gistfile1.java

import java.util.*;
import java.io.*;

import javax.mail.*;
import javax.mail.internet.*;
import javax.activation.*;

public class Mailer {

    public static void main(String[] args) throws IOException {
	

	String to = "sebastien.creme@gmail.com";
	String from = "toto@toto.com";
	
	String msgText1 = "Sending a file.\n";
	String subject = "Sending a file";
	
	// create some properties and get the default Session
	Properties props = System.getProperties();
	props.put("mail.smtp.host", "smtp.gmail.com");
	props.put("mail.smtp.starttls.enable","true");
	props.put("mail.smtp.auth", "true");
	
	//FIRST PROBLEM :: Authentification
    class SMTPAuthenticator extends javax.mail.Authenticator {
		 
		public PasswordAuthentication getPasswordAuthentication() {
			String username = "scr@zenexity.fr";
			String password = "demotest";
			return new PasswordAuthentication(username, password);
		}
	}
	 
    Authenticator auth = new SMTPAuthenticator();
	
	Session session = Session.getInstance(props, auth);
	try {
	    // create a message
	    MimeMessage msg = new MimeMessage(session);
	    //msg.setFrom(new InternetAddress(from));
	    InternetAddress[] address = {new InternetAddress(to)};
	    msg.setRecipients(Message.RecipientType.TO, address);
	    msg.setSubject(subject);
	    // create and fill the first message part
	    MimeBodyPart mbp1 = new MimeBodyPart();
	    mbp1.setText(msgText1);
	   
	    
	    //SECOND :: send file
	   

	    // create the second message part
	    MimeBodyPart mbp2 = new MimeBodyPart();
	    File file = new File("test.txt");
	    System.out.println("exists : "+file.exists());
	    // attach the file to the message
	    mbp2.attachFile("test.txt");
	    
	    
	    FileDataSource fds = new FileDataSource(new File("test.txt")) {
		public String getContentType() {
		    return "application/octet-stream";
		}
	    };
	    mbp2.setDataHandler(new DataHandler(fds));
	    mbp2.setFileName(fds.getName());
	    

	    // create the Multipart and add its parts to it
	    Multipart mp = new MimeMultipart();
	    mp.addBodyPart(mbp1);
	    mp.addBodyPart(mbp2);
	    mp.addBodyPart(mbp1);
	    
	    // add the Multipart to the message
	    msg.setContent(mp);

	    // set the Date: header
	    msg.setSentDate(new Date());

	   
	    msg.saveChanges();
	    mbp2.setHeader("Content-Transfer-Encoding", "base64");
	     

	    // send the message
	    Transport.send(msg);
	    
	    
	    
	} catch (MessagingException mex) {
	    mex.printStackTrace();
	    Exception ex = null;
	    if ((ex = mex.getNextException()) != null) {
		ex.printStackTrace();
	    }
	
	}
}
}