Session session = Session.getInstance(props, null); // not used
        MailService service = MailServiceFactory.getMailService();
        MailService.Message msg = new MailService.Message();
        msg.setSender("myUser@gmail.com");
        msg.setTo("anotherUser@gmail.com");
        msg.setSubject("Committee Participation Report");
        msg.setHtmlBody(htmlBody);
        MailService.Attachment attachment = new MailService.Attachment("data-dump.cvs",
                report.getBytes());
        msg.setAttachments(attachment);
        service.send(msg);

什么不起作用，JavaMail API调用：

    Properties props = new Properties();
    Session session = Session.getInstance(props, null);
    Message msg = new MimeMessage(session);
    msg.setFrom("admins");
    msg.addRecipient(Message.RecipientType.TO, "aUser@gmail.com");
    msg.setSubject("a subject");

    Multipart mp = new MimeMultipart();

    MimeBodyPart htmlPart = new MimeBodyPart();
    htmlPart.setContent(htmlBody, "text/html");     
    mp.addBodyPart(htmlPart);

    MimeBodyPart attachment = new MimeBodyPart();
    attachment.setDataHandler(new DataHandler(new ByteArrayDataSource(report.getBytes(), "text/comma-separated-values")));
    attachment.setFileName("cvsfile.csv");      
    mp.addBodyPart(attachment);

    msg.setContent(mp);
    Transport.send(msg);

对于带或不带附件的电子邮件使用相同的API会很好，所以如果有人能够让JavaMail API发送附件，我想知道如何。

GAE / JavaMail发送附件不起作用

0 个答案: