Problème de RMI

Version imprimable

Problème de RMI

bonjour à tous j'essaie de faire une application client-serveur pour enregistrer des informations dans une bd postgresql j'ai suivit le tutoriel de developpez.com et lorsque j’exécute mes codes j'ai des exceptions que je ne comprends pqs voila mes codes:

Code:

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package monpackage;
 
import javax.swing.SwingUtilities;
import java.awt.Color;
import java.awt.Cursor;
 
import javax.swing.BorderFactory;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.Rectangle;
import javax.swing.JTextField;
import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.NotBoundException;
import java.rmi.RMISecurityManager;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.net.*;
 
import javax.swing.JComboBox;
import javax.swing.JButton;
 
public class LancerClient extends JFrame {
 
	private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private JPanel jPanel = null;
	private JLabel jLabel = null;
	private JLabel jLabel1 = null;
	private JLabel jLabel2 = null;
	private JLabel jLabel3 = null;
	private JLabel jLabel4 = null;
	private JTextField jTextField = null;
	private JTextField jTextField1 = null;
	private JTextField jTextField2 = null;
	private JComboBox jComboBox = null;
	private JComboBox jComboBox1 = null;
	private JButton jButton = null;
	private JLabel jLabel5 = null;
	public Etudiant et;
	private JButton jButton1 = null;
	private JButton jButton2 = null;
	/**
         * This method initializes jPanel       
         *      
         * @return javax.swing.JPanel   
         */
	private JPanel getJPanel() {
		if (jPanel == null) {
			jLabel4 = new JLabel();
			jLabel4.setBounds(new Rectangle(10, 180, 100, 30));
			jLabel4.setText("Niveau");
			jLabel3 = new JLabel();
			jLabel3.setBounds(new Rectangle(10, 140, 100, 30));
			jLabel3.setText("Filière");
			jLabel2 = new JLabel();
			jLabel2.setBounds(new Rectangle(10, 100, 100, 30));
			jLabel2.setText("Matricule:");
			jLabel1 = new JLabel();
			jLabel1.setBounds(new Rectangle(10, 60, 50, 30));
			jLabel1.setText("Prenom:");
			jLabel = new JLabel();
			jLabel.setBounds(new Rectangle(10, 20, 50, 30));
			jLabel.setText("Nom:");
			jPanel = new JPanel();
			jPanel.setBorder(BorderFactory.createTitledBorder("Formulaire d'enregistrement"));
			jPanel.setLayout(null);
			jPanel.setBounds(new Rectangle(12, 45, 531, 214));
			jPanel.add(jLabel, null);
			jPanel.add(jLabel1, null);
			jPanel.add(jLabel2, null);
			jPanel.add(jLabel3, null);
			jPanel.add(jLabel4, null);
			jPanel.add(getJTextField(), null);
			jPanel.add(getJTextField1(), null);
			jPanel.add(getJTextField2(), null);
			jPanel.add(getJComboBox(), null);
			jPanel.add(getJComboBox1(), null);
			jPanel.setBackground(Color.red);
		}
		return jPanel;
	}
 
	/**
         * This method initializes jTextField   
         *      
         * @return javax.swing.JTextField       
         */
	private JTextField getJTextField() {
		if (jTextField == null) {
			jTextField = new JTextField();
			jTextField.setBounds(new Rectangle(120, 20, 200, 30));
		}
		return jTextField;
	}
 
	/**
         * This method initializes jTextField1  
         *      
         * @return javax.swing.JTextField       
         */
	private JTextField getJTextField1() {
		if (jTextField1 == null) {
			jTextField1 = new JTextField();
			jTextField1.setBounds(new Rectangle(120, 60, 200, 30));
		}
		return jTextField1;
	}
 
	/**
         * This method initializes jTextField2  
         *      
         * @return javax.swing.JTextField       
         */
	private JTextField getJTextField2() {
		if (jTextField2 == null) {
			jTextField2 = new JTextField();
			jTextField2.setBounds(new Rectangle(120, 100, 200, 30));
		}
		return jTextField2;
	}
 
	/**
         * This method initializes jComboBox    
         *      
         * @return javax.swing.JComboBox        
         */
	private JComboBox getJComboBox() {
		if (jComboBox == null) {
			jComboBox = new JComboBox();
			jComboBox.setBounds(new Rectangle(120, 140, 100, 30));
			jComboBox.addItem("");
			jComboBox.addItem("GTR");
			jComboBox.addItem("GE");
			jComboBox.addItem("MIP");
			jComboBox.addItem("IG");
			jComboBox.addItem("GC");
		}
		return jComboBox;
	}
 
	/**
         * This method initializes jComboBox1   
         *      
         * @return javax.swing.JComboBox        
         */
	private JComboBox getJComboBox1() {
		if (jComboBox1 == null) {
			jComboBox1 = new JComboBox();
			jComboBox1.setBounds(new Rectangle(120, 180, 100, 30));
			jComboBox1.addItem("");
			jComboBox1.addItem("1");
			jComboBox1.addItem("2");
			jComboBox1.addItem("3");
		}
		return jComboBox1;
	}
 
	/**
         * This method initializes jButton      
         *      
         * @return javax.swing.JButton  
         */
	private JButton getJButton() {
		if (jButton == null) {
			jButton = new JButton();
			jButton.setBounds(new Rectangle(40, 265, 129, 28));
			jButton.setText("Enregistrer");
			jButton.setCursor(new Cursor(Cursor.HAND_CURSOR));
			jButton.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					String req="insert into etudiant(nom,prenom,matricule,filiere,niveau) values('"+jTextField.getText()+"','"+jTextField1.getText()+"','"+jTextField2.getText()+"','"+jComboBox.getSelectedItem()+"','"+jComboBox1.getSelectedItem()+"')";
					try {
						et.SQLupdate(req);
						jTextField.setText("");
						jTextField1.setText("");
						jTextField2.setText("");
						jComboBox.setSelectedIndex(0);
						jComboBox1.setSelectedIndex(0);
					} catch (RemoteException e1) {
						e1.printStackTrace();
					}
				}
			});
		}
		return jButton;
	}
 
	/**
         * This method initializes jButton1     
         *      
         * @return javax.swing.JButton  
         */
	private JButton getJButton1() {
		if (jButton1 == null) {
			jButton1 = new JButton();
			jButton1.setBounds(new Rectangle(193, 264, 122, 30));
			jButton1.setText("Annuler");
			jButton1.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					jTextField.setText("");
					jTextField1.setText("");
					jTextField2.setText("");
					jComboBox.setSelectedIndex(0);
					jComboBox1.setSelectedIndex(0);
				}
			});
		}
		return jButton1;
	}
 
	/**
         * This method initializes jButton2     
         *      
         * @return javax.swing.JButton  
         */
	private JButton getJButton2() {
		if (jButton2 == null) {
			jButton2 = new JButton();
			jButton2.setBounds(new Rectangle(339, 265, 121, 30));
			jButton2.setText("Lister");
			jButton2.addActionListener(new java.awt.event.ActionListener() {
				public void actionPerformed(java.awt.event.ActionEvent e) {
					new ListeEtudiant().setVisible(true);
				}
			});
		}
		return jButton2;
	}
 
	public static void main(String[] args) {
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				LancerClient thisClass = new LancerClient();
				thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				thisClass.setVisible(true);
			}
		});
	}
 
	public LancerClient() {
		super();
		initialize();
		System.out.println("Lancement du client...");
		if(System.getSecurityManager()==null){
			System.setSecurityManager(new RMISecurityManager());
		}
		try{
			Remote r=Naming.lookup("rmi://127.0.0.1:10990/TestRMI");
			System.out.println(r);
			if(r instanceof Etudiant){
				et=(Etudiant)r;
				System.out.println("Création de l'objet");
			}
		}catch(RemoteException e){
			e.printStackTrace();
		}
		catch(MalformedURLException e){
			e.printStackTrace();
		}
		catch(NotBoundException e){
			e.printStackTrace();
		}
		System.out.println("Fin du client");
	}
 
	private void initialize() {
		this.setSize(574, 345);
		this.setContentPane(getJContentPane());
		this.setTitle("JFrame");
	}
 
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jLabel5 = new JLabel();
			jLabel5.setBounds(new Rectangle(142, 6, 270, 37));
			jLabel5.setText("Formulaire d'enregistrement de l'etudiant");
			jContentPane = new JPanel();
			jContentPane.setLayout(null);
			jContentPane.add(getJPanel(), null);
			jContentPane.add(getJButton(), null);
			jContentPane.add(jLabel5, null);
			jContentPane.add(getJButton1(), null);
			jContentPane.add(getJButton2(), null);
			jContentPane.setBackground(Color.blue);
		}
		return jContentPane;
	}
 
}  //  @jve:decl-index=0:visual-constraint="10,10"

Code:

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package monpackage;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.beans.Statement;
import java.sql.*;
import java.util.Enumeration;
import java.util.Properties;
import javax.swing.JOptionPane;
public class EtudiantImpl extends UnicastRemoteObject implements Etudiant{
	private static final long serialVersionUID = 1L;
	  static Connection con = null;
	  static ResultSet resultats = null;
	  private Message msg = new Message();
	protected EtudiantImpl() throws RemoteException {
		super();
		try {
			Class.forName("org.postgresql.Driver");
			String url = "jdbc:postgresql://127.0.0.1:5432/Universite";
			String user = "postgres";
			String passwd = "keryjames";
			con = DriverManager.getConnection(url, user, passwd);
			//JOptionPane.showMessageDialog(null, "Ok");
		} catch (Exception e) {
			e.printStackTrace();
			System.out.print(e);
		}	
	}
	//@Override
	public void SQLupdate(String req) throws RemoteException {
	     try {
 
		       java.sql.Statement stmt =  con.createStatement();
		       ((java.sql.Statement) stmt).executeUpdate(req);
		       msg.dialog("requette executée avec succes");
		     }
		     catch (SQLException e) {
		       msg.error("Impossible d'executer la requete : \n" + e);
		     }
		   }
 
		  public void SQLupdateNotResponse(String req) {
			    try {
 
				      Statement stmt = (Statement) con.createStatement();
				      ((java.sql.Statement) stmt).executeUpdate(req);
				      msg.dialog("requette executée avec succes");
				    }
				    catch (SQLException e) {
				      msg.error("Impossible d'executer la requete: \n" + e.getMessage());
				    }
	}
//	@Override
	public String[][] DataQuery(String req) throws RemoteException {
	     int rows = numRows(req);
	     int cols = numCols(req);
	     String[][] donnees = new String[rows][cols];
 
	     SQLquery(req);
	     try {
	       ResultSetMetaData rsmd = resultats.getMetaData();
	       int nbCols = rsmd.getColumnCount();
	       boolean encore = resultats.next();
	       int numTuple = 0;
	       while (encore) {
	         for (int i = 0; i < nbCols; i++) {
	           donnees[numTuple][i] = resultats.getString(i + 1);
	         }
	         encore = resultats.next();
	         numTuple++;
	       }
	       resultats.close();
 
	     }
	     catch (SQLException e) {
	      // msg.error(e.getMessage());
	     }
	     return donnees;
	}
	   public int numCols(String sql)
 
	   {
	     int nbre = 0;
	     SQLquery(sql);
	     try {
	       ResultSetMetaData rsmd = resultats.getMetaData();
	       nbre = rsmd.getColumnCount();
	       resultats.close();
	     }
	     catch (SQLException e) {
	      // msg.error(e.getMessage());
	     }
	     return nbre;
	   }
	   public int numRows(String sql) {
		     int nbre = 0;
		     SQLquery(sql);
		     try {
		       //ResultSetMetaData rsmd = resultats.getMetaData();
		       //int nbCols = rsmd.getColumnCount();
		       boolean encore = resultats.next();
		       while (encore) {
		         encore = resultats.next();
		         nbre++;
		       }
		       resultats.close();
		     }
		     catch (SQLException e) {
		       //msg.error(e.getMessage());
		     }
		     return nbre;
		   }
		  public void SQLquery(String sql) {
			    //execution de la requête
 
			    try {
			      Statement stmt = (Statement) con.createStatement();
			      resultats = ((java.sql.Statement) stmt).executeQuery(sql);
			    }
			    catch (SQLException e) {
			     // msg.error("Impossible d'exécuter la requête" + e.getMessage());
			      //System.exit(0);
			    }
 
			  }
		   public boolean SQLupdateResponse(String req) {
			     try {
 
			       Statement stmt = (Statement) con.createStatement();
			       ((java.sql.Statement) stmt).executeUpdate(req);
			       msg.dialog("requette executée avec succes");
			       return true;
			     }
			     catch (SQLException e) {
			       msg.error("Impossible d'executer la requete: \n" + e.getMessage());
			       return false;
			     }
 
			   }
 
}

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package monpackage;
import java.net.Inet4Address;
import java.net.MalformedURLException;
import java.net.UnknownHostException;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
 
 
public class LancerServeur {
 
	public static  void main (String[] args) throws UnknownHostException
	{
 
		try{
 
		LocateRegistry.createRegistry(10990);
		System.out.println("Mise en place de la sécurité Manger");
		if(System.getSecurityManager()==null)
		{
			System.setSecurityManager(new RMISecurityManager());
		}
		EtudiantImpl et = new EtudiantImpl();
		String url="rmi://127.0.0.1/TestRMI";
		//String url="rmi://127.0.0.1/TestRMI";
		System.out.println("enregistrement de l'objet avec l'url "+url);
		Naming.rebind(url, et);
		System.out.println("Serveur lancé");
		}catch(RemoteException e)
		{
		   e.printStackTrace();
 
		}
		catch(MalformedURLException e)
		{  
			e.printStackTrace();
		}
	}
 
 
}

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package monpackage;
 
import java.rmi.Remote;
import java.rmi.RemoteException;
 
public interface Etudiant extends Remote{
	public void SQLupdate(String req) throws RemoteException;
	public String[][] DataQuery(String req) throws RemoteException; 
 
}

lorsque j'execute les serveur pas de problème mais c'est au niveau du client que l'objet distant n'est pas créé

18/10/2012, 20h28
wax78

Tu peux poster les stacktrace ?

Code:

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D:\workspace\Rmi\bin>java -Djava.security.policy=ma_policy_serveur.txt monpackag
e.LancerClient
Lancement du client...
java.rmi.NotBoundException: TestRMI
        at sun.rmi.registry.RegistryImpl.lookup(Unknown Source)
        at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
        at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
        at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
rce)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
ce)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
        at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
n Source)
        at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
        at sun.rmi.server.UnicastRef.invoke(Unknown Source)
        at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
        at java.rmi.Naming.lookup(Unknown Source)
        at monpackage.LancerClient.<init>(LancerClient.java:250)
        at monpackage.LancerClient$4.run(LancerClient.java:235)
        at java.awt.event.InvocationEvent.dispatch(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)
Fin du client

et lorsque je clique sur enregistrer voilà les exceptions:

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Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at monpackage.LancerClient$1.actionPerformed(LancerClient.java:175)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at monpackage.ListeEtudiant.getJTable(ListeEtudiant.java:110)
        at monpackage.ListeEtudiant.getJScrollPane(ListeEtudiant.java:95)
        at monpackage.ListeEtudiant.getJContentPane(ListeEtudiant.java:80)
        at monpackage.ListeEtudiant.initialize(ListeEtudiant.java:64)
        at monpackage.ListeEtudiant.<init>(ListeEtudiant.java:33)
        at monpackage.LancerClient$3.actionPerformed(LancerClient.java:225)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)

bon j'ai résolu le problème c’était au niveau de la ligne suivante dans LancerClient:

Code:

Remote r=Naming.lookup("rmi://127.0.0.1:1099/TestRMI");

rectificatif:

Code:

Remote r=Naming.lookup("rmi://127.0.0.1/TestRMI");

maintenant j'ai un problème de casting à la ligne suivante:

Code:

java.sql.Statement stmt = (java.sql.Statement) con.createStatement();

voilà l'exception suivante:

Code:

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Lancement du client...
EtudiantImpl_Stub[UnicastRef [liveRef: [endpoint:[192.168.10.242:57996](remote),
objID:[10c2104:13a76145430:-7fff, -5132808961722524217]]]]
CrÚation de l'objet
Fin du client
CrÚation de l'objet
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: org.postgre
sql.jdbc4.Jdbc4Statement cannot be cast to java.beans.Statement
        at monpackage.EtudiantImpl.SQLquery(EtudiantImpl.java:116)
        at monpackage.EtudiantImpl.numRows(EtudiantImpl.java:96)
        at monpackage.EtudiantImpl.DataQuery(EtudiantImpl.java:54)
        at monpackage.EtudiantImpl_Skel.dispatch(Unknown Source)
        at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
        at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
rce)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
ce)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
        at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
n Source)
        at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
        at sun.rmi.server.UnicastRef.invoke(Unknown Source)
        at monpackage.EtudiantImpl_Stub.DataQuery(Unknown Source)
        at monpackage.ListeEtudiant.getJTable(ListeEtudiant.java:114)
        at monpackage.ListeEtudiant.getJScrollPane(ListeEtudiant.java:95)
        at monpackage.ListeEtudiant.getJContentPane(ListeEtudiant.java:80)
        at monpackage.ListeEtudiant.initialize(ListeEtudiant.java:64)
        at monpackage.ListeEtudiant.<init>(ListeEtudiant.java:33)
        at monpackage.LancerClient$3.actionPerformed(LancerClient.java:225)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)

bon là j'ai un peux avancé le véritable problème c’était que lorsque je fessais des modifications je ne relançais pas le registre et sa ne prenais pas en compte les modifications maintenant le problème c'est dans le code plus de problème de RMI voilà les exceptions:

Code:

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Lancement du client...
Proxy[Etudiant,RemoteObjectInvocationHandler[UnicastRef [liveRef: [endpoint:[192
.168.10.242:49419](remote),objID:[-4c61ec60:13a76948fab:-7fff, -6200236839724479
847]]]]]
CrÚation de l'objet Proxy[Etudiant,RemoteObjectInvocationHandler[UnicastRef [liv
eRef: [endpoint:[192.168.10.242:49419](remote),objID:[-4c61ec60:13a76948fab:-7ff
f, -6200236839724479847]]]]]
CrÚation de l'objet
java.rmi.ServerError: Error occurred in server thread; nested exception is:
        java.lang.Error: Unresolved compilation problem:
        nbCols cannot be resolved to a variable
 
        at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
rce)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
ce)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
        at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
n Source)
        at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
        at sun.rmi.server.UnicastRef.invoke(Unknown Source)
        at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unkn
own Source)
        at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source)
        at $Proxy0.DataQuery(Unknown Source)
        at monpackage.ListeEtudiant.getJTable(ListeEtudiant.java:113)
        at monpackage.ListeEtudiant.getJScrollPane(ListeEtudiant.java:95)
        at monpackage.ListeEtudiant.getJContentPane(ListeEtudiant.java:80)
        at monpackage.ListeEtudiant.initialize(ListeEtudiant.java:64)
        at monpackage.ListeEtudiant.<init>(ListeEtudiant.java:53)
        at monpackage.LancerClient$3.actionPerformed(LancerClient.java:225)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.Error: Unresolved compilation problem:
        nbCols cannot be resolved to a variable
 
        at monpackage.EtudiantImpl.DataQuery(EtudiantImpl.java:119)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
rce)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
ce)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Fin du client

j'avais mis 2 lignes en commentaires:

Code:

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ResultSetMetaData rsmd = resultats.getMetaData();
	       int nbCols = rsmd.getColumnCount();

maintenant le problème c'est au niveau de:

Code:

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Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at monpackage.EtudiantImpl.numRows(EtudiantImpl.java:95)
        at monpackage.EtudiantImpl.DataQuery(EtudiantImpl.java:109)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at sun.rmi.transport.Transport$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at sun.rmi.transport.Transport.serviceCall(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Sou
rce)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Sour
ce)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
        at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
n Source)
        at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
        at sun.rmi.server.UnicastRef.invoke(Unknown Source)
        at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unkn
own Source)
        at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source)
        at $Proxy0.DataQuery(Unknown Source)
        at monpackage.ListeEtudiant.getJTable(ListeEtudiant.java:113)
        at monpackage.ListeEtudiant.getJScrollPane(ListeEtudiant.java:95)
        at monpackage.ListeEtudiant.getJContentPane(ListeEtudiant.java:80)
        at monpackage.ListeEtudiant.initialize(ListeEtudiant.java:64)
        at monpackage.ListeEtudiant.<init>(ListeEtudiant.java:53)
        at monpackage.LancerClient$3.actionPerformed(LancerClient.java:224)
        at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
        at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
        at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Sour
ce)
        at java.awt.Component.processMouseEvent(Unknown Source)
        at javax.swing.JComponent.processMouseEvent(Unknown Source)
        at java.awt.Component.processEvent(Unknown Source)
        at java.awt.Container.processEvent(Unknown Source)
        at java.awt.Component.dispatchEventImpl(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
        at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
        at java.awt.Container.dispatchEventImpl(Unknown Source)
        at java.awt.Window.dispatchEventImpl(Unknown Source)
        at java.awt.Component.dispatchEvent(Unknown Source)
        at java.awt.EventQueue.dispatchEvent(Unknown Source)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
        at java.awt.EventDispatchThread.run(Unknown Source)
 
D:\workspace\Rmi\bin>

voilà j'ai trouvé la solution il faut plutôt utiliser:

Code:

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package monpackage;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.beans.Statement;
import java.sql.*;
public class EtudiantImpl extends UnicastRemoteObject implements Etudiant{
	private static final long serialVersionUID = 1L;
	  static Connection con = null;
	  static ResultSet resultats = null;
	  private Message msg = new Message();
	  protected EtudiantImpl() throws RemoteException {
		super();
		try {
			Class.forName("org.postgresql.Driver");
			String url = "jdbc:postgresql://127.0.0.1:5432/Universite";
			String user = "postgres";
			String passwd = "keryjames";
			con = DriverManager.getConnection(url, user, passwd);
		} catch (Exception e) {
			e.printStackTrace();
			System.out.print(e);
		}		
	}
	  //**********************Exécute les requêtes de MAJ ds la BD**********************************
	   public void SQLupdate(String req) {
	     try {
 
	       java.sql.Statement stmt =  con.createStatement();
	       ((java.sql.Statement) stmt).executeUpdate(req);
	       msg.dialog("requette executée avec succes");
	     }
	     catch (SQLException e) {
	       msg.error("Impossible d'executer la requete : \n" + e);
	     }
	   }
 
	  public void SQLupdateNotResponse(String req) {
	    try {
 
	      Statement stmt = (Statement) con.createStatement();
	      ((java.sql.Statement) stmt).executeUpdate(req);
	      msg.dialog("requette executée avec succes");
	    }
	    catch (SQLException e) {
	      msg.error("Impossible d'executer la requete: \n" + e.getMessage());
	    }
	  }
 
	//************************************************************************
	   public boolean SQLupdateResponse(String req) {
	     try {
 
	       Statement stmt = (Statement) con.createStatement();
	       ((java.sql.Statement) stmt).executeUpdate(req);
	       msg.dialog("requette executée avec succes");
	       return true;
	     }
	     catch (SQLException e) {
	       msg.error("Impossible d'executer la requete: \n" + e.getMessage());
	       return false;
	     }
 
	   }
 
	//----------------Exécute les requêtes de lecture ds la BD------------
	  public void SQLquery(String sql) {
	    //execution de la requête
 
	    try {
	      java.sql.Statement stmt = con.createStatement();
	      resultats = ((java.sql.Statement) stmt).executeQuery(sql);
	    }
	    catch (SQLException e) {
	      msg.error("Impossible d'exécuter la requête" + e.getMessage());
	      //System.exit(0);
	    }
 
	  }
 
	//****************Retourne le nombre de ligne de la requête****************
 
	   public int numRows(String sql) {
	     int nbre = 0;
	     SQLquery(sql);
	     try {
	       //ResultSetMetaData rsmd = resultats.getMetaData();
	       //int nbCols = rsmd.getColumnCount();
	       boolean encore = resultats.next();
	       while (encore) {
	         encore = resultats.next();
	         nbre++;
	       }
	       resultats.close();
	     }
	     catch (SQLException e) {
	       msg.error(e.getMessage());
	     }
	     return nbre;
	   }
 
	//*******************Retourne le nombre de colonne d'un requête**********************************
 
	   public int numCols(String sql)
 
	   {
	     int nbre = 0;
	     SQLquery(sql);
	     try {
	       ResultSetMetaData rsmd = resultats.getMetaData();
	       nbre = rsmd.getColumnCount();
	       resultats.close();
	     }
	     catch (SQLException e) {
	       msg.error(e.getMessage());
	     }
	     return nbre;
	   }
 
	//***************Retourne une matrice de données (résultat de la requête prise en paramètre) *********************
 
	   public String[][] DataQuery(String query) {
	     int rows = numRows(query);
	     int cols = numCols(query);
	     String[][] donnees = new String[rows][cols];
	     SQLquery(query);
	     try {
	       ResultSetMetaData rsmd = resultats.getMetaData();
	       int nbCols = rsmd.getColumnCount();
	       boolean encore = resultats.next();
	       int numTuple = 0;
	       while (encore) {
	         for (int i = 0; i < nbCols; i++) {
	           donnees[numTuple][i] = resultats.getString(i + 1);
	         }
	         encore = resultats.next();
	         numTuple++;
	       }
	       resultats.close();
 
	     }
	     catch (SQLException e) {
	       msg.error(e.getMessage());
	     }
 
	     return donnees;
 
	   }	   
}