Appeler une servlet à partir d'un projet J2ME

Svp parsonne n'a uune idée???
Voila ma servlet

Code:

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package test;
 
import java.io.*;
//import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
 
 
public class listcmd extends HttpServlet {
	private static final long serialVersionUID = 1L;
 
	private Open open=new Open();
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
 
        out.close();
    }
 
 
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {
		BufferedReader br = request.getReader();
		 String buf ="";
		 buf=br.readLine();
		open.authentif(buf);
 
		        processRequest(request, response);
	}
 
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
         response.setContentType("text/plain");
        PrintWriter out = response.getWriter();
        BufferedReader br = request.getReader();
        //BufferedReader brr = request.getReader();
 
       String buf ="";
       String buf2 ="";
       buf=br.readLine();
       //buf=brr.readLine();
       try{
    	   System.out.println("hello");
    	   System.out.println(buf);
 
             if(buf!=null ){
            	if (buf.contains("login")){
 
            		  String r="";
            		  r=open.authentif(buf);
            		  out.flush();
            		  out.print(r);
            		  System.out.print(r);
            	  }  catch(NullPointerException ex){
          out.print("");
        }
 
 
    }
 
 
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
	throws IOException, ServletException{
 
 
 
	}
 
 
    public String getServletInfo() {
        return "Short description";
    }
    // </editor-fold>
}

qui verifie la validité du mot de passe.
j'ai essayé de l'appeler depuis j2me j'ai essayé tout d'abord d'appeler la methode doPost mais le buffer ne se charge pas et aussi la méme chose pour la methode doGet, Dans le fichier log de tomcat je trouve qu'il se connecte à la servlet et il m'affiche les println que j'ai mis dans la servlet mais lorsque je met le buffer dans println il me retourne null
voila le code j2me:

Code:

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package hello;
 
 
import javax.microedition.io.*;
import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
 
 
public class Connection extends MIDlet implements CommandListener {
   private Display display;
   private TextField userName;
   private TextField password;
   private Form form;
   private Command cancel;
   private Command login;
   String url = "http://localhost:8082/mobile/listcmd";
   static final Command backCommand = new Command("Back", Command.BACK, 0);
 
   public Connection() {
      userName = new TextField("LoginID:", "", 10, TextField.ANY);
      password = new TextField("Password:", "", 10, TextField.PASSWORD);
      form = new Form("Sign in");
      cancel = new Command("Cancel", Command.CANCEL, 2);
      login = new Command("Login", Command.OK, 2);
    }
   private String Rep="";
   private String Req="";
 
 
   public void startApp() {
      display = Display.getDisplay(this);
      form.append(userName);
      form.append(password);
      form.addCommand(cancel);
      form.addCommand(login);
      form.setCommandListener(this);
      display.setCurrent(form);
   }
 
   public void pauseApp() {
   }
 
   public void destroyApp(boolean unconditional) {
      notifyDestroyed();
   }
 
 
   public void menu() {
     List services = new List("Choose one", Choice.EXCLUSIVE);
     services.append("Check Mail", null);
     services.append("Compose", null);
     services.append("Addresses", null);
     services.append("Options", null);
     services.append("Sign Out", null);
     display.setCurrent(services);
   }
 
   public void tryAgain() {
     Alert error = new Alert("Login Incorrect", "Please try again", null, AlertType.ERROR);
     error.setTimeout(Alert.FOREVER);
     userName.setString("");
     password.setString("");
     display.setCurrent(error, form);
   }
 
   public void commandAction(Command c, Displayable d) {
      String label = c.getLabel();
      if(label.equals("Cancel")) {
        destroyApp(true);
      } else if(label.equals("Login")) {
            try {
                 Req=password.getString();
                 invokeServlet(Req);
 
          } catch (IOException ex) {
 
          }
 
      }
   }
 
   void invokeServlet(String Req) throws IOException {
      HttpConnection c = null;
      InputStream is = null;
      OutputStream os = null;
      StringBuffer b = new StringBuffer();
      TextBox t = null;
      try {
         c = (HttpConnection)Connector.open(url);
         c.setRequestMethod(HttpConnection.POST);
         c.setRequestProperty("CONTENT-TYPE","application/x-www-form-urlencoded");
         c.setRequestProperty("User-Agent","Profile/MIDP-1.0 Confirguration/CLDC-1.0");
         c.setRequestProperty("Content-Language", "en-CA");
 
         os = c.openOutputStream();
 
        byte postmsg[] = Req.getBytes();
 
                 for(int i=0;i<postmsg.length;i++) {
 
                     os.write(postmsg[i]);
                     System.out.println(postmsg[i]);
                }
 
 
 
         os.flush();
 
         is = c.openDataInputStream();
         int ch;
         while ((ch = is.read()) != -1) {
            b.append((char) ch);
 
         }
        Rep=b.toString();
           System.out.println(" reponse: "+Rep);
 
           //Req="";
 
      }catch (IOException excep) {
        System.out.println(excep.getMessage());
      }
      finally {
         if(is!= null) {
            is.close();
         }
         if(os != null) {
            os.close();
         }
         if(c != null) {
            c.close();
         }
      }
      display.setCurrent(t);
   }
 
}

SVP j'ai besoin d'aide:cry: