salut

j'ai un application java qui envoyer un messsage a un client

voila le code

SendMailUsingAuthentication.java
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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import javax.mail.*;                                                                                                                
import javax.mail.internet.*;                                                                                                    
import java.util.*;                                                                                                                    
 
public class SendMailUsingAuthentication                                                                               
{                                                                                                                                            
  private static final String SMTP_HOST_NAME = "smtp.gmail.com";  // for google                
  private static final String SMTP_AUTH_USER = "user mail";             // Username                        
  private static final String SMTP_AUTH_PWD  = "password";          // Password                     
 
 
  // Add List of Email address to who email needs to be sent to                                               
  public void postMail( String recipients[ ], String subject,                                                       
                            String message , String from) throws MessagingException                          
  {                                                                                                                                         
    boolean debug = false;                                                                                                       
     //Set the host smtp address                                                                                               
     Properties props = new Properties();                                                                                
      props.put("mail.smtp.starttls.enable","true");                                                                     
     props.put("mail.smtp.host", SMTP_HOST_NAME);                                                        
     props.put("mail.smtp.auth", "true");                                                                                    
 
    Authenticator auth = new SMTPAuthenticator();                                                                
    Session session = Session.getDefaultInstance(props, auth);                                                 
 
    session.setDebug(debug);                                                                                                  
 
    // create a message                                                                                                            
    Message msg = new MimeMessage(session);                                                                    
 
    // set the from and to address                                                                                            
    InternetAddress addressFrom = new InternetAddress(from);                                             
    msg.setFrom(addressFrom);                                                                                             
 
    InternetAddress[] addressTo = new InternetAddress[recipients.length];                             
    for (int i = 0; i < recipients.length; i++)                                                                               
    {                                                                                                                                      
        addressTo[i] = new InternetAddress(recipients[i]);                                                        
    }                                                                                                                                      
    msg.setRecipients(Message.RecipientType.TO, addressTo);                                             
    // Setting the Subject and Content Type                                                                            
    msg.setSubject(subject);                                                                                                  
    msg.setContent(message, "text/plain");                                                                              
    Transport.send(msg);                                                                                                       
 }                                                                                                                                        
 
 
/**                                                                                                                                      
* SimpleAuthenticator is used to do simple authentication                                                     
* when the SMTP server requires it.                                                                                    
*/                                                                                                                                        
private class SMTPAuthenticator extends javax.mail.Authenticator                                        
{                                                                                                                                          
 
        @Override                                                                                                                   
    public PasswordAuthentication getPasswordAuthentication()                                             
    {                                                                                                                                      
        String username = SMTP_AUTH_USER;                                                                    
        String password = SMTP_AUTH_PWD;                                                                     
        return new PasswordAuthentication(username, password);                                             
    }                                                                                                                                       
} 
}
MainForm.java
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import java.util.logging.Level;
import java.util.logging.Logger;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
 
 
/**
 *
 * @author  KAI
 */
public class MainForm extends javax.swing.JFrame {
  private static  String emailMsgTxt      = "";
  private static  String emailSubjectTxt  = "";
  private static  String emailFromAddress = "";
 
  // Add List of Email address to who email needs to be sent to
  private static  String[] emailList = new String[10];
 
    /** Creates new form MainForm */
    public MainForm() {
        initComponents();
    }
public void postMail( String recipients[ ], String subject, String message , String from) throws MessagingException
{
    boolean debug = false;
 
     //Set the host smtp address
     Properties props = new Properties();
     props.put("mail.smtp.starttls.enable","true");
     props.put("mail.smtp.host", "smtp.gmail.com");
 
    // create some properties and get the default Session
    Session session = Session.getDefaultInstance(props, null);
    session.setDebug(debug);
 
    // create a message
    Message msg = new MimeMessage(session);
 
    // set the from and to address
    InternetAddress addressFrom = new InternetAddress(from);
    msg.setFrom(addressFrom);
 
    InternetAddress[] addressTo = new InternetAddress[recipients.length];
    for (int i = 0; i < recipients.length; i++)
    {
        addressTo[i] = new InternetAddress(recipients[i]);
    }
    msg.setRecipients(Message.RecipientType.TO, addressTo);
 
 
    // Optional : You can also set your custom headers in the Email if you Want
    msg.addHeader("MyHeaderName", "myHeaderValue");
 
    // Setting the Subject and Content Type
    msg.setSubject(subject);
    msg.setContent(message, "text/plain");
    Transport.send(msg);
}
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
 
        jPanel1 = new javax.swing.JPanel();
        jPanel2 = new javax.swing.JPanel();
        jButton1 = new javax.swing.JButton();
        jLabel1 = new javax.swing.JLabel();
        txto = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        txtsubject = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        txtfrom = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        jScrollPane1 = new javax.swing.JScrollPane();
        txtmessage = new javax.swing.JTextArea();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
 
        jPanel2.setBorder(javax.swing.BorderFactory.createEtchedBorder());
 
        jButton1.setText("send Mail");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
 
        jLabel1.setText("To");
 
        txto.setText("");
 
        jLabel2.setText("Subject");
 
        txtsubject.setText("");
 
        jLabel3.setText("From:");
 
        txtfrom.setEditable(false);
        txtfrom.setText("kanzari90@gmail.com");
 
        jLabel4.setText("Message:");
 
        txtmessage.setColumns(20);
        txtmessage.setRows(5);
        txtmessage.setText("");
        jScrollPane1.setViewportView(txtmessage);
 
        javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
        jPanel2.setLayout(jPanel2Layout);
        jPanel2Layout.setHorizontalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addContainerGap()
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                            .addComponent(jLabel2)
                            .addComponent(jLabel1)
                            .addComponent(jLabel3)
                            .addComponent(jLabel4))
                        .addGap(18, 18, 18)
                        .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(txtfrom, javax.swing.GroupLayout.DEFAULT_SIZE, 276, Short.MAX_VALUE)
                            .addComponent(txtsubject, javax.swing.GroupLayout.DEFAULT_SIZE, 276, Short.MAX_VALUE)
                            .addComponent(txto, javax.swing.GroupLayout.DEFAULT_SIZE, 276, Short.MAX_VALUE)
                            .addComponent(jScrollPane1)))
                    .addGroup(jPanel2Layout.createSequentialGroup()
                        .addGap(158, 158, 158)
                        .addComponent(jButton1)))
                .addContainerGap(40, Short.MAX_VALUE))
        );
        jPanel2Layout.setVerticalGroup(
            jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel2Layout.createSequentialGroup()
                .addGap(23, 23, 23)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(txto, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(txtsubject, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(txtfrom, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel4)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(jButton1)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
 
        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(39, 39, 39)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(28, 28, 28)
                .addComponent(jPanel2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(23, Short.MAX_VALUE))
        );
 
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
 
        pack();
    }// </editor-fold>
 
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
// TODO add your handling code here:
 
      emailMsgTxt      = txtmessage.getText();
     emailSubjectTxt  = txtsubject.getText();
emailFromAddress = txtfrom.getText();
 
  // Add List of Email address to who email needs to be sent to
StringBuffer sb=new StringBuffer(txto.getText());
StringTokenizer st=new StringTokenizer(txto.getText());
int i=0;
while(st.hasMoreTokens()){
    emailList[i]=st.nextToken(",");
    System.err.println(emailList[i]);
    i++;
}
 
  String emailReceipeint[]=new String[i];
  for(int j=0;j<i;j++){
  emailReceipeint[j]=emailList[j];
  System.out.println("Actually emails are "+j);
  }
 
 
 
    SendMailUsingAuthentication smtpMailSender = new SendMailUsingAuthentication();
        try {
            smtpMailSender.postMail(emailReceipeint, emailSubjectTxt, emailMsgTxt, emailFromAddress);
        } catch (MessagingException ex) {
            Logger.getLogger(MainForm.class.getName()).log(Level.SEVERE, null, ex);
        }
    System.out.println("Sucessfully Sent mail to All Users");
 
 
}                                        
 
    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new MainForm().setVisible(true);
            }
        });
    }
 
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextField txtfrom;
    private static javax.swing.JTextArea txtmessage;
    private static javax.swing.JTextField txto;
    private static javax.swing.JTextField txtsubject;
    // End of variables declaration
 
}

comment faire pour lorsque :
le client est voir le message , je reçois un message qui dit le client est ouvre le message.
mais lorsque le client ne voir pas le message l'application envoyer automatique un message dans 4 jours "Nous vous avons envoyé un message au cours des quatre derniers jours" .

S'il vous plaît aidez-moi j'ai besoin à la projet fin d'etude