接收郵件時出錯[email protected]

Question

嗨，我一直在研究接收郵件的應用程序。我必須展示主題，正文，附件。問題是當郵件中有可用的附件時，郵件的內容沒有得到顯示。它顯示如javax.mail.internet.MimeMultipart@268d15。我搜索了很多網站，但沒有找到解決方案。請幫助我..

我的代碼是

import java.util.Properties; 
import javax.mail.Address; 
import javax.mail.Folder; 
import javax.mail.Message; 
import javax.mail.Multipart; 
import javax.mail.Part; 
import javax.mail.Session; 
import javax.mail.Store; 
import javax.mail.internet.MimeBodyPart; 

public class EmailAttachReceiver { 

String fileName; 
public void downloadEmailAttachments(String userName, String password) { 

    try { 

     Properties props = new Properties(); 
     props.setProperty("mail.store.protocol", "imaps"); 
     Session session = Session.getInstance(props, null); 
     Store store = session.getStore(); 
     store.connect("imap.gmail.com", userName, password); 
     Folder folderInbox = store.getFolder("INBOX"); 
     folderInbox.open(Folder.READ_ONLY); 
     Message[] arrayMessages = folderInbox.getMessages(); 
     for (int i = 0; i < arrayMessages.length; i++) { 
      //i=arrayMessages.length-1; 
      Message message = arrayMessages[i]; 
      Address[] fromAddress = message.getFrom(); 
      String from = fromAddress[0].toString(); 
      String subject = message.getSubject(); 
      String sentDate = message.getSentDate().toString(); 
      String contentType = message.getContentType(); 
      String messageContent = ""; 
      String attachFiles = ""; 

      if (contentType.contains("multipart")) { 
       //System.out.println("contentType 1 "+contentType); 
       Multipart multiPart = (Multipart) message.getContent(); 
       int numberOfParts = multiPart.getCount(); 
       //System.out.println("numberOfParts 1 "+numberOfParts); 
       for (int partCount = 0; partCount < numberOfParts; partCount++) { 
        MimeBodyPart part = (MimeBodyPart) multiPart.getBodyPart(partCount); 
        if (Part.ATTACHMENT.equalsIgnoreCase(part.getDisposition())) { 
         // System.out.println("partCount 1 " + partCount); 
         fileName = part.getFileName(); 
        } else { 
         // System.out.println("partCount 2 "+partCount); 
         messageContent = part.getContent().toString(); 
        } 
       } 

      } else if (contentType.contains("text/plain") 
        || contentType.contains("text/html")) { 
       //System.out.println("contentType 2 " + contentType); 
       Object content = message.getContent(); 
       if (content != null) { 
        messageContent = content.toString(); 
       } 
      } 

      System.out.println("Message #" + (i + 1) + ":"); 
      System.out.println("\t From: " + from); 
      System.out.println("\t Subject: " + subject); 
      System.out.println("\t Sent Date: " + sentDate); 
      System.out.println("\t Message: " + messageContent); 
      System.out.println("\t Attachments: " + fileName); 
     } 

     folderInbox.close(false); 
     store.close(); 
    } catch (Exception ex) { 
     ex.printStackTrace(); 
    } 
} 

public static void main(String[] args) { 

    String userName = ""; 
    String password = ""; 
    EmailAttachReceiver receiver = new EmailAttachReceiver(); 
    receiver.downloadEmailAttachments(userName, password); 

} 

}

Answer 1

什麼是失敗的樣本消息的結構？您是否正在運行一個多部分嵌套的消息？ JavaMail msgshow.java sample program可以顯示消息的結構。另請參閱this JavaMail FAQ entry for finding the main body part in a message。