A Java class for sending multipart Email messages through your Gmail account

Here is a Java class for sending multipart (text and file attachments) email messages through your Gmail account. This class is suitable for use in your JSF backing bean.

JavaMail library must be in your project. Get JavaMail here.



package your-package;

import javax.mail.PasswordAuthentication;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class Email {
    
    public void send(String recipeintEmail, 
            String subject, 
            String messageText, 
            String []attachments) 
            throws MessagingException, AddressException {
        /*
           It is a good practice to put this in a java.util.Properties 
           file and encrypt password. Scroll down 
           to comments below to see 
           how to use java.util.Properties in JSF context. 
        */
        String senderEmail = "your-gmail-account@gmail.com";
        String senderMailPassword = "sender-account-password";
        String gmail = "smtp.gmail.com";
        
        Properties props = System.getProperties();

        props.put("mail.smtp.user", senderEmail);
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.port", "465");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.debug", "true");
        props.put("mail.smtp.auth", "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");

        // Required to avoid security exception.
        MyAuthenticator authentication = 
              new MyAuthenticator(senderEmail,senderMailPassword);
        Session session = 
              Session.getDefaultInstance(props,authentication);
        session.setDebug(true);

        MimeMessage message = new MimeMessage(session);
        
        BodyPart messageBodyPart = new MimeBodyPart();      
        messageBodyPart.setText(messageText);
        
        // Add message text
        Multipart multipart = new MimeMultipart();
        multipart.addBodyPart(messageBodyPart);
        
        // Attachments should reside in your server.
        // Example "c:\file.txt" or "/home/user/photo.jpg"

        for (int i=0; i < attachments.length; i++) {        
            messageBodyPart = new MimeBodyPart();       
            DataSource source = new FileDataSource(attachments[i]);
            messageBodyPart.setDataHandler(new DataHandler(source));
            messageBodyPart.setFileName(attachments [i]);          
            multipart.addBodyPart(messageBodyPart) ;  
        }
        
   
           
        message.setContent(multipart);                
        message.setSubject(subject);
        message.setFrom(new InternetAddress(senderEmail));
        message.addRecipient(Message.RecipientType.TO,
            new InternetAddress(recipeintEmail));

        Transport transport = session.getTransport("smtps");
        transport.connect(gmail,465, senderEmail, senderMailPassword);
        transport.sendMessage(message, message.getAllRecipients());
        
        transport.close();
        
    }
    
    private class MyAuthenticator extends javax.mail.Authenticator {
        String User;
        String Password;
        public MyAuthenticator (String user, String password) {
            User = user;
            Password = password;
        }
        
        @Override
        public PasswordAuthentication getPasswordAuthentication() {
            return new javax.mail.PasswordAuthentication(User, Password);
        }
    }
    
}
  
  
  

Good luck.

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