javamail发送gmail邮件问题

try{
//Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
  String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
  // Get a Properties object
  Properties props = System.getProperties();
  props.setProperty("mail.smtp.host", "smtp.gmail.com");
  props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
  props.setProperty("mail.smtp.socketFactory.fallback", "false");
  props.setProperty("mail.smtp.port", "465");
  props.setProperty("mail.smtp.socketFactory.port", "465");
  props.setProperty("mail.smtp.auth", "true");
  props.setProperty("mail.smtp.ssl",  "true");
  //props.put("mail.smtp.user","hombreelk");
  //props.put("mail.smtp.password","hombre123");
  final String username = "wahaha1982";
  final String password = "wahaha123";
  Session session = Session.getDefaultInstance(props, new Authenticator(){
      protected PasswordAuthentication getPasswordAuthentication() {
          return new PasswordAuthentication(username, password);
      }});        // -- Create a new message --
  Message msg = new MimeMessage(session);   // -- Set the FROM and TO fields --
  msg.setFrom(new InternetAddress(username + "@gmail.com"));
  msg.setRecipients(Message.RecipientType.TO, 
    InternetAddress.parse("[email protected]",false));
  msg.setSubject("Hello");
  msg.setText("How are you");
  msg.setSentDate(new java.util.Date());
  Transport.send(msg);
  
  System.out.println("Message sent.");
}catch(Exception ex)
{
ex.printStackTrace();
}用这段程序可以将邮件发送出去，但是报下面的异常：
javax.mail.MessagingException: Exception reading response;
  nested exception is:
javax.net.ssl.SSLException: Unsupported record version Unknown-50.49
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1598)
at com.sun.mail.smtp.SMTPTransport.close(SMTPTransport.java:685)
at javax.mail.Transport.send0(Transport.java:171)
at javax.mail.Transport.send(Transport.java:98)
at cn.handinfo.mail.impl.MailServiceImpl.main(MailServiceImpl.java:473)
Caused by: javax.net.ssl.SSLException: Unsupported record version Unknown-50.49
at com.sun.net.ssl.internal.ssl.InputRecord.readV3Record(Unknown Source)
at com.sun.net.ssl.internal.ssl.InputRecord.read(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(Unknown Source)
at com.sun.net.ssl.internal.ssl.AppInputStream.read(Unknown Source)
at com.sun.mail.util.TraceInputStream.read(TraceInputStream.java:97)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at com.sun.mail.util.LineInputStream.readLine(LineInputStream.java:75)
at com.sun.mail.smtp.SMTPTransport.readServerResponse(SMTPTransport.java:1576)
... 4 more