Graphic User Interface in Soap Client

[Winston Lee <yi...@yahoo.com>]

Hi, 

I tried to use JApplet as client side User Graphic Interface, when I 
used the soap method in the applet, there is an org/apache/rpcmessage 
error. Then, I tried to use JFrame to replace it.

Here is my code, there is still a nullpointerError. Some one can help 
me or tell me some useful example links, or code?

 I also tried to run soap-2_3/sample/bidbuy example, this is the only 
GUI example I could find. When I ran it, there are always errors.

I know someone can help me  

// TestActionEvent.java: Test ActionEvent
package myframe.test;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import org.apache.soap.Constants;
import org.apache.soap.SOAPException;
import org.apache.soap.Envelope;
import org.apache.soap.Fault;
import org.apache.soap.rpc.Call;
import org.apache.soap.rpc.Response;
import org.apache.soap.rpc.Parameter;

public class TestActionEvent extends JFrame
  implements ActionListener
{
  // Create two buttons
  private JButton jbtOk = new JButton("OK");
  private JButton jbtCancel = new JButton("Cancel");

  HelloWorldClient hello;

 /**Default constructor*/
  public TestActionEvent()
  {
    // Set the window title
    setTitle("TestActionEvent");

    // Set FlowLayout manager to arrange the components
    // inside the frame
    getContentPane().setLayout(new FlowLayout());

    // Add buttons to the frame
    getContentPane().add(jbtOk);
    getContentPane().add(jbtCancel);

    // Register listeners
    jbtOk.addActionListener(this);
    jbtCancel.addActionListener(this);
  }

  public String sendBack(){
   return "Hello Wei Li!";
   }

  /**Main method*/
  public static void main(String[] args)
  {
    TestActionEvent frame = new TestActionEvent();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(300, 200);
    frame.setVisible(true);
  }

  /**This method will be invoked when a button is clicked*/
  public void actionPerformed(ActionEvent e)
  {
    if (e.getSource() == jbtOk)
    {
     try{
     hello.caller = "You are a good guy !";
      hello.receiver = hello.getSoap( hello.caller );
      System.out.println("This is" + hello.receiver );
  }catch(Exception eee){
   System.err.println("first----" + eee );

   }
    }
    else if (e.getSource() == jbtCancel)
    {
 try{
   hello.caller = "You are a bad guy !";
   hello.receiver = hello.getSoap( hello.caller );
      System.out.println("This is not" + hello.receiver );
      }catch(Exception eee){
      System.err.println("Second-----" + eee );

   }
    }
  }
}


package myframe.test;

import java.net.URL;
import java.util.Vector;
import java.util.Arrays;

import org.apache.soap.Constants;
import org.apache.soap.SOAPException;
import org.apache.soap.Envelope;
import org.apache.soap.Fault;
import org.apache.soap.rpc.Call;
import org.apache.soap.rpc.Response;
import org.apache.soap.rpc.Parameter;


public class HelloWorldClient {
   static String caller;
   static String receiver;

    public String getSoap(String args) throws Exception {
    String methodName = "com.lesavon.test.HelloWorldClient.main";
    String url = "http://localhost:8080/HelloWorld/rpcrouter";
    String uri = "urn:helloworld";   // must match HelloWorld.xml
    String remoteMethod = "getMessage";
 TestActionEvent event = new TestActionEvent();

 receiver = args;
      Call call = new Call();
      caller = event.sendBack();
      Parameter param = new Parameter("caller", caller.getClass(), 
caller,
                                      Constants.NS_URI_SOAP_ENC);

      call.setTargetObjectURI(uri);
      call.setMethodName(remoteMethod);
      call.setParams(new Vector(Arrays.asList(new Parameter[] {
        param
      })));

      Response resp = call.invoke(new URL(url), "");

      // Check the response.
      if (resp.generatedFault()) {
        Fault fault = resp.getFault();
  throw new SOAPException(fault.getFaultCode(),fault.getFaultString());
      } else {
        //if (resp.getReturnValue() != null) {
          Object result = resp.getReturnValue().getValue();
          return (String)result;
        //}
      }
    }
}







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