transfert des fichier avec les socket

salut a tout le monde
bon mon problème est que j'ai fait une application java client serveur il fonctionne bien avec les messages simple mais pour transférer des fichier il ne fonctionne pas ,
voila le serveur :

Code:

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package serveur;
 
/**
 *
 * @author Taima-info
 */
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.*;
import java.io .*;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class Serveur extends JFrame implements ActionListener{
    public static final int BUFFER_SIZE =4096;
    int port;
    boolean etat=true;
    Socket s;
    ServerSocket sv;
    JButton b;
    JTextField txtF;
    JComboBox comB1;
    JTextArea txtA;
    JButton b1;
    JPanel pan;
    JScrollPane sc;
    File f=null;
    public Serveur(){
 
    	this.setTitle("serveur");
        this.setBounds(0,0,300,400);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLocation(100,100);
        this.setLayout(null);
        pan=new JPanel();
        pan.setLayout(null);
        pan.setBounds(0,0,this.getWidth(),this.getHeight());
        pan.setBackground(Color.GREEN);
        b=new JButton("envoie");
        b.setBounds(100,320,100, 30);
        b1=new JButton("Add File");
        b1.setBounds(150,280,100, 30);
        b1.addActionListener(new ActionListener() {
 
            @Override
            public void actionPerformed(ActionEvent e) {
                f=null;
                JFileChooser file=new JFileChooser();
                file.showOpenDialog(null);
                f=file.getSelectedFile();
                //txtF.setText(f.toString());
            }
        });
        txtF=new JTextField();
        comB1=new JComboBox();
        txtF.setBounds(10, 280, 130, 30);
        comB1.setBounds(50, 10, 200, 30);        
        txtA=new JTextArea();
        sc=new JScrollPane(txtA);
        sc.setBounds(20,50,242,220);
        pan.add(b) ;
        pan.add(b1) ;
        pan.add(txtF);
        pan.add(comB1);
        pan.add(sc) ; 
        this.add(pan);
        this.setVisible(true);
        b.addActionListener(this);
 
 
        try {
            if(!txtF.getText().equalsIgnoreCase(null)){
	        sv = new ServerSocket(22000);
//                JOptionPane.showConfirmDialog(new JFrame(), "", "", JOptionPane.OK_OPTION);
	        while (etat) { 
                    System.out.println("Serveur lancé!");
		    Socket sok =sv.accept();
                    BufferedReader in = new BufferedReader( new InputStreamReader(sok.getInputStream()));
 
                    // c'est la l'ajout des choses
                    BufferedInputStream bis =new BufferedInputStream(sok.getInputStream());
                    BufferedOutputStream bos =new BufferedOutputStream( new FileOutputStream( new File("d://f.txt")));
                    byte buf[] =new byte[Serveur.BUFFER_SIZE];
                    while(bis.read(buf) !=-1){
			bos.write(buf);
			bos.flush();
		    }
                    bos.close();
		    bis.close();
                    sv.close();
		    sok.close();
		    System.out.println("Fichier réceptionné !\n\n");
 
	            String message = in.readLine(); 
	            txtA.append("client dit :"+message+"\n");               
              if(this.isVisible())
              {
                 etat=true;
              }else{
                 etat=false;
              }
	   }
          }
	} catch (Exception e) {
      }	 
   }
 
    @Override
    public void actionPerformed(ActionEvent arg0) {
	       try {  
 
   	         Socket sock= new Socket("127.0.0.1",80);
   	         PrintStream out = new PrintStream(sock.getOutputStream());
                 if(f!=null){
                     out.println(f);
                 }else{
                 out.println(""+txtF.getText());
                 }
                 sock.close();   
 
   	       } catch (Exception e) {
   	      }
	  }
}

et voila le client :

Code:

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package client;
 
/**
 *
 * @author Taima-info
 */
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.*;
import java.io .*;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
public class Client extends JFrame implements ActionListener{
    int port;
    boolean etat=true;
    Socket s;
    ServerSocket sv;
    JButton b;
    JTextField txtF;
    JComboBox comB1;
    JTextArea txtA;
    JButton b1;
    JPanel pan;
    JScrollPane sc;
    File f=null;
    public Client(){
 
    	this.setTitle("serveur");
        this.setBounds(0,0,300,400);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLocation(100,100);
        this.setLayout(null);
        pan=new JPanel();
        pan.setLayout(null);
        pan.setBounds(0,0,this.getWidth(),this.getHeight());
        pan.setBackground(Color.GREEN);
        b=new JButton("envoie");
        b.setBounds(100,320,100, 30);
        b1=new JButton("Add File");
        b1.setBounds(150,280,100, 30);
        b1.addActionListener(new ActionListener() {
 
            @Override
            public void actionPerformed(ActionEvent e) {
                f=null;
                JFileChooser file=new JFileChooser();
                file.showOpenDialog(null);
                f=file.getSelectedFile();
                //txtF.setText(f.toString());
            }
        });
        txtF=new JTextField();
        comB1=new JComboBox();
        txtF.setBounds(10, 280, 130, 30);
        comB1.setBounds(50, 10, 200, 30);        
        txtA=new JTextArea();
        sc=new JScrollPane(txtA);
        sc.setBounds(20,50,242,220);
        pan.add(b) ;
        pan.add(b1) ;
        pan.add(txtF);
        pan.add(comB1);
        pan.add(sc) ; 
        this.add(pan);
        this.setVisible(true);
        b.addActionListener(this);
 
 
        try {
            //if(!txtF.getText().equalsIgnoreCase(null)){
	        sv = new ServerSocket(80);
//                JOptionPane.showConfirmDialog(new JFrame(), "", "", JOptionPane.OK_OPTION);
	        while (etat) {              
	            Socket sok = sv.accept();
	            BufferedReader in = new BufferedReader( new InputStreamReader(sok.getInputStream()));
	            String message = in.readLine(); 
	            txtA.append("client dit :"+message+"\n");               
              if(this.isVisible())
              {
                 etat=true;
              }else{
                 etat=false;
              }
	   }
         // }
	} catch (Exception e) {
      }	 
   }
 
    @Override
    public void actionPerformed(ActionEvent arg0) {
	       BufferedInputStream bis =null;
               try { 
                 bis =new BufferedInputStream(new FileInputStream(new File("s.avi")));
                 Socket sock= new Socket("127.0.0.1",8080);
                 BufferedOutputStream bos =new BufferedOutputStream(sock.getOutputStream());
 
                 PrintStream out = new PrintStream(sock.getOutputStream());
                 if(f!=null){
                     out.println(f);
                 }else{
                 out.println(""+txtF.getText());
                 }
                 sock.close();   
 
   	       } catch (Exception e) {
   	      }
	  }
}

moi je veut faire l’application transféré aussi des fichier pas des message simple stt
et merci d'avance .