Bonjour,

J'essai de me connecter avec une connection telnet a un switch h3c mais j'ai une erreur et je ne vois pas de quoi cela vien

voici mon code

Code : Sélectionner tout - Visualiser dans une fenêtre à part
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package ubpackage;
 
import java.lang.*;
import java.util.*;
import java.util.Date;
import java.util.Locale;
import java.text.SimpleDateFormat;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.io.PrintWriter;
import javax.servlet.*;
import javax.servlet.ServletException;
import java.net.SocketException;
import javax.servlet.http.*;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.*;			// API SQL
import com.novell.ldap.*;		// API LDAP
import java.io.InputStream;		// Toutes les API pour le script "Cisco"
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.FileOutputStream;
import org.apache.commons.net.telnet.TelnetClient;
import org.apache.commons.net.telnet.TelnetNotificationHandler;
import org.apache.commons.net.telnet.SimpleOptionHandler;
import org.apache.commons.net.telnet.EchoOptionHandler;
import org.apache.commons.net.telnet.TerminalTypeOptionHandler;
import org.apache.commons.net.telnet.SuppressGAOptionHandler;
import org.apache.commons.net.telnet.InvalidTelnetOptionException;
import java.util.StringTokenizer;
import org.apache.commons.net.telnet.*;
import java.io.*;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.*;
import java.net.JarURLConnection;
 
 
 
 
public class telnet extends HttpServlet{
 
 
	  private TelnetClient telneto = new TelnetClient();
	  private InputStream in;
	  private PrintStream out;
	  private char prompt = '$';
 
	  public telnet( String server, String user, String password ) {
	   try {
		 // Connect to the specified server
		 telneto.connect( server, 23 );
 
		 // Get input and output stream references
		 in = telneto.getInputStream();
		 out = new PrintStream( telneto.getOutputStream() );
 
		 // Log the user on
		 readUntil( "login: " );
		 write( user );
		 readUntil( "Password: " );
		 write( password );
 
		 // Advance to a prompt
		 readUntil( prompt + " " );
	   }
	   catch( Exception e ) {
		 e.printStackTrace();
	   }
	  }
 
	  public void su( String password ) {
	    try {
	      write( "su" );
	      readUntil( "Password: " );
	      write( password );
	      prompt = '#';
	      readUntil( prompt + " " );
	    }
	    catch( Exception e ) {
	      e.printStackTrace();
	    }
	  }
 
	  public String readUntil( String pattern ) {
	   try {
		 char lastChar = pattern.charAt( pattern.length() - 1 );
		 StringBuffer sb = new StringBuffer();
		 boolean found = false;
		 char ch = ( char )in.read();
		 while( true ) {
		  System.out.print( ch );
		  sb.append( ch );
		  if( ch == lastChar ) {
		    if( sb.toString().endsWith( pattern ) ) {
			 return sb.toString();
		    }
		  }
		  ch = ( char )in.read();
		 }
	   }
	   catch( Exception e ) {
		 e.printStackTrace();
	   }
	   return null;
	  }
 
	  public void write( String value ) {
	   try {
		 out.println( value );
		 out.flush();
		 System.out.println( value );
	   }
	   catch( Exception e ) {
		 e.printStackTrace();
	   }
	  }
 
	  public String sendCommand( String command ) {
	   try {
		 write( command );
		 return readUntil( prompt + " " );
	   }
	   catch( Exception e ) {
		 e.printStackTrace();
	   }
	   return null;
	  }
 
	  public void disconnect() {
	   try {
		 telneto.disconnect();
	   }
	   catch( Exception e ) {
		 e.printStackTrace();
	   }
	  }
 
 
		  public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException 
			{  
			  try {
				  response.setContentType("text/html");
					PrintWriter out = response.getWriter();
					out.println("<html>");
					out.println("<head><title></title></head>");
					out.println("<body>");
 
				 telnet telneto = new telnet("10.247.112.220","log","pass");
				 telneto.sendCommand("display current-configuration"); 
				 telneto.disconnect();
				 out.println("</center></body></html>");
			   }
			   catch( Exception e ) {
				 e.printStackTrace();
			   }
 
			}
		  public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
		  	{
			      doGet(request, response);
			}
 
 
}
et mon erreur

org.apache.catalina.valves.errorreportvalve.invoke(errorrepportvalve.java:10)