COMMUNICATION APPLET SERVLET avec dopsot( )

bonjour je vien de realisé une communication entre une servlet et une applet (JAPPLET with swing). j'ai fait (en principe ) les etapes necessaire, voici mon code pour mieu comprandre. applet: import java.awt.event.ActionEvent; import java.io.DataOutputStream; import java.io.IOException; /* * ApplClient.java * * Created on 18 novembre 2008, 20:10 */ import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; import java.net.URL; import java.net.URLConnection; import java.util.Vector; import java.util.logging.Level; import java.util.logging.Logger; /** * * @author HEDAHDIA */ public class ApplClient extends javax.swing.JApplet { private Vector result; private static String Servlet = "http://localhost:8080/WEBMAD/Server"; private URL u; /** Initializes the applet ApplClient */ public void init() { try { java.awt.EventQueue.invokeAndWait(new Runnable() { public void run() { initComponents(); } }); } catch (Exception ex) { ex.printStackTrace(); } } /** This method is called from within the init() method to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // //GEN-BEGIN:initComponents private void initComponents() { jPanel1 = new javax.swing.JPanel(); Groupe3 = new javax.swing.JRadioButton(); okGroupe3 = new javax.swing.JButton(); jComboBox1 = new javax.swing.JComboBox(); Groupe3.setText("30-Groupe3"); okGroupe3.setText("OK"); okGroupe3.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { okGroupe3ActionPerformed(evt); } }); jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" })); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(29, 29, 29) .addComponent(Groupe3) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 154, Short.MAX_VALUE) .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(78, 78, 78)) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(156, 156, 156) .addComponent(okGroupe3) .addContainerGap(197, Short.MAX_VALUE)) ); jPanel1Layout.setVerticalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(65, 65, 65) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(Groupe3) .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 107, Short.MAX_VALUE) .addComponent(okGroupe3) .addGap(82, 82, 82)) ); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) ); }// //GEN-END:initComponents private void okGroupe3ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_okGroupe3ActionPerformed URLConnection con = null; try { con = getConnection(); System.out.println("conniction etablié"); } catch (IOException ex) { Logger.getLogger(ApplClient.class.getName()).log(Level.SEVERE, null, ex); } try { Serializable objs = "Sys30"; sendObject(con, objs); } catch (IOException ex) { Logger.getLogger(ApplClient.class.getName()).log(Level.SEVERE, null, ex); } try { System.out.println( (String)receiveObject( con )); result = (Vector) receiveObject( con ); } catch (Exception ex) { Logger.getLogger(ApplClient.class.getName()).log(Level.SEVERE, null, ex); } System.out.println("message recu"); int i = 0; while(result.size()== i){ jComboBox1.addItem((String)result.elementAt(i)); i++; }//GEN-LAST:event_okGroupe3ActionPerformed } // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JRadioButton Groupe3; private javax.swing.JComboBox jComboBox1; private javax.swing.JPanel jPanel1; private javax.swing.JButton okGroupe3; // End of variables declaration//GEN-END:variables private URLConnection getConnection() throws IOException { URL u = new URL(Servlet); URLConnection con = u.openConnection() ; con.setDoInput( true ); con.setDoOutput( true ); con.setUseCaches( false ); con.setRequestProperty("Content-type","application/octet-stream"); con.setAllowUserInteraction( false ); return con ; } private void sendObject(URLConnection con ,Serializable objs ) throws IOException { ObjectOutputStream out = new ObjectOutputStream( con.getOutputStream()); // serialiser l'obj . out.writeObject(objs); out.flush(); out.close(); } private Object receiveObject(URLConnection con ) throws Exception { ObjectInputStream in = new ObjectInputStream( con.getInputStream()) ; Object obj = in.readObject(); in.close(); return obj ; } public void actionPerformed(ActionEvent e) { throw new UnsupportedOperationException("Not supported yet."); } } coté servlet: /* * To change this template, choose Tools | Templates * and open the template in the editor. */ import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.PrintWriter; import java.util.Vector; import java.util.logging.Level; import java.util.logging.Logger; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import jess.JessException; import jess.Rete; import se.liu.ida.JessTab.JessTabFunctions; import jess.*; /** * * @author HEDAHDIA */ public class ServerWEBMAD extends HttpServlet { private Rete moteur; private Vector result; private String query; /** * Processes requests for both HTTP GET and POST methods. * @param request servlet request * @param response servlet response */ // /** * Handles the HTTP GET method. * @param request servlet request * @param response servlet response */ /** * Handles the HTTP POST method. * @param request servlet request * @param response servlet response */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { // initServer(); String Tranche = (String) receiveObject(request); sendObject(response,result); } catch (Exception ex) { Logger.getLogger(ServerWEBMAD.class.getName()).log(Level.SEVERE, null, ex); } } private Object receiveObject( HttpServletRequest req ) throws Exception { ObjectInputStream in = new ObjectInputStream( req.getInputStream() ); Object obj = in.readObject(); in.close(); return obj ; } private void sendObject( HttpServletResponse resp , Object obj ) throws Exception { ObjectOutputStream out = new ObjectOutputStream( resp.getOutputStream() ); out.writeObject( obj ); out.close(); } private void initServer() throws JessException{ moteur = new Rete(); moteur.addUserpackage(new JessTabFunctions()); moteur.executeCommand("(load-project Turb-Onto.pprj)"); } public String getServletInfo() { return "Short description"; } } je suis vriment épuisé a cause de se problem le voila : java.io.EOFException (bottonok3actionperformed())

merci pour le tasse de café: je repete ma question pour la communication entr applet et servlet a base de HTTP.(a base d'objet) mon problem c 'est au niveau de l'applet elle resoi pa la réponse de servlet(malgré que l'objet est serialisé). voici mon code: applet: import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; /* * test1.java * * Created on 20 novembre 2008, 10:42 */ import java.util.Vector; /**HEDAHDIA/ * Suite a la projet WebApplication4. * On utilise cette Applet pour testter la communication avec la servlet on * utlisant les composants SWING * */ public class test2 extends javax.swing.JApplet { private static final String servlet="http://localhost:8080/WEBMAD1.1/Serveur.PipelineServletA"; private URLConnection con; /** Initializes the applet test1 */ public void init() { try { java.awt.EventQueue.invokeAndWait(new Runnable() { public void run() { initComponents(); } }); } catch (Exception ex) { ex.printStackTrace(); } } /** This method is called from within the init() method to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // //GEN-BEGIN:initComponents private void initComponents() { jPanel1 = new javax.swing.JPanel(); jLabel1 = new javax.swing.JLabel(); jTextField1 = new javax.swing.JTextField(); jButton1 = new javax.swing.JButton(); jComboBox1 = new javax.swing.JComboBox(); jButton1.setText("envoyer"); jButton1.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { jButton1ActionPerformed(evt); } }); jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" })); javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1); jPanel1.setLayout(jPanel1Layout); jPanel1Layout.setHorizontalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(108, 108, 108) .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 178, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(45, 45, 45) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 271, javax.swing.GroupLayout.PREFERRED_SIZE))) .addContainerGap(84, Short.MAX_VALUE)) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup() .addGap(94, 94, 94) .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 113, Short.MAX_VALUE) .addComponent(jButton1) .addGap(64, 64, 64)) ); jPanel1Layout.setVerticalGroup( jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(jPanel1Layout.createSequentialGroup() .addGap(53, 53, 53) .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE) .addGap(42, 42, 42) .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jButton1) .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(81, 81, 81) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(58, Short.MAX_VALUE)) ); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE) ); }// //GEN-END:initComponents private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed int i; try { URLConnection con1=getServletConnection(); // get input data for sending Vector Tab1 = new Vector(); for (i=1;i < 5;i++){ String input = jTextField1.getText() ; Tab1.addElement(input); } // send data to the servlet sendObject(con1,Tab1); // receive result from servlet Vector Res =new Vector(); Res =(Vector)receiveObject(con1); while(Res.size()== i){ jComboBox1.addItem((String)Res.elementAt(i)); i++; } } catch (Exception ex) { ex.printStackTrace(); } }//GEN-LAST:event_jButton1ActionPerformed // Variables declaration - do not modify//GEN-BEGIN:variables private javax.swing.JButton jButton1; private javax.swing.JComboBox jComboBox1; private javax.swing.JLabel jLabel1; private javax.swing.JPanel jPanel1; private javax.swing.JTextField jTextField1; // End of variables declaration//GEN-END:variables /** * Get a connection to the servlet. */ private URLConnection getServletConnection() throws MalformedURLException, IOException { URL urlServlet = new URL(getCodeBase(), servlet); URLConnection con = urlServlet.openConnection(); con.setDoInput(true); con.setDoOutput(true); con.setUseCaches(false); con.setRequestProperty("Content-Type","application/x-java-serialized-object"); return con; } private void sendObject( URLConnection con , Object obj ) throws IOException { ObjectOutputStream out = new ObjectOutputStream( con.getOutputStream() ); if ( obj != null ) { out.writeObject( obj ); } out.close(); } private Object receiveObject( URLConnection con ) throws Exception { ObjectInputStream in = new ObjectInputStream( con.getInputStream()) ; Object obj = in.readObject(); in.close(); return obj ; } } servlet: package Serveur; /* * To change this template, choose Tools | Templates * and open the template in the editor. */ /** * * @author HEDAHDIA */ import java.io.* ; import java.util.Vector; import javax.servlet.http.* ; public class PipelineServletA extends HttpServlet { private Vector Tab1,Res1; private Object receiveObject( HttpServletRequest req ) throws Exception { ObjectInputStream in = new ObjectInputStream( req.getInputStream() ); Object obj = in.readObject(); in.close(); return obj ; } private void sendObject( HttpServletResponse resp , Object obj ) throws Exception { ObjectOutputStream out = new ObjectOutputStream( resp.getOutputStream() ); out.writeObject( obj ); out.close(); } public void doPost( HttpServletRequest req , HttpServletResponse resp ) { int i = 0; try { Object obj = receiveObject( req ) ; // reverse the String. Tab1 = (Vector)obj; while(Tab1.size()== i){ String old = (String) Tab1.elementAt(i); String s =""; for( int j = old.length() - 1 ; j >= 0 ; j-- ) { s += old.charAt( j ); } Res1.add(i, s); i++; } sendObject( resp , Res1 ); } catch ( Exception e ){ System.out.println( "Clang! Thunk: " + e ); } } } et l'erreur qu'il m'affche: java.io.FileNotFoundException: http://localhost:8080/monprojet/maservlet.