Can I use object in JSP which is created in servlet?

[Dave Thunder]

How should I access object, which I have created in servlet?

Servlet handles the requests(controller) and forwards to requested jsp page.
Some of the jsp pages need EJB objects. When i create an ejb object in servlet and then forward the request to jsp, how can i access the object in jsp ?

This should be MVC - based application, like JSP-Servlet-EJB.

Thanks!
[ December 07, 2005: Message edited by: Dave Thunder ]

[William Brogden]

You can attach any reference to the request - see the JavaDocs for javax.servlet.ServletRequest - specifically setAttribute and getAttribute.
Bill

[Dave Thunder]

Problems again.

SERVLET :

 
//request.setAttribute("FunktsioonidBean",arvutus);
request.setAttribute("atribuut","v22rtus");


RequestDispatcher disp = getServletContext().getRequestDispatcher("/" + forward);
disp.forward(request,response);

JSP :

%@ page language="java" %>
 
Registreerimine.
<br />
<%
   String s = (String)request.getAttribute("atribuut");
%>
<%= s%>

Getting NULL. Should be correct or what ?
EDIT : I just don't get it. Do I have to import anything to jsp to use request.getAttribute() ? I think no...

[ December 07, 2005: Message edited by: Dave Thunder ]
[ December 07, 2005: Message edited by: Dave Thunder ]

[sudhir kamath]

first check whether you are directed to you jsp you are pointing.if you are able to direct it you should be able to get it.

regards,
sudhir.

[Bear Bibeault]

This should be a straight-forward procedure. We can't tell much from the code you've posted. Are you forwarding directly to the JSP?

[Dave Thunder]

Well, forwarding should be ok.

And when I set my values in session for example, I can get them in jsp.
I don't know. Maybe I will use session instead of request for setting attributes.

[Bear Bibeault]

Originally posted by Dave Thunder:
I don't know. Maybe I will use session instead of request for setting attributes.

Bad idea. Finding out why this very simple and common operation is not working for you is the best approach.

Need more info on how you are forwarding to the JSP page.

[Dave Thunder]

Whole servlet :

package pakk1;
 
import java.io.*;
import javax.servlet.http.*;
import javax.servlet.*;
 
public class Kontroller extends HttpServlet {
  /**
 * 
 */
private static final long serialVersionUID = 1L;
 
public void doGet (HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException
  {
    String forwardTo;
int id = 0;
    
    
    if(request.getParameter("id") != null)
    {
    id = Integer.parseInt(request.getParameter("id"));
    }

    switch (id)
    {
    case 0  : 
    {
    forwardTo = "/error.jsp";
    request.setAttribute("nimi","value");
    break;
    }
    default : forwardTo = "/tere.jsp"; 
    }
    

    RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(forwardTo);
    dispatcher.forward(request, response);
       
  }
}

[ December 09, 2005: Message edited by: Dave Thunder ]
[ December 09, 2005: Message edited by: Dave Thunder ]

[Paul Clapham]

You're only setting the request attribute when you forward to the error.jsp page. When you forward to the tere.jsp page you aren't setting any request attributes. Was your problem with the error.jsp?

[Dave Thunder]

Yes, my problem is with error.jsp here. I only set attributes here for one case, it is for trying.
But it is correct, right? Should be.

And here is error.jsp :

<%= (String)session.getAttribute("nimi")%>

[ December 11, 2005: Message edited by: Dave Thunder ]

[Dave Thunder]

This is some kind of mystics.

[Taras Tovstenko]

Hi.
I found the bug!
when you're putting your object as request attribute you use something like this:
request.setAttribute("name", new Object);

in your JSP when you trying to get attribute you use:
<%= (String)session.getAttribute("nimi")%>
rewrite that part of code to something like this:
<%= (String)request.getAttribute("nimi")%>