小编Rav*_*ran的帖子

这是代码:

      Session session = Session.getDefaultInstance(props, null);
      Store store = session.getStore("imaps");
      store.connect("imap.gmail.com", "****@gmail.com", "****");
      System.out.println(store);
      Folder folder = store.getDefaultFolder();
      folder = folder.getFolder("INBOX");
      folder.open(Folder.READ_ONLY);

      System.out.println("Message Count: "+folder.getMessageCount());
      System.out.println("Unread Message Count: "+folder.getUnreadMessageCount());


           Message[] messages = folder.getMessages();  --> here the code stops.

      FetchProfile fp = new FetchProfile();
      fp.add(FetchProfile.Item.ENVELOPE);
      folder.fetch(messages, fp);

      for (int i = 0; i< messages.length; i++) 
      { 
          System.out.println("From:"+ messages[i].getFrom()); 
          }

代码给出了以下的摘要并在显示的位置停止.

线程"main"中的异常java.lang.NoClassDefFoundError:com.google.code.com中的com.google.code.com.sun.mail.imap.MessageCache.getMessage(MessageCache.java:129)中的javax/activation/DataSource openReports.OpenReports.main中的.sun.mail.imap.IMAPFolder.getMessage(IMAPFolder.java:1394)

请弄清楚这一点.代码正常运行,没有任何异常.

        FTPClient ftp = new FTPClient();
        ftp.connect(server);
        if(!ftp.login(username, password))
        {
            ftp.logout();
            return false;
        }
        int reply = ftp.getReplyCode();
        if (!FTPReply.isPositiveCompletion(reply))
        {
            ftp.disconnect();
            return false;
        }
        InputStream in = new FileInputStream(localfile);
        ftp.setFileType(ftp.BINARY_FILE_TYPE, ftp.BINARY_FILE_TYPE);
        ftp.setFileTransferMode(ftp.BINARY_FILE_TYPE);
        Store = ftp.storeFile(destinationfile, in);
        in.close();
        ftp.logout();
        ftp.disconnect();
    }
    catch (Exception ex)
    {
        ex.printStackTrace();
        return false;
    }
    return Store;

Buttttttttt

return语句始终返回false,并且文件未上载到服务器上.有人请帮忙.

为了您的信息,1)我在办公室网络.--->我们需要添加任何代理吗？

          File file = new File("C:\\Users\\sg0214273\\Desktop\\seagate\\seagate.txt");
          FileInputStream input = new FileInputStream(file);
          client.setFileType(FTP.BINARY_FILE_TYPE);
          if (!client.storeFile(file.getName(), input)) {
            System.out.println("upload failed!");
          } 
          reply = client.getReplyCode();

            if(!FTPReply.isPositiveCompletion(reply)) {
                System.out.println("upload failed!");
            } …

我周末一直在家里使用Gmail-Imap-Api.它正常工作但是当我回到办公室并且在这里尝试它会抛出异常.

    Properties props = System.getProperties();
    props.put("mail.store.protocol", "imaps");
    props.put("mail.smtp.auth", "true");

    try {
        boolean debug = false;
        Authenticator auth = new SMTPAuthenticator(
                "***", "***");

        Session session = Session.getInstance(props, auth);
        session.setDebug(debug);
        Store store = session.getStore("imaps");
        store.connect("imap.gmail.com", "***@gmail.com",
                "****");
    ......
    ......

这在家庭netwrok工作正常.现在我想我会添加代理并添加这些代码行.

    System.setProperty("http.proxyHost", "****.com");
    System.setProperty("http.proxyPort", "8080");

它仍然没有用,例外是.

com.google.code.javax.mail.MessagingException: imap.gmail.com;
nested exception is:
java.net.UnknownHostException: imap.gmail.com
at com.google.code.com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:665)
at com.google.code.javax.mail.Service.connect(Service.java:295)
at com.google.code.javax.mail.Service.connect(Service.java:176)
at openReports.OpenReportsProject.main(OpenReportsProject.java:43)
Caused by: java.net.UnknownHostException: imap.gmail.com
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:177)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:367)
at java.net.Socket.connect(Socket.java:524)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:545)
at com.sun.net.ssl.internal.ssl.BaseSSLSocketImpl.connect(BaseSSLSocketImpl.java:141)
at com.google.code.com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:288)
at com.google.code.com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:231)
at com.google.code.com.sun.mail.iap.Protocol.<init>(Protocol.java:113)
at com.google.code.com.sun.mail.imap.protocol.IMAPProtocol.<init>(IMAPProtocol.java:110) …