Hello all,
I try to write a applet to invoke a servlet, but I failed, I don't
know where I make mistake, here is my source code, feom message box,it
shows IOException-2, please tell me my mistakes.
Thanks in advance.
*********************************************************
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class My2Servlet extends HttpServlet
{
public void service (HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
try
{
ObjectInputStream in=new
ObjectInputStream(request.getInputStream());
ObjectOutputStream out=new
ObjectOutputStream(response.getOutputStream());
String data=(String)in.readObject();
in.close();
if (data==null)
{
System.out.println("data not trans into
servlet");
out.writeObject(new String("error"));
}
else
{
System.out.println("data trans to servlet OK");
out.writeObject(data);
}
out.close();
}catch (IOException e)
{
System.out.println("server side IOException");
}catch (ClassNotFoundException ce)
{
System.out.println("convert string error");
}
}
}
***********************************************************************
applet's method:
***********************************************************************
void button1_ActionPerformed(java.awt.event.ActionEvent event)
{
// to do: code goes here.
String data=null;
String message=new String("new message");
InetAddress localHost=null;
String localHostAddress=null;
try
{
localHost=InetAddress.getLocalHost();
localHostAddress=localHost.getHostAddress();
} catch (UnknownHostException e)
{
System.out.println("local host not found");
}
URL url=null;
URLConnection con=null;
try
{
url=new URL("http://"+localHostAddress+"/servlet/My2Servlet");
con=url.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
ObjectOutputStream out=new ObjectOutputStream(con.getOutputStream());
out.writeObject(message);
out.close();
}catch (MalformedURLException me)
{
System.out.println("MalformedURLException");
}catch (IOException e)
{
System.out.println("IOException");
}
try{
ObjectInputStream in=new ObjectInputStream(con.getInputStream());
data=(String)in.readObject();
in.close();
}catch (MalformedURLException me)
{
System.out.println("MalformedURLException-2");
}catch (IOException e)
{
System.out.println("IOException-2");
}
catch (ClassNotFoundException ce)
{
System.out.println("convert string error");
}
button1.setLabel(data);
}
*******************************************************
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DragonTown mailto:[EMAIL PROTECTED]
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