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Applet Servlet Communication

1 reply on 1 page. Most recent reply: May 25, 2006 11:27 PM by nagasrikanth chalasani

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Nagesh Dudam

Posts: 2
Nickname: dnagesh
Registered: May, 2006

Applet Servlet Communication

Posted: May 24, 2006 4:54 AM

Hello Everybody,
I want to communicate to the servlet via applet...
From Applet I want to call Servlet with one parameter using get method..

I have written all the code but I am not getting any output from it. please help me...its very urgent please...

Below is the code... there are 3 files placed at..
1) C:\Tomcat 5.5\webapps\ROOT\MyHtml.html
2) C:\Tomcat 5.5\webapps\ROOT\MyApplet.java
3) C:\Tomcat 5.5\webapps\ROOT\WEB-INF\classes\MyServlet.java

1)MyHtml.html

<HTML> <HEAD> <TITLE>Hello!</TITLE> </HEAD> <BODY> <P>
<APPLET CODE=MyApplet.class WIDTH=200 HEIGHT=50> </APPLET>
</BODY> </HTML>

2)MyApplet.java

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

import java.util.*;
import java.io.*;
import java.net.*;
import java.net.URLConnection.*;

public class MyApplet extends Applet
{
public String s1;
public String location;

public void init()
{
try
{
location = "http://localhost:8080/WEB-INF/classes/MyServlet?UserOption=AppletDisplay";
URL testServlet = new URL( location );
System.out.println("testServlet= "+testServlet);
URLConnection servletConnection = testServlet.openConnection();
ObjectInputStream inputFromServlet = null;
inputFromServlet = new ObjectInputStream(servletConnection.getInputStream());

s1 = (String) inputFromServlet.readObject();
s1="nagesh";
}
catch(Exception e)
{ }

}
public void paint(Graphics g)
{
g.drawString(location,10,10);
}

}

3)MyServlet.java

import javax.servlet.*;
import javax.servlet.http.*;

import java.io.*;

import java.util.*;

public class MyServlet extends HttpServlet
{

public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
ObjectInputStream inputFromApplet = null;
//Student aStudent = null;
PrintWriter out = null;
BufferedReader inTest = null;

try
{ }
catch (Exception e)
{ }
}

public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
System.out.println("in doGet(...)");

String userOption = null;

userOption = request.getParameterValues("UserOption")[0];

System.out.println("userOption == " + userOption);

ObjectOutputStream outputToApplet;

try
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();

out.println("<html><head><title> HCL InfoWall"+ userOption +" </title></head></html>");
}
catch (IOException e)
{
e.printStackTrace();
}
}
}

nagasrikanth chalasani

Posts: 3
Nickname: cnsrikanth
Registered: May, 2006

Re: Applet Servlet Communication

Posted: May 25, 2006 11:27 PM

http://localhost:8080/WEB-INF/classes/MyServlet?UserOption=AppletDisplay

Check this in the IE, does this work?

I am shure this will not work.

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