Envoyer un mail à partir d'un compte Gmail

Ceci est un exemple d'un code permettant d'envoyer un mail automatiquement à partir d'un compte Gmail avec un accusé de réception demandé à la lecture.

import java.util.Properties;

import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.AddressException;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

public class Main {

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

String host = "smtp.gmail.com";

String username = "mail emetteur";

String password = "password";

String port = "465";

String to = "mail destination"; // ou bien la liste des adresses de destination séparé par des virgules

String subject = "Test d'envoi automatique par Java";

String content = "Test d'envoi automatique de mail par Java en utilisant l'adresse: "+username;

InternetAddress fromAddress =null ;

InternetAddress[] addresses = null;

try {

addresses = InternetAddress.parse(to, true);

fromAddress= new InternetAddress(username);

} catch (AddressException e1) {

// TODO Auto-generated catch block

e1.printStackTrace();

}

Properties props = new Properties();

props.put("mail.smtp.host", host);

props.put("mail.smtp.user", username);

props.put("mail.smtp.port", port);

props.put("mail.smtp.starttls.enable","true");

props.put("mail.smtp.auth", "true");

props.put("mail.smtp.debug", "true");

props.put("mail.smtp.socketFactory.port", port);

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

props.put("mail.smtp.socketFactory.fallback", "false");

System.out.println("creating session");

Session session = Session.getDefaultInstance(props, null);

System.out.println("creating message");

MimeMessage message = new MimeMessage(session);

try {

message.setText(content);

message.setSubject(subject);

message.setFrom(fromAddress);

message.setRecipients(Message.RecipientType.TO,addresses);

message.setHeader("Disposition-Notification-To",fromAddress.getAddress());

System.out.println("creating transport");

Transport transport = session.getTransport("smtp");

System.out.println("connecting to "+host+" with username = "+username);

transport.connect(host, username, password);

System.out.println("sending message");

transport.sendMessage(message, message.getAllRecipients());

transport.close();

System.out.println("transport closed");

} catch (MessagingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}