envoyer email en java

**switch1** · 19/04/2009, 21h14

salut tout le monde je cherche a envoyer des emails via un code java :
j'ai telecharge la bibliothèque javamail et j'ai ajouter le .jar a mon projet

Code :

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package mail;
 
import javax.mail.*;
import javax.mail.internet.*;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
 
import java.util.Properties;
 
 
public class Envoi {
 
    private static final String SMTP_HOST_NAME = "smtp.mail.yahoo.fr";
    private static final String SMTP_AUTH_USER = "el_bahy.abdessamad";
    private static final String SMTP_AUTH_PWD  = "mon password";
 
    public static void main(String[] args) throws Exception{
       new Envoi().test();
    }
 
    public void test() throws Exception{
        Properties props = new Properties();
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.host", SMTP_HOST_NAME);
        props.put("mail.smtp.auth", "true");
 
        Authenticator auth = new SMTPAuthenticator();
        Session mailSession = Session.getDefaultInstance(props, auth);
        // uncomment for debugging infos to stdout
        // mailSession.setDebug(true);
        Transport transport = mailSession.getTransport();
 
        MimeMessage message = new MimeMessage(mailSession);
        message.setContent("This is a test", "text/plain");
        message.setFrom(new InternetAddress("me@myhost.org"));
        message.addRecipient(Message.RecipientType.TO,
             new InternetAddress("el_bahy.abdessamad@yahoo.fr"));
 
        transport.connect();
        transport.sendMessage(message,
            message.getRecipients(Message.RecipientType.TO));
        transport.close();
    }
 
    private class SMTPAuthenticator extends javax.mail.Authenticator {
        public PasswordAuthentication getPasswordAuthentication() {
           String username = SMTP_AUTH_USER;
           String password = SMTP_AUTH_PWD;
           return new PasswordAuthentication(username, password);
        }
    }
}

cependant j'ai une erreur :
Exception in thread "main" java.lang.NoClassDefFoundError: javax/activation/DataSource
at mail.Envoi.test(Envoi.java:33)
at mail.Envoi.main(Envoi.java:18)
Java Result: 1
c'est dans la ligne :
Message msg = new MimeMessage(session);

merci de m'aider