Java Mail APIを使用した場合の問題

Question

Java Mail APIを使用してメールを送信する必要のあるこのサーブレットはありますが、パスワードは指定されていません。

MailServiceImpl.java：

public class MailServiceImpl extends RemoteServiceServlet implements MailService { 

    private static String HOST = "smtp.gmail.com"; 
    private static int PORT = 465; 
    private String username = "foo@gmail.com"; 
    private String password = "foo123"; 
    private Properties props = new Properties(); 

    @Override 
    public void sendMail(String email) { 
     props.put("mail.smtp.auth", "true"); 
     props.put("mail.smtp.starttls.enable", "true"); 

     props.put("mail.smtp.socketFactory.port", "465"); 
     props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
     props.put("mail.smtp.socketFactory.fallback", "false"); 

     Session session = Session.getInstance(props); 
     try { 
      Message message = new MimeMessage(session); 
      message.setFrom(new InternetAddress("foo@gmail.com")); 
      message.setRecipients(Message.RecipientType.TO, 
       InternetAddress.parse("foo@gmail.com")); 
      message.setSubject("Testing Subject"); 
      message.setText("Subcriber Email:," + 
        "\n\n " + email); 
      Transport transport = session.getTransport("smtp"); 
      transport.connect(HOST, PORT, username, password); 
      Transport.send(message);    
      transport.close(); // -- needed? 

     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 
} 

しかし、私はこのエラーを取得しています：

javax.mail.AuthenticationFailedException: failed to connect, no password specified? 
    at javax.mail.Service.connect(Service.java:329) 
    at javax.mail.Service.connect(Service.java:176) 
    at javax.mail.Service.connect(Service.java:125) 
    at javax.mail.Transport.send0(Transport.java:194) 
    at javax.mail.Transport.send(Transport.java:124) 
    at com.mygwtapp.server.MailServiceImpl.sendMail(MailServiceImpl.java:43) 

Answer 1

は、SSL接続を使用してみてください。それは私のために働いた。

Properties props = new Properties(); 
    props.put("mail.smtp.host", "smtp.gmail.com"); 
    props.put("mail.smtp.socketFactory.port", "465"); 
    props.put("mail.smtp.socketFactory.class", 
      "javax.net.ssl.SSLSocketFactory"); 
    props.put("mail.smtp.auth", "true"); 
    props.put("mail.smtp.port", "465"); 

    Session session = Session.getDefaultInstance(props, 
     new javax.mail.Authenticator() { 
      protected PasswordAuthentication getPasswordAuthentication() { 
       return new PasswordAuthentication("username","password"); 
      } 
     }); 

    try { 

     Message message = new MimeMessage(session); 
     message.setFrom(new InternetAddress("from@test.com")); 
     message.setRecipients(Message.RecipientType.TO, 
       InternetAddress.parse("to@test.com")); 
     message.setSubject("Testing Subject"); 
     message.setText("mail text"); 

     Transport.send(message); 

     System.out.println("OK"); 

    } catch (MessagingException e) { 
     throw new RuntimeException(e); 
    } 
}