如何使用kxml解析WAP

import java.io.*;
   
   import org.kxml.*;
   import org.kxml.parser.*;
   import org.kxml.wap.*;
   
   import javax.microedition.lcdui.*;
   import javax.microedition.midlet.*;
   import javax.microedition.io.*;
   
   public class WbxmlTest extends MIDlet implements CommandListener
   {
   PRivate Display display = null;
   private List menu = null; 
   private Form form = null;
   private String incomingText = "";
   
   static final Command okCommand   
      = new Command("Ok",     Command.OK,     1);
   static final Command exitCommand 
      = new Command("Exit",   Command.EXIT,   0);
    
   // This is a hard coded WSP message that contains
   // address of web server where  our jsp page is located.
   byte[] message ={
      (byte)'1',(byte)0x40,(byte)0x3D,(byte)'h',(byte)'t',
      (byte)'t',(byte)'p',(byte)':',(byte)'/',(byte)'/',
      (byte)'l',(byte)'o',(byte)'c',(byte)'a',(byte)'l',
      (byte)'h',(byte)'o',(byte)'s',(byte)'t',(byte)':',
      (byte)'8',(byte)'0',(byte)'8',(byte)'0',(byte)'/',
      (byte)'e',(byte)'x',(byte)'a',(byte)'m',(byte)'p',
      (byte)'l',(byte)'e',(byte)'s',(byte)'/',(byte)'j',
      (byte)'s',(byte)'p',(byte)'/',(byte)'f',(byte)'i',
      (byte)'n',(byte)'a',(byte)'l',(byte)'f',(byte)'i',
      (byte)'l',(byte)'e',(byte)'s',(byte)'/',(byte)'D',
      (byte)'a',(byte)'t',(byte)'.',(byte)'j',(byte)'s',
      (byte)'p',(byte)0x80,(byte)0x94,(byte)0x88,(byte)0x81,
      (byte)0x6A,(byte)0x04,(byte)0x83,(byte)0x99
               };   
   // Memory space to receive message.
   byte[] msg = new byte [256];
    
   
   public void pauseApp() { /* ----- */ }
   
   
   public void destroyApp(boolean unconditional) 
   { notifyDestroyed(); }
   
      
   public void startApp() {
      display = Display.getDisplay(this);
      this.mainMenu();
   }//startApp
   
   
   //Displays the menu screen
   private void mainMenu() {
      menu = new List(" Send Request", Choice.IMPLICIT);
      menu.append(" Send Message",null);
      menu.addCommand(okCommand);
      menu.setCommandListener(this);
      display.setCurrent(menu);
   }//mainMenu
   
   
   //Display the reply from WAPGateway (JWap).
   private void showReply()   {
      form = new Form( "Incoming Message" );
      form.append("The price = " + incomingText);
      form.addCommand(exitCommand);
      form.setCommandListener(this);
      display.setCurrent(form);
   }//showReply
   
   
   // Makes a WSP Connection with a WAPGateway,
   // Sends a message and receives the reply.
   public void getConnect() {
      Datagram dgram =null;
      DatagramConnection dc=null;
      try   {
         dc = (DatagramConnection)Connector.open ("datagram://127.0.0.1:9200");
         dgram = dc.newDatagram(message, message.length);
           try{
            dc.send(dgram);}
         catch (InterruptedIOException e){ 
            e.printStackTrace(); }
         
           dgram = dc.newDatagram (msg,msg.length);
           try{
            dc.receive(dgram);}
         catch (InterruptedIOException e){ 
            e.printStackTrace();}
         catch( IOException e){
            e.printStackTrace();}
   
         // This is the most interesting part.
         incomingText = this.getIncomingTextOfWmlc(dgram.getData());
         this.showReply();
           dc.close();
       }//try
      catch (IllegalArgumentException ie){
         ie.printStackTrace(); }
      catch (ConnectionNotFoundException cnf){   
         cnf.printStackTrace();   }
      catch (IOException e){e.printStackTrace();}
    }//getConnect() 
   
   
    private String getIncomingTextOfWmlc ( byte[] wmlc ) {
    try {
      // Remove WSP header.
      // We know it is 19 bytes for our case.
      // But for real world applications,
      // this should be dynamically deteced.
   
      for ( int j = 0; j < wmlc.length-19; j++ )
                 wmlc[j] = wmlc[j+19];
           
      WmlParser parser = new WmlParser(new ByteArrayInputStream(wmlc));
      while (true) {
              try {
                 ParseEvent parseEvent = parser.read();
                 if ( parseEvent.getType() == Xml.START_TAG ) {
                    Attribute attr = 
                parseEvent.getAttribute("value");
                    if ( attr != null )
                       return attr.getValue();
                 }//if
              }//try
      catch ( IOException e) {}
      }//while
          }//try
      catch ( IOException e) { e.printStackTrace();   } 
      return "error";
   }//getIncomingTextOfWmlc 
   
   public void commandAction(Command c, Displayable d) {
      String commandlabel = c.getLabel();
       if (commandlabel.equals("Exit")) 
            destroyApp(false);
      else if (commandlabel.equals("Ok")) 
            getConnect();
   }//commandAction
   }//class WbxmlTest

<?xml version="1.0"?>
   <!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN" "http://www.wapforum.org/DTD/wml_1.1.xml">
   <%@ page language="java" contentType= "text/vnd.wap.wml" %>
   
   <wml>
     <card id="c0" newcontext="false" ordered="false">
    <input type="Price" value="15224" emptyok="false"/>
     </card>
   </wml>