Le fonctionnement de JProgressBar

Bonjour,

J'ai le programme suivant :

Code:

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package migration;   import java.io.File; import java.io.FileWriter; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.Statement; import javax.swing.DefaultListModel; import javax.swing.SwingUtilities; import javax.swing.text.html.parser.DTDConstants; import org.json.simple.JSONObject;   public class Generer_JSON extends javax.swing.JFrame {   /**      * Creates new form Generer_JSON      */ public Generer_JSON() { initComponents(); }   /**      * 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() {   jScrollPane1 = new javax.swing.JScrollPane(); jList1 = new javax.swing.JList(); jScrollPane2 = new javax.swing.JScrollPane(); jList2 = new javax.swing.JList(); jButton1 = new javax.swing.JButton(); jButton2 = new javax.swing.JButton(); jScrollPane3 = new javax.swing.JScrollPane(); jTextArea1 = new javax.swing.JTextArea(); jProgressBar1 = new javax.swing.JProgressBar();   setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);   jList1.setModel(new javax.swing.AbstractListModel() { String[] strings = { "User", "Message", "Commune", "Adress", "Statut", "Commenter_statut", "Aimer_Statut", "Image", "Album", "Composer", "Aimer_Image", "Commenter_Image", "Groupe", "Adherer", "Message", "Evenement", "Inviter", "Participer", "Etre_Amie" }; public int getSize() { return strings.length; } public Object getElementAt(int i) { return strings[i]; } }); jScrollPane1.setViewportView(jList1);   jScrollPane2.setViewportView(jList2);   jButton1.setText("Selectionner"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } });   jButton2.setText("Generer_les_ficher_JSON"); jButton2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton2ActionPerformed(evt); } });   jTextArea1.setColumns(20); jTextArea1.setRows(5); jScrollPane3.setViewportView(jTextArea1);   javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(24, 24, 24) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 140, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(101, 101, 101) .addComponent(jButton1) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 140, Short.MAX_VALUE) .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 150, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(22, 22, 22)) .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(81, 81, 81) .addComponent(jButton2)) .addGroup(layout.createSequentialGroup() .addGap(8, 8, 8) .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 356, javax.swing.GroupLayout.PREFERRED_SIZE))) .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))) .addGroup(layout.createSequentialGroup() .addComponent(jScrollPane3) .addContainerGap()))) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addGroup(layout.createSequentialGroup() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 209, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(layout.createSequentialGroup() .addGap(12, 12, 12) .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 196, javax.swing.GroupLayout.PREFERRED_SIZE))) .addGap(18, 18, 18)) .addGroup(layout.createSequentialGroup() .addGap(64, 64, 64) .addComponent(jButton1) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 73, Short.MAX_VALUE) .addComponent(jButton2) .addGap(55, 55, 55))) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 54, Short.MAX_VALUE) .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(74, 74, 74) .addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 202, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap()) );   pack(); }// </editor-fold>   private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: jList1.getSelectionModel().addListSelectionListener(null); DefaultListModel<String> model=new DefaultListModel<>(); for(Object selected :jList1.getSelectedValuesList()) { model.addElement((String) selected); // System.out.println( model.contains("users"));   } jList2.setModel(model); }   private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) { try{   Connection connect = DriverManager.getConnection("jdbc:mysql://localhost:3306/reseau_social","root","root");//?user=root&password=root\""); System.out.println("connexion à la base de données réussie "); Statement stmt = connect.createStatement();   Task task = new Task(); task.start();{ DefaultListModel<String> model=new DefaultListModel<>(); for(Object selected :jList1.getSelectedValuesList()) { model.addElement((String) selected); }   if(model.contains("User")){ ResultSet rs1 = stmt.executeQuery( "select * from user " ) ; ResultSetMetaData resultMeta = rs1.getMetaData(); JSONObject obj = new JSONObject(); File file1 =new File ("C:\\Users\\help\\Desktop\\users.json") ; file1.createNewFile(); FileWriter writer =new FileWriter(file1);   while(rs1.next()){ obj.put("id_user", rs1.getObject(1).toString()) ; obj.put("nom", rs1.getObject(2).toString()); obj.put("prenom", rs1.getObject(3).toString()) ; obj.put("email", rs1.getObject(4).toString()); obj.put("mot_de_pass", rs1.getObject(5).toString()) ; obj.put("id_commune", rs1.getObject(6).toString());   Object jsoncontent = obj; System.out.println("le"+jsoncontent); jTextArea1.append(jsoncontent.toString()+"\n"); writer.write(jsoncontent.toString()+"\n"); writer.flush(); } rs1.close(); }     /**************************************commune*****************************************/   if(model.contains("Commune")){ JSONObject obj2 = new JSONObject(); ResultSet rs2 = stmt.executeQuery( "select * from commune " ) ; ResultSetMetaData resultMeta3 = rs2.getMetaData();   File file2 =new File ("C:\\Users\\help\\Desktop\\commune.json") ; file2.createNewFile(); FileWriter writer2 =new FileWriter(file2); while(rs2.next()) { obj2.put("id_commune", rs2.getObject(1).toString()) ; // for(int i = 1; i <= resultMeta.getColumnCount(); i++){ obj2.put("nom_commune", rs2.getObject(2).toString()); obj2.put("id_adress", rs2.getObject(3).toString()); Object jsoncontent2 = obj2; System.out.println("le"+jsoncontent2);   writer2.write(jsoncontent2.toString()+"\n"); writer2.flush(); jTextArea1.append(jsoncontent2.toString()+"\n"); } rs2.close(); }     //////////////////////******************adress****************************///////////     if(model.contains("Adress")){ JSONObject obj1 = new JSONObject(); ResultSet rs2 = stmt.executeQuery( "select * from adress " ) ; ResultSetMetaData resultMeta2 = rs2.getMetaData(); File file1 =new File ("C:\\Users\\help\\Desktop\\adress.json") ; file1.createNewFile(); FileWriter writer1 =new FileWriter(file1); while(rs2.next()) { obj1.put("id_adress", rs2.getObject(1).toString()) ; // for(int i = 1; i <= resultMeta.getColumnCount(); i++){ obj1.put("nom_adress", rs2.getObject(2).toString()); Object jsoncontent1 = obj1; System.out.println("le"+jsoncontent1); jTextArea1.append(jsoncontent1.toString()+"\n"); writer1.write(jsoncontent1.toString()+"\n"); writer1.flush(); } rs2.close(); // writer.close(); }     //////////////////////***************etre_amie*************************************************************/   if(model.contains("Etre_Amie")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from etre_amie " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\etre_amie.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_user", rs4.getObject(1).toString()) ; // for(int i = 1; i <= resultMeta.getColumnCount(); i++){ obj4.put("id_user_1", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }       /***************************statut************************************************/ if(model.contains("Statut")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from statu " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\statut.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_statu", rs4.getObject(1).toString()) ; // for(int i = 1; i <= resultMeta.getColumnCount(); i++){ obj4.put("id_user", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }   /*****************************************commenter le statut***************************************************/ if(model.contains("Commenter_statut")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from commenter_statu " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\cmnt_statu.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_statu", rs4.getObject(1).toString()) ; obj4.put("commentaire", rs4.getObject(2).toString()) ; obj4.put("id_user", rs4.getObject(3).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }     /******************************     Aimer un statu         ***********************************/// if(model.contains("Aimer_Statut")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from aimer_statu " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\aime_statu.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_statu", rs4.getObject(1).toString()) ;   obj4.put("id_user", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }     /*******************************         image                *************************************************************/ if(model.contains("Image")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from image " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\image.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_image", rs4.getObject(1).toString()) ; obj4.put("type_image", rs4.getObject(2).toString()) ; Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }   /****************************************Album *************************************************************************/   if(model.contains("Album")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from album " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\album.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_album", rs4.getObject(1).toString()) ; obj4.put("id_user", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }   /*************************composer*********************************************************/ if(model.contains("Composer")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from composer " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\composer.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_album", rs4.getObject(1).toString()) ; obj4.put("id_user", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }       /*************************************************aimer image**********************************************************/ if(model.contains("Aimer_Image")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from aimer_image " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\aime_image.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_user", rs4.getObject(1).toString()) ;   obj4.put("id_image", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); } /**********************************COMMENTER IMAGE*****************************************************************/ if(model.contains("Commenter_Image")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from commenter_image " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\aime_image.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_user", rs4.getObject(1).toString()) ;   obj4.put("id_image", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }   /************************************ groupe***********************************************************************/ if(model.contains("Groupe")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from groupe " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\groupe.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_groupe", rs4.getObject(1).toString()) ; obj4.put("id_user", rs4.getObject(2).toString()) ;   obj4.put("id_image", rs4.getObject(3).toString()); Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }   /**************************************adherer *************************************************/ if(model.contains("Adherer")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from adherer " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\adherer.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_user", rs4.getObject(1).toString()) ; obj4.put("id_groupe", rs4.getObject(2).toString()) ;   Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }   /////////*****************************************************message***************************************/ if(model.contains("Message")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from message " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\message.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_message", rs4.getObject(1).toString()) ; obj4.put("contenu", rs4.getObject(2).toString()); obj4.put("id_user", rs4.getObject(3).toString()) ; obj4.put("id_user_1", rs4.getObject(4).toString()) ;   Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }     /****************************evenement***********************************/ if(model.contains("Evenement")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from evenement " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\evenement.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_evenement", rs4.getObject(1)); obj4.put("id_commune", rs4.getObject(2)); obj4.put("id_user", rs4.getObject(3).toString()) ;     Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); }   /*****************************inviter******************************************/ if(model.contains("Inviter")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from inviter " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\inviter.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_evenement", rs4.getObject(1));   obj4.put("id_user", rs4.getObject(2).toString()) ;     Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); } /*************************************** participer*********************************/ if(model.contains("Participer")){ JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery( "select * from participer " ); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 =new File ("C:\\Users\\help\\Desktop\\participer.json") ; file4.createNewFile(); FileWriter writer4 =new FileWriter(file4); while(rs4.next()) { obj4.put("id_evenement", rs4.getObject(1));   obj4.put("id_user", rs4.getObject(2).toString()) ;     Object jsoncontent4 = obj4; System.out.println("le"+jsoncontent4); jTextArea1.append(jsoncontent4.toString()+"\n"); writer4.write(jsoncontent4.toString()+"\n"); writer4.flush(); } rs4.close(); } }     }catch (Exception e){}   } private class Task extends Thread { public Task(){ }   public void run(){ jProgressBar1.setVisible(true);     for(int i =0; i<= 100; i+=1){ final int progress = i; SwingUtilities.invokeLater(new Runnable() { public void run() { jProgressBar1.setValue(progress); // outputTextArea.setText(outputTextArea.getText() // + String.format("Completed %d%% of task.\n", progress)); } }); try { Thread.sleep(900); } catch (InterruptedException e) {} } }} private void jProgressBar1PropertyChange(java.beans.PropertyChangeEvent evt) {   jProgressBar1.setVisible(false); } /**      * @param args the command line arguments      */ public static void main(String args[]) { /* Set the Nimbus look and feel */ //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) "> /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.   * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html   */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(Generer_JSON.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(Generer_JSON.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(Generer_JSON.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(Generer_JSON.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } //</editor-fold>   /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new Generer_JSON().setVisible(true); } }); }   // Variables declaration - do not modify private javax.swing.JButton jButton1; private javax.swing.JButton jButton2; private javax.swing.JList jList1; private javax.swing.JList jList2; private javax.swing.JProgressBar jProgressBar1; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JScrollPane jScrollPane2; private javax.swing.JScrollPane jScrollPane3; private javax.swing.JTextArea jTextArea1; // End of variables declaration }

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et lors de la création des fichiers, le temps d'exécution est un peu long. J'ai donc décidé de faire un JProgressBar mais il ne fonctionne pas correctement.

Quelqu'un saurait-il me guider un peu ?

Merci d'avance pour votre aide.

Salut,

Tu pourrais préciser "pas correctement" ?

Là, à priori, la progressbar fonctionne exactement comme tu lui demande de fonctionner : elle progresse de 0 à 100, à raison de 1 toutes les 900 ms. Elle est donc complètement décorélée de ton process, qui peut prendre moins de 90 secondes, ou plus peut-être, en tout cas rarement 90 secondes.
Ensuite le process que tu fais, le process long comme tu dis, est fait sur événement d'UI (actionPerformed) : il s'exécute donc dans le thread de SWING, le même qui est utilisé pour mettre à jour l'affichage de tout ce qui graphique, donc y compris la progressbar. Donc la valeur de progression progresse bien de 0 à 100 en 90 secondes, mais l'affichage correspondant de la progressbar ne se fait que quand le thread graphique le permet, donc à la fin du process long, quand il rend la main sur le thread (SWING) dans lequel il s'exécute.

Ce n'est pas du tout comme ça qu'il faut gérer ça :

• le process long doit être fait dans un thread différent du thread SWING
• ce même thread doit faire progresser la valeur de progression (soit selon la progression des étapes que fait ton process long, soit selon une estimation du temps, soit en mode indéterminé)
• on demande au thread graphique de se rafraichir pour qu'on voit la progression dans la progressbar, à chaque fois qu'on modifie la valeur de progression
• à la fin du process long, on met éventuellement à jour l'affichage correspondant

Pour t'aider à faire ce genre de chose, il y a une classe Java : SwingWorker.

• Tutoriel Developpez
• Tutoriel Oracle
• Tutoriel Oracle avec un exemple de swingworker pour faire une progressbar (ProgressBarDemo)

Merci de votre reponse , donc je doit creer maintenant un autre thread qui fait le mon traitement qui est long

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Envoyé par benmia

Merci de votre reponse , donc je doit creer maintenant un autre thread qui fait le mon traitement qui est long

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Oui, ou utilise un SwingWorker qui s'occupera de ce thread.

D'autre part, je ne comprends pas pourquoi tu ne traites pas tous tes objets dans une boucle : ça serait bien plus simple, éviterait de la duplication de code, et ça te permettrait de gérer plus facilement la progression réelle. A quoi sert model dans jButton2ActionPerformed ? Tu te compliques bien la vie.

Comme ça par exemple

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public class Task extends SwingWorker<Object, JSONObject> {   private final static String PATH = "C:/Users/help/Desktop/";   private final String[] values;   private final JTextArea jtextArea;   public Task(String[] values, JTextArea jtextArea) { this.values=values; this.jtextArea=jtextArea; }   @Override protected Object doInBackground() throws Exception {   int progression = 0;   try( Connection connect = DriverManager.getConnection("jdbc:mysql://localhost:3306/reseau_social","root","root") ) { Statement stmt = connect.createStatement();   for(String value : values) {   createJSon(value, getTableName(value.toLowerCase()), getFileName(value.toLowerCase()), stmt); setProgress(++progression); // par exemple, pour une progression par objet   }   }   return null; }       private String getTableName(String value) { return value; /* ou si tu as besoin d'avoir des noms différents   String tableName; switch(value) { case "user": tableName = "user"; break; case "adress": tableName = "adress"; break; // JE TE LAISSE COMPLETER default: throw new IllegalStateException(); } return tableName;*/ }   private String getFileName(String value) { //return value + ".json" String filename; switch(value) { case "user": filename = "users"; break; case "adress": filename = "adress"; break; // JE TE LAISSE COMPLETER default: throw new IllegalStateException(); } return filename + ".json"; }   private void createJSon(String value, String tableName, String fileName, Statement stmt) throws SQLException, IOException { try(ResultSet rs1 = stmt.executeQuery( "select * from " + tableName )) { ResultSetMetaData resultMeta = rs1.getMetaData();   try( BufferedWriter writer = Files.newBufferedWriter(Paths.get(PATH, fileName)) ) {   while(rs1.next()){ JSONObject json = new JSONObject(); for(int i=1; i<=resultMeta.getColumnCount(); i++) { String columnName = resultMeta.getColumnName(i); json.put(columnName, rs1.getObject(i).toString()) ; } writer.write(json.toString()); writer.write(System.lineSeparator()); publish(json); }   }   }   }   protected void process(java.util.List<JSONObject> chunks) {   for(JSONObject json : chunks) { jtextArea.append(json.toString()+"\n"); }   }   }

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private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) { // il faut que tu déclares jList1 ne JList<String> Task task = new Task(jList1.getSelectedValuesList(), jTextArea1);   task..addPropertyChangeListener(evt-> { if ("progress".equals(evt.getPropertyName())) { int progress = (Integer) evt.getNewValue(); progressBar.setValue(progress); } });   task.execute(); }

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Envoyé par joel.drigo

Oui, ou utilise un SwingWorker qui s'occupera de ce thread.

D'autre part, je ne comprends pas pourquoi tu ne traites pas tous tes objets dans une boucle : ça serait bien plus simple, éviterait de la duplication de code, et ça te permettrait de gérer plus facilement la progression réelle. A quoi sert model dans jButton2ActionPerformed ? Tu te compliques bien la vie.

Comme ça par exemple

Code:

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public class Task extends SwingWorker<Object, JSONObject> {   private final static String PATH = "C:/Users/help/Desktop/";   private final String[] values;   private final JTextArea jtextArea;   public Task(String[] values, JTextArea jtextArea) { this.values=values; this.jtextArea=jtextArea; }   @Override protected Object doInBackground() throws Exception {   int progression = 0;   try( Connection connect = DriverManager.getConnection("jdbc:mysql://localhost:3306/reseau_social","root","root") ) { Statement stmt = connect.createStatement();   for(String value : values) {   createJSon(value, getTableName(value.toLowerCase()), getFileName(value.toLowerCase()), stmt); setProgress(++progression); // par exemple, pour une progression par objet   }   }   return null; }       private String getTableName(String value) { return value; /* ou si tu as besoin d'avoir des noms différents   String tableName; switch(value) { case "user": tableName = "user"; break; case "adress": tableName = "adress"; break; // JE TE LAISSE COMPLETER default: throw new IllegalStateException(); } return tableName;*/ }   private String getFileName(String value) { //return value + ".json" String filename; switch(value) { case "user": filename = "users"; break; case "adress": filename = "adress"; break; // JE TE LAISSE COMPLETER default: throw new IllegalStateException(); } return filename + ".json"; }   private void createJSon(String value, String tableName, String fileName, Statement stmt) throws SQLException, IOException { try(ResultSet rs1 = stmt.executeQuery( "select * from " + tableName )) { ResultSetMetaData resultMeta = rs1.getMetaData();   try( BufferedWriter writer = Files.newBufferedWriter(Paths.get(PATH, fileName)) ) {   while(rs1.next()){ JSONObject json = new JSONObject(); for(int i=1; i<=resultMeta.getColumnCount(); i++) { String columnName = resultMeta.getColumnName(i); json.put(columnName, rs1.getObject(i).toString()) ; } writer.write(json.toString()); writer.write(System.lineSeparator()); publish(json); }   }   }   }   protected void process(java.util.List<JSONObject> chunks) {   for(JSONObject json : chunks) { jtextArea.append(json.toString()+"\n"); }   }   }

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private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) { // il faut que tu déclares jList1 ne JList<String> Task task = new Task(jList1.getSelectedValuesList(), jTextArea1);   task..addPropertyChangeListener(evt-> { if ("progress".equals(evt.getPropertyName())) { int progress = (Integer) evt.getNewValue(); progressBar.setValue(progress); } });   task.execute(); }

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le code il genere une erreurPièce jointe 171977

1) il y'a une faute de frappe : task..addPropertyChangeListener(. Il ne faut bien sûr qu'un seul point là.
2) Tu serais pas (encore) sous Java 7 ?

meme lorsque j'ai enleve le point le meme pb

Citation:

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Envoyé par joel.drigo

2) Tu serais pas (encore) sous Java 7 ?

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oui je serait pas sous java7

Citation:

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Envoyé par benmia

oui je serait pas sous java7

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Dans ce cas :

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task.addPropertyChangeListener(new PropertyChangeListener() {   public void propertyChange(PropertyChangeEvent evt) { if ("progress".equals(evt.getPropertyName())) { int progress = (Integer) evt.getNewValue(); jProgressBar1.setValue(progress); } }   });

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Vraiment je deviens folle avec ce programme : toujours des erreurs Pièce jointe 171985

Si je ne sais pas quelles erreurs et comme je ne peux pas voir à distance, je ne vais pas pouvoir t'aider...
[EDIT]Dans le source que tu joins en pièce jointe, tu as collé mon code n'importe où, tu en as commenté une partie, supprimé une autre... il y avait une erreur sur le type de la sélection un Object[] au lieu d'un String[] (mais même avec ça, ça n'aurait pas fonctionner parce que tu n'avais pas suivi toutes les indications données)...
en plus quand on copie/colle un programme, on le lit (j'y ai laissé des commentaires pour toi dedans) : heureusement que j'y ai pas mis quelque chose pour supprimer des fichiers de ton disque dur...

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public class Generer_JSON extends javax.swing.JFrame {   /**          * Creates new form Generer_JSON          */ public Generer_JSON() { initComponents(); }   /**          * 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">//GEN-BEGIN:initComponents private void initComponents() {   jScrollPane1 = new javax.swing.JScrollPane(); jList1 = new javax.swing.JList<>(); jScrollPane2 = new javax.swing.JScrollPane(); jList2 = new javax.swing.JList<>(); jButton1 = new javax.swing.JButton(); jButton2 = new javax.swing.JButton(); jScrollPane3 = new javax.swing.JScrollPane(); jTextArea1 = new javax.swing.JTextArea(); jProgressBar1 = new javax.swing.JProgressBar(); jButton3 = new javax.swing.JButton();   setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);   jList1.setModel(new javax.swing.AbstractListModel<String>() { String[] strings = { "User", "Message", "Commune", "Adress", "Statut", "Commenter_statut", "Aimer_Statut", "Image", "Album", "Composer", "Aimer_Image", "Commenter_Image", "Groupe", "Adherer", "Message", "Evenement", "Inviter", "Participer", "Etre_Amie" };   public int getSize() { return strings.length; }   public String getElementAt(int i) { return strings[i]; } }); jScrollPane1.setViewportView(jList1);   jScrollPane2.setViewportView(jList2);   jButton1.setText("Selectionner"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } });   jButton2.setText("Generer_les_ficher_JSON"); jButton2.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton2ActionPerformed(evt); } });   jTextArea1.setColumns(20); jTextArea1.setRows(5); jScrollPane3.setViewportView(jTextArea1);   jButton3.setText("jButton3"); jButton3.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton3ActionPerformed(evt); } });   javax.swing.GroupLayout layout = new javax.swing.GroupLayout( getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup( layout.createSequentialGroup() .addGap(24, 24, 24) .addGroup( layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING) .addGroup( javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addComponent( jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 140, javax.swing.GroupLayout.PREFERRED_SIZE) .addGroup( layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING) .addGroup( layout.createSequentialGroup() .addGap(101, 101, 101) .addComponent( jButton1) .addPreferredGap( javax.swing.LayoutStyle.ComponentPlacement.RELATED, 140, Short.MAX_VALUE) .addComponent( jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 150, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(22, 22, 22)) .addGroup( layout.createSequentialGroup() .addGroup( layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING) .addGroup( layout.createSequentialGroup() .addGap(81, 81, 81) .addComponent( jButton2)) .addGroup( layout.createSequentialGroup() .addGap(8, 8, 8) .addComponent( jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, 356, javax.swing.GroupLayout.PREFERRED_SIZE))) .addContainerGap( javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))) .addGroup( layout.createSequentialGroup() .addComponent( jScrollPane3) .addContainerGap()))) .addGroup( javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addContainerGap( javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE).addComponent(jButton3) .addGap(281, 281, 281))); layout.setVerticalGroup(layout .createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup( layout.createSequentialGroup() .addGroup( layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING, false) .addGroup( layout.createSequentialGroup() .addGroup( layout.createParallelGroup( javax.swing.GroupLayout.Alignment.LEADING) .addGroup( layout.createSequentialGroup() .addContainerGap() .addComponent( jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 209, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup( layout.createSequentialGroup() .addGap(12, 12, 12) .addComponent( jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 196, javax.swing.GroupLayout.PREFERRED_SIZE))) .addGap(18, 18, 18)) .addGroup( layout.createSequentialGroup() .addGap(64, 64, 64) .addComponent( jButton1) .addPreferredGap( javax.swing.LayoutStyle.ComponentPlacement.RELATED, 73, Short.MAX_VALUE) .addComponent( jButton2) .addGap(55, 55, 55))) .addPreferredGap( javax.swing.LayoutStyle.ComponentPlacement.RELATED, 5, Short.MAX_VALUE) .addComponent(jButton3) .addGap(26, 26, 26) .addComponent(jProgressBar1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(74, 74, 74) .addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 202, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap()));   pack(); }// </editor-fold>//GEN-END:initComponents   private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {// GEN-FIRST:event_jButton1ActionPerformed // TODO add your handling code here: jList1.getSelectionModel().addListSelectionListener(null); DefaultListModel<String> model = new DefaultListModel<>(); for (String selected : jList1.getSelectedValuesList()) { model.addElement(selected); // System.out.println( model.contains("users"));   } jList2.setModel(model); }// GEN-LAST:event_jButton1ActionPerformed   private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {// GEN-FIRST:event_jButton2ActionPerformed try {   Connection connect = DriverManager .getConnection("jdbc:mysql://localhost:3306/reseau_social", "root", "root");// ?user=root&password=root\""); System.out.println("connexion à la base de données réussie "); Statement stmt = connect.createStatement();   // Task task = new Task(); // task.start();{ DefaultListModel<String> model = new DefaultListModel<>(); for (Object selected : jList1.getSelectedValuesList()) { model.addElement((String) selected); }   if (model.contains("User")) { ResultSet rs1 = stmt.executeQuery("select * from user "); ResultSetMetaData resultMeta = rs1.getMetaData(); JSONObject obj = new JSONObject(); File file1 = new File("C:\\Users\\help\\Desktop\\users.json"); file1.createNewFile(); FileWriter writer = new FileWriter(file1);   while (rs1.next()) { obj.put("id_user", rs1.getObject(1).toString()); obj.put("nom", rs1.getObject(2).toString()); obj.put("prenom", rs1.getObject(3).toString()); obj.put("email", rs1.getObject(4).toString()); obj.put("mot_de_pass", rs1.getObject(5).toString()); obj.put("id_commune", rs1.getObject(6).toString());   Object jsoncontent = obj; System.out.println("le" + jsoncontent); jTextArea1.append(jsoncontent.toString() + "\n"); writer.write(jsoncontent.toString() + "\n"); writer.flush(); } rs1.close(); }   /************************************** commune *****************************************/   if (model.contains("Commune")) { JSONObject obj2 = new JSONObject(); ResultSet rs2 = stmt.executeQuery("select * from commune "); ResultSetMetaData resultMeta3 = rs2.getMetaData();   File file2 = new File("C:\\Users\\help\\Desktop\\commune.json"); file2.createNewFile(); FileWriter writer2 = new FileWriter(file2); while (rs2.next()) { obj2.put("id_commune", rs2.getObject(1).toString()); // for(int // i // = // 1; // i // <= // resultMeta.getColumnCount(); // i++){ obj2.put("nom_commune", rs2.getObject(2).toString()); obj2.put("id_adress", rs2.getObject(3).toString()); Object jsoncontent2 = obj2; System.out.println("le" + jsoncontent2);   writer2.write(jsoncontent2.toString() + "\n"); writer2.flush(); jTextArea1.append(jsoncontent2.toString() + "\n"); } rs2.close(); }   // ////////////////////******************adress****************************///////////   if (model.contains("Adress")) { JSONObject obj1 = new JSONObject(); ResultSet rs2 = stmt.executeQuery("select * from adress "); ResultSetMetaData resultMeta2 = rs2.getMetaData(); File file1 = new File("C:\\Users\\help\\Desktop\\adress.json"); file1.createNewFile(); FileWriter writer1 = new FileWriter(file1); while (rs2.next()) { obj1.put("id_adress", rs2.getObject(1).toString()); // for(int // i = // 1; i // <= // resultMeta.getColumnCount(); // i++){ obj1.put("nom_adress", rs2.getObject(2).toString()); Object jsoncontent1 = obj1; System.out.println("le" + jsoncontent1); jTextArea1.append(jsoncontent1.toString() + "\n"); writer1.write(jsoncontent1.toString() + "\n"); writer1.flush(); } rs2.close(); // writer.close(); }   // ////////////////////***************etre_amie*************************************************************/   if (model.contains("Etre_Amie")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from etre_amie "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File( "C:\\Users\\help\\Desktop\\etre_amie.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_user", rs4.getObject(1).toString()); // for(int // i = // 1; i // <= // resultMeta.getColumnCount(); // i++){ obj4.put("id_user_1", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString()); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /*************************** statut ************************************************/ if (model.contains("Statut")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from statu "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File("C:\\Users\\help\\Desktop\\statut.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_statu", rs4.getObject(1).toString()); // for(int // i = // 1; i // <= // resultMeta.getColumnCount(); // i++){ obj4.put("id_user", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString()); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /***************************************** commenter le statut ***************************************************/ if (model.contains("Commenter_statut")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt .executeQuery("select * from commenter_statu "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File( "C:\\Users\\help\\Desktop\\cmnt_statu.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_statu", rs4.getObject(1).toString()); obj4.put("commentaire", rs4.getObject(2).toString()); obj4.put("id_user", rs4.getObject(3).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /****************************** Aimer un statu ***********************************/ // if (model.contains("Aimer_Statut")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from aimer_statu "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File( "C:\\Users\\help\\Desktop\\aime_statu.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_statu", rs4.getObject(1).toString());   obj4.put("id_user", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /******************************* image *************************************************************/ if (model.contains("Image")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from image "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File("C:\\Users\\help\\Desktop\\image.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_image", rs4.getObject(1).toString()); obj4.put("type_image", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /**************************************** Album *************************************************************************/   if (model.contains("Album")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from album "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File("C:\\Users\\help\\Desktop\\album.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_album", rs4.getObject(1).toString()); obj4.put("id_user", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /************************* composer *********************************************************/ if (model.contains("Composer")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from composer "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File("C:\\Users\\help\\Desktop\\composer.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_album", rs4.getObject(1).toString()); obj4.put("id_user", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /************************************************* aimer image **********************************************************/ if (model.contains("Aimer_Image")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from aimer_image "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File( "C:\\Users\\help\\Desktop\\aime_image.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_user", rs4.getObject(1).toString());   obj4.put("id_image", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); } /********************************** COMMENTER IMAGE *****************************************************************/ if (model.contains("Commenter_Image")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt .executeQuery("select * from commenter_image "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File( "C:\\Users\\help\\Desktop\\aime_image.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_user", rs4.getObject(1).toString());   obj4.put("id_image", rs4.getObject(2).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /************************************ groupe ***********************************************************************/ if (model.contains("Groupe")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from groupe "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File("C:\\Users\\help\\Desktop\\groupe.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_groupe", rs4.getObject(1).toString()); obj4.put("id_user", rs4.getObject(2).toString());   obj4.put("id_image", rs4.getObject(3).toString()); Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /************************************** adherer *************************************************/ if (model.contains("Adherer")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from adherer "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File("C:\\Users\\help\\Desktop\\adherer.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_user", rs4.getObject(1).toString()); obj4.put("id_groupe", rs4.getObject(2).toString());   Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   // ///////*****************************************************message***************************************/ if (model.contains("Message")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from message "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File("C:\\Users\\help\\Desktop\\message.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_message", rs4.getObject(1).toString()); obj4.put("contenu", rs4.getObject(2).toString()); obj4.put("id_user", rs4.getObject(3).toString()); obj4.put("id_user_1", rs4.getObject(4).toString());   Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /**************************** evenement ***********************************/ if (model.contains("Evenement")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from evenement "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File( "C:\\Users\\help\\Desktop\\evenement.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_evenement", rs4.getObject(1)); obj4.put("id_commune", rs4.getObject(2)); obj4.put("id_user", rs4.getObject(3).toString());   Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   /***************************** inviter ******************************************/ if (model.contains("Inviter")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from inviter "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File("C:\\Users\\help\\Desktop\\inviter.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_evenement", rs4.getObject(1));   obj4.put("id_user", rs4.getObject(2).toString());   Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); } /*************************************** participer *********************************/ if (model.contains("Participer")) { JSONObject obj4 = new JSONObject();   ResultSet rs4 = stmt.executeQuery("select * from participer "); ResultSetMetaData resultMeta4 = rs4.getMetaData(); // System.out.println("+++++++++"+rs4.getMetaData()); File file4 = new File( "C:\\Users\\help\\Desktop\\participer.json"); file4.createNewFile(); FileWriter writer4 = new FileWriter(file4); while (rs4.next()) { obj4.put("id_evenement", rs4.getObject(1));   obj4.put("id_user", rs4.getObject(2).toString());   Object jsoncontent4 = obj4; System.out.println("le" + jsoncontent4); jTextArea1.append(jsoncontent4.toString() + "\n"); writer4.write(jsoncontent4.toString() + "\n"); writer4.flush(); } rs4.close(); }   } catch (Exception e) { }   }// GEN-LAST:event_jButton2ActionPerformed   private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {// GEN-FIRST:event_jButton3ActionPerformed   Task task = new Task(jList1.getSelectedValuesList(), jTextArea1); task.addPropertyChangeListener(new PropertyChangeListener() {   public void propertyChange(PropertyChangeEvent evt) { if ("progress".equals(evt.getPropertyName())) { int progress = (Integer) evt.getNewValue(); jProgressBar1.setValue(progress); } }   });   task.execute();   }   // GEN-LAST:event_jButton3ActionPerformed public static class Task extends SwingWorker<Object, JSONObject> {   private final static String PATH = "C:/Users/help/Desktop/";   private final List<String> values;   private final JTextArea jtextArea;   public Task(List<String> values, JTextArea jtextArea) { this.values = values; this.jtextArea = jtextArea; }   @Override protected Object doInBackground() throws Exception {   int progression = 0;   try (Connection connect = DriverManager .getConnection("jdbc:mysql://localhost:3306/reseau_social", "root", "root")) { Statement stmt = connect.createStatement();   for (String value : values) {   createJSon(value, getTableName(value.toLowerCase()), getFileName(value.toLowerCase()), stmt); setProgress(++progression); // par exemple, pour une // progression par objet   }   }   return null; }   private String getTableName(String value) { return value;   /* ou si tu as besoin d'avoir des noms de tables différents associés à chaque mot sélectionné (ou utiliser une map)   String tableName; switch(value) { case "user": tableName = "user"; break; case "adress": tableName = "adress"; break; // JE TE LAISSE COMPLETER default: throw new IllegalStateException(); } return tableName;*/   }   private String getFileName(String value) { // return value + ".json" String filename; switch (value) { case "user": filename = "users"; break; case "adress": filename = "adress"; break; // JE TE LAISSE COMPLETER default: throw new IllegalStateException(); } return filename + ".json"; }   private void createJSon(String value, String tableName, String fileName, Statement stmt) throws SQLException, IOException { try (ResultSet rs1 = stmt .executeQuery("select * from " + tableName)) { ResultSetMetaData resultMeta = rs1.getMetaData();   try (BufferedWriter writer = Files.newBufferedWriter(Paths.get( PATH, fileName))) {   while (rs1.next()) { JSONObject json = new JSONObject(); for (int i = 1; i <= resultMeta.getColumnCount(); i++) { String columnName = resultMeta.getColumnName(i); json.put(columnName, rs1.getObject(i).toString()); } writer.write(json.toString()); writer.write(System.lineSeparator()); publish(json); }   }   } }   protected void process(java.util.List<JSONObject> chunks) {   for(JSONObject json : chunks) { jtextArea.append(json.toString()+"\n"); }   }   }   /**          * @param args          *            the command line arguments          */ public static void main(String args[]) { /* Set the Nimbus look and feel */ // <editor-fold defaultstate="collapsed" // desc=" Look and feel setting code (optional) "> /* * If Nimbus (introduced in Java SE 6) is not available, stay with the * default look and feel. For details see * http://download.oracle.com/javase * /tutorial/uiswing/lookandfeel/plaf.html */ try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager .getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(Generer_JSON.class.getName()) .log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(Generer_JSON.class.getName()) .log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(Generer_JSON.class.getName()) .log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(Generer_JSON.class.getName()) .log(java.util.logging.Level.SEVERE, null, ex); } // </editor-fold>   /* Create and display the form */ java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new Generer_JSON().setVisible(true); } }); }   // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JButton jButton1; private javax.swing.JButton jButton2; private javax.swing.JButton jButton3; private javax.swing.JList<String> jList1; private javax.swing.JList<String> jList2; private javax.swing.JProgressBar jProgressBar1; private javax.swing.JScrollPane jScrollPane1; private javax.swing.JScrollPane jScrollPane2; private javax.swing.JScrollPane jScrollPane3; private javax.swing.JTextArea jTextArea1; // End of variables declaration//GEN-END:variables }

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En tout cas, merci pour votre effort.

Bonjour ,
j'ai changé mon code source donc içi comment je peut integrer un jprogrssBar .
merci d'avance.

Code:

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try{ jLabel1.setVisible(true); Connection connect = DriverManager.getConnection("jdbc:mysql://localhost:3306/reseau_social","root","root");//?user=root&password=root\""); System.out.println("connexion à la base de données réussie "); Statement stmt = connect.createStatement();     DefaultListModel<String> model=new DefaultListModel<>(); for(Object selected :jList1.getSelectedValuesList()) { model.addElement((String) selected); } // Progrss p = new Progrss();   for (int k = 0; k < model.getSize(); k++) {   System.out.println(model.elementAt(k)); ResultSet rs = stmt.executeQuery( "select * from " +model.elementAt(k)) ; ResultSetMetaData resultMeta = rs.getMetaData(); JSONObject obj = new JSONObject(); JSONObject jsoncontent = new JSONObject(); // System.out.println("select * from " +model.elementAt(k)); File file1 =new File ("C:\\Users\\help\\Desktop\\"+model.elementAt(k)+".json") ; file1.createNewFile(); FileWriter writer =new FileWriter(file1);   while (rs.next()) { // JSONObject jsoncontent = new JSONObject();             for(int i=1; i<=resultMeta.getColumnCount(); i++) { String name = resultMeta.getColumnName(i);   jsoncontent.put(name, rs.getObject(i).toString()) ; // SwingUtilities.invokeLater(new migration.ExempleProgressMonitor.Update( ));   }     jLabel1.setVisible(false); writer.write(jsoncontent.toString()); jTextArea1.setVisible(true);   jTextArea1.append(jsoncontent.toString()+"\n"); writer.write(System.lineSeparator()); writer.flush();   }     rs.close();   }   JOptionPane.showMessageDialog(rootPane, "l'operation est terminé avec succes","information",WIDTH);     } catch (Exception e){ System.out.println(e); }     }

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Je t'ai mis le code dans mon dernier message (voir la méthode jButton3ActionPerformed), plus les liens vers les tutoriels dans des messages précédents.

• Créer une classe qui étend SwingWroker (dans mon exemple, elle s'appelle Task)
• Déplaces-y le code de la méthode qui fait le traitement long, dans la méthode doInBackground
• Traite les paramètres à passer entre ta méthode actionPerformed et ta classe de SwingWorker par arguments du constructeur
• Lances ta classe Task dans la méthode actionPerformed (voir dans mes exemple) :
• Ensuite la progressBar progresse de 0 à 100 : donc il faut d'arranger pour que la valeur progresse de 0 à 100.
  
  • Soit tu as un nombre fixe d'étapes connues d'avance (ça peut être un nombre d'éléments à traiter), et donc tu peux déterminer cette progression par règle de trois (calcul de pourcentage).
  • Soit tu as des étapes constituées de sous-étapes dont le nombre ne peut être connu d'avance, donc tu ne peux pas connaitre le nombre total d'avance.
    Dans ce cas, il faut réappliquer "localement" le calcul de pourcentage, sur la sous-partie qui constitue l'étape (avec plus de niveau, on pourrait envisager à faire une classe qui fait le calcul).
    Voici un code exemple pour illustrer un cas à 2 niveau :
    
    Code:

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    public static void main(String[] args) {   final int nbStep=12;   /*for(int i=0; i<nbStep; i++) { // ici le traitement progress(i+1, nbStep); }*/ for(int i=0; i<nbStep; i++) { int nbSubStep = 5+(int)Math.random()*25; // nombre de sous étapes dans l'étape courante for(int j=0; j<nbSubStep; j++) { // ici le traitement System.out.format("sous étape %d-%d : ", i+1, j+1); progress(i, nbStep, j+1, nbSubStep); } System.out.printf("fin d'étape %d : ", i+1); progress(i+1, 12); }   }   private static void progress(int step, int nbStep) { double stepSize = 100.0/nbStep; System.out.println( (int) (step * stepSize) ); }   private static void progress(int step, int nbStep, int subStep, int nbSubStep) { double stepSize = 100.0/nbStep; double subStepSize = stepSize/nbSubStep; System.out.println( (int) (step * stepSize + subStep * subStepSize)); }

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salut,
toujours le jprogressbar ne fonctionne pas si quelqu'un peut m'aider .
merci d'avance

Code:

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private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: Task task = new Task(jList1.getSelectedValuesList(), jTextArea1); task.addPropertyChangeListener(new PropertyChangeListener() {   public void propertyChange(PropertyChangeEvent evt) { if ("progress".equals(evt.getPropertyName())) { int progress = (Integer) evt.getNewValue(); jProgressBar1.setValue(progress); } }   });   task.execute();     } public class Task extends SwingWorker<Object, JSONObject> {   private final static String PATH = "C:/Users/help/Desktop/";   private final List<String> values;   private final JTextArea jtextArea;   public Task(List<String> values, JTextArea jtextArea1) { this.values = values; this.jtextArea = jtextArea1; } protected Object doInBackground() throws Exception {   int progression = 0; try{   Connection connect = DriverManager.getConnection("jdbc:mysql://localhost:3306/reseau_social","root","root");//?user=root&password=root\""); System.out.println("connexion à la base de données réussie "); Statement stmt = connect.createStatement(); // jList1.getSelectionModel().addListSelectionListener(null);   DefaultListModel<String> model1=new DefaultListModel<>(); ResultSet rs1 = stmt.executeQuery("show tables " ); while (rs1.next()) {     String table =rs1.getString(1); model1.addElement(table.toUpperCase()); System.out.println(table);   } jList1.setModel(model1);               } catch(Exception e){System.out.println(e);} return null; } }   protected void process(java.util.List<JSONObject> chunks) {   for(JSONObject json : chunks) { jTextArea1.append(json.toString()+"\n"); }   }

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Il faut appeler la méthode setProgress(int) dans doInBackground(), avec une valeur qui progresse. Et il faut le la valeur qui progresse progresse de 0 à 100. Donc, il faut que tu t'arranges pour avoir un moyen d'avoir une valeur qui progresse de 0 à 100.
Cependant, il faut que le process soit adapté pour ça. Dans ton process (qui n'a plus rien à voir avec celui de ton premier exemple), il y a 2 parties :

1. La partie requête
2. La partie boucle pour remplir le modèle

A moins d'avoir une base de données super pourrie, ou d'avoir énormément de tables dedans, il y a peu de chance que cette partie soit longue à s'exécuter. Mais si elle l'était, ce serait compliqué de faire une progression de 0 à 100, d'une part parce que l'exécution de la requête est bloquante pour le thread appelant (donc il faudrait éventuellement faire la progression dans un autre thread), mais en plus il n'y a aucun moyen de savoir à l'avance combien de temps ça va prendre, donc de connaitre la progression : il faut donc opter pour une progression indéterminée (quoique personnellement je préfère dans ce cas avoir une simple image animée du type Pièce jointe 172448).

Pour que ce qui est de la boucle, c'est pareil, s'il n'y a que peu de tables, ça va aller tellement vite, qu'on ne verra aucune progression. Mais pour le principe, de pouvoir progresser de 0 à 100, il faut connaitre le nombre de tables : donc soit faire une première requête pour le déterminer, soit de pouvoir utiliser un ResultSet qui te permette de te déplacer en avant et en arr^ière (et pas seulement avec next());

Code:

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connection.createStatement(sql, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);

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Ce qui te permet de compter les enregistrement :

Code:

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rs1.last(); // aller directement à la fin nbTables = rs1.getRow(); // prendre le numéro du dernier enregistrement = le nombre de enregistrements rs1.beforeFirst(); // pour revenir au début, et faire le while(rs1.next())

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Voir la FAQ pour plus de détail.

On peut bien entendu faire une progression sur les 2 parties, en divisant le process en 2 étapes :

1. La partie requête, qui prend par exemple10% du process global
2. La partie boucle qui prend 90%.

Avec une répartition selon le mode que j'ai indiqué dans un précédent post.