java - 阅读从 GMail 发送的邮件

Question

我在我的 Android 应用程序中使用 JavaMail 阅读邮件。我试图涵盖所有组合，即在自定义服务器/Gmail ID/Live ID 上发送/接收的邮件。

从带有附件的 GMail 发送的一些邮件会出现问题。我能够收到附件，但内容返回 javax.mail.internet.MimeMultipart@44f2e698

这是用于接收和阅读消息的代码:

    Properties props = System.getProperties();
    props.setProperty("mail.store.protocol", "imap");

    try {
     /* Create the session and get the store for read the mail. */
     Session session = Session.getInstance(props, null);
     Store store = session.getStore("imaps");
     store.connect("imap.gmail.com", Username, Password);

     /* Mention the folder name which you want to read. */
     Folder inbox = store.getFolder("INBOX");
     System.out.println("No of Unread Messages : " + inbox.getUnreadMessageCount());         

     /* Open the inbox using store. */
     inbox.open(Folder.READ_ONLY);

     Message messages[] = inbox.getMessages();       
     Log.d("Inbox", "Message Count: "+inbox.getMessageCount());

     for (int i = messages.length - 1 ; i > 0; --i) {
         Log.i("ContentType", "ContentType: "+messages[i].getContentType());

         Object msgContent = messages[i].getContent();

         String content = "";

         /* Check if content is pure text/html or in parts */            
         if (msgContent instanceof Multipart) {

             Multipart multipart = (Multipart) msgContent;

             Log.e("BodyPart", "MultiPartCount: "+multipart.getCount());

             for (int j = 0; j < multipart.getCount(); j++) {

              BodyPart bodyPart = multipart.getBodyPart(j);

              String disposition = bodyPart.getDisposition();

              if (disposition != null && (disposition.equalsIgnoreCase("ATTACHMENT"))) { // BodyPart.ATTACHMENT doesn't work for gmail
                  System.out.println("Mail have some attachment");

                  DataHandler handler = bodyPart.getDataHandler();
                  System.out.println("file name : " + handler.getName());                                 
                }
              else { 
                  System.out.println("Content: "+bodyPart.getContent());
                  content= bodyPart.getContent().toString();
                }
            }
         }
         else                
             content= messages[i].getContent().toString();

我对有问题的邮件的了解:

• getFrom 也返回名称，即它以这种格式出现 FirstName LastName &ltemailID@gmail.com>

• MultiPart 包含 2 个 BodyPart:

  • BodyPart 1 返回内容为 javax.mail.internet.MimeMultipart@44f2e698

  • BodyPart 2 返回正确的附件名称

Answer 1

BodyPart 1 returns the content as javax.mail.internet.MimeMultipart@44f2e698

尝试在 MimeMultiPart 上调用 getBodyPart

这可能会返回一个 MimeBodyPart，您可以调用 getContent()在 http://docs.oracle.com/javaee/5/api/javax/mail/internet/MimeBodyPart.html#content