javax.activation.UnsupportedDataTypeException: MIME 类型 multipart/mixed 没有对象 DCH；边界 [英] javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/mixed; boundary

问题描述

目前我正在内联编写将侦听目录的代码.当该目录更新为 .apk 文件时，我会将带有此 .apk 文件的邮件发送到 gmail 帐户.我在我的程序中使用 Jnotify 和 JAVA Mail.

Currently I'm inline of writing a code that will be listening to a directory. when the directory is updated with .apk file, I'll send a mail with this .apk file to a gmail account. I'm using Jnotify and JAVA Mail in my program.

我得到的错误是，

javax.mail.MessagingException: IOException while sending message;
  nested exception is:
javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/mixed; boundary="----=_Part_0_145238.1392728439484"

我寻找了 stackoverflow 中给出的解决方案以寻求帮助，但没有一个有帮助.

I looked for the solutions given in the stackoverflow for help but none of them where helpful.

提前致谢

public void fileCreated(int wd, String rootPath, String name) {
    print("created " + rootPath + " : " + name);

    if (name.contains(".apk"))
      SendEmail(name);
    else
        System.out.println("Not the APK file");
}

void SendEmail(String strname){
    String Path = "D:/POC/Email/apk folder/"+strname;
    System.out.println("Path->" + Path);

    Properties props = new Properties();
    props.put("mail.smtp.host","173.194.78.108");
    props.put("mail.smtp.socketFactory.port", "465");
    props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtp.auth","true");
    props.put("mail.smtp.port","465");

    System.out.println("Properties has been set properly");

    Session session = Session.getDefaultInstance(props,
        new javax.mail.Authenticator(){
            protected PasswordAuthentication getPasswordAuthentication(){
                return new PasswordAuthentication("[e-mail]", "senderPassword");
            }
        }
    );

    System.out.println("Session Created successfully");

    try{
        Message message = new MimeMessage(session); 
        message.setFrom(new InternetAddress("[e-mail]"));
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("[e-mail]"));
        message.setSubject("Android : " + strname);

        MimeBodyPart msgbody = new MimeBodyPart();
        msgbody.setText("This is the message content which is sent using JAVA MAIL 1.4.5");
        Multipart mulpart = new MimeMultipart();
        mulpart.addBodyPart(msgbody);

        //Attachement Starts here.
        msgbody = new MimeBodyPart();
        javax.activation.DataSource source = new FileDataSource(Path);
        msgbody.setDataHandler(new DataHandler(source));
        msgbody.setFileName(strname);
        message.setContent(mulpart);

        System.out.println("Attached the message going to start transporting the mail");

        //If I've the code before sending the email is getting sent but without attachment. 
        //Thread.currentThread().setContextClassLoader( getClass().getClassLoader() );

        Transport.send(message);
        System.out.println("Mail Sent successfully");
    }
    catch(MessagingException msg){
        msg.printStackTrace();
    }
    catch(Exception e){
        e.printStackTrace();
    }
}

推荐答案

这个问题可以通过以下两个步骤来解决.

This issue can get a solution by taking up the below two steps.

1. 确保 java 邮件是 1.4.7.(以前我使用 1.4.5 这导致了所有的混乱).从 http://www.oracle.com/technetwork/java/index- 下载它138643.html
2. 在发送消息之前添加这段代码:

    Thread.currentThread().setContextClassLoader( getClass().getClassLoader() );

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