Passing values from Servlet to my JSP

Question

I need to pass the String value h from Servlet to the jsp page. If login is success it will be redirected to success page else it need to display "Invalid login message" in login.jsp page

    if(success)
    {
        RequestDispatcher view=getServletContext().getRequestDispatcher("/Success.html");
        view.forward(request, response);
    }
    else
    {
        String h="Invalid Login";
        RequestDispatcher view=getServletContext().getRequestDispatcher("/Login.jsp");
        view.forward(request, response);
    }

I tried a lot, but its not working.

You tried "a lot"? Like what did you try? Did you try setting it as a request attribute? That's the standard approach. — Dave Newton, Apr 30 '13 at 13:12
yeah i tried in .jsp page as <%=request.getAttribute("h")%>.. am i wrong..? — Bright, Apr 30 '13 at 13:15
yes, you are wrong, because you didn't set any attribute named "h". see the answer bellow! — Sazzadur Rahaman, Apr 30 '13 at 13:23
you can also use the session to store information on... `reguest.getSession().setAttribute("Attribute","Value");` and in jsp use `value = session.getAttribute("Attribute").toString();` — MaVRoSCy, Apr 30 '13 at 13:23
As a side note, related to your `<%=request.getAttribute("h")%>`. Read here: [The use of scriptlets is highly discouraged](http://stackoverflow.com/a/3180202/814702) — informatik01, Apr 30 '13 at 18:52
Servlet: boolean success=s.Login(d); if(success){ RequestDispatcher view=getServletContext().getRequestDispatcher("/Success.html"); view.forward(request, response); } else { message="Invalid Password"; request.setAttribute("message", message); RequestDispatcher view=getServletContext().getRequestDispatcher("/Login.jsp"); view.forward(request, response); } Jsp: <%=request.getAttribute("message")%> ... Its showing null at the jsp before clicking submit button and i need to clear this null.. Help pls — Bright, May 01 '13 at 13:42

score 2 · Answer 1 · answered Apr 30 '13 at 13:21

Your else block will be like bellow:

else
{
   String h="Invalid Login";
   request.setAttibute("message",h);
   RequestDispatcher view=getServletContext().getRequestDispatcher("/Login.jsp");
   view.forward(request, response);
}

And in your Login.jsp file you should use:

${message}  //(El expression to access value)

And your message will be displayed.

score 0 · Answer 2 · answered Apr 30 '13 at 13:16

0

Try to store your data in some scope

In servlet

   request.setAttribute("Data", h);

in jsp

request.getAttribute("Data")

answered Apr 30 '13 at 13:16

user2302288

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score 0 · Answer 3 · edited Aug 22 '13 at 11:15

You can store your data either in request or in session.Then access that value from your jsp page by using sessionScope or simply ${data}.

You can set values in request or session by using the code below in your Servlet.

request.setAttribute("data",h);
request.getSession.setAttribute("data",h);

In order to access this value in your jsp page. Add the below code in your jsp page

${data} //if you are storing data in request
${sessionScope.data} //If you are storing data in Session

Passing values from Servlet to my JSP

3 Answers3