程序在可执行jar中的“ new MimeMessage（session）”上退出

Question

我正在使用javax.mail-1.6.1.jar从我的gmail帐户发送电子邮件。
当我在eclipse上运行程序时，它运行良好，但是当我将程序作为可执行jar运行时，它在该行上停止-MimeMessage message = new MimeMessage（session）;
没有异常。

public void sendEmail(String from, String to,String subject, String body, 
String attachmentName){
  try {
      Session session = Session.getDefaultInstance(fMailServerConfig, new SMTPAuthenticator());
      Log.getInstance(Emailer.class).getLogger().error("getProperty == "+fMailServerConfig.getProperty("mail.smtp.host"));

      MimeMessage message = new MimeMessage(session);
      message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
      message.setSubject(subject);
      message.setSentDate(new Date());

      // Set the email msg text.
      MimeBodyPart messagePart = new MimeBodyPart();
      messagePart.setText(body);

      // Set the email attachment file
      FileDataSource fileDataSource = new FileDataSource(attachmentName);
      MimeBodyPart attachmentPart = new MimeBodyPart();
      attachmentPart.setDataHandler(new DataHandler(fileDataSource));
      attachmentPart.setFileName(fileDataSource.getName());

      // Create Multipart E-Mail.
      Multipart multipart = new MimeMultipart();
      multipart.addBodyPart(messagePart);
      multipart.addBodyPart(attachmentPart);

      message.setContent(multipart);
      // Send the msg. Don't forget to set the username and password
      // to authenticate to the mail server.
      Transport.send(message);
  } catch (Exception e) {
      Log.getInstance(Emailer.class).getLogger().error("Cannot send email."+ e);
      System.err.println("Cannot send email. " + e);
  }

}