Hi - I am trying to call a servlet from a jsp page to perfrom a simple
server-side include.
I can successfully call the servlet, but any parameters I pass do not seem to
make it into the servlet.
I would like to use the following:
<jsp:include page="/servlet/UIService?request_type=blank_dropdown"
flush="true"/>
This successfully calls the servlet, but the parameter passed in the url to the
servlet are 'lost'... ie they don't seem to get passed into the servlet - if I
try to do a request.getParameter("request_type"), it returns null.
(If I call the servlet directly via a URL in my browser it works ok)
I have also tried using the RequestDispather form my jsp code to do the same:
<%
RequestDispatcher dispatcher =
application.getRequestDispatcher("/servlet/UIService");
request.setAttribute("request_type", "blank_dropdown");
dispatcher.include(request, response);
%>
- but the same happens here too.
Heres the body of my servlet:
import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class UIService extends HttpServlet
{
public void init(ServletConfig cfg)
throws ServletException
{
}//end init()
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
String sRequest = req.getParameter("request_type");
//output test back to client
res.setContentType("text/html");
PrintWriter out = res.getWriter();
try
{
out.println("<!--generated output from servlet-->");
if(sRequest != null)
{
if(sRequest.equals("blank_dropdown"))
{
out.println("<select><option></option></select>");
}
if(sRequest.equals("dummy_asset_dropdown"))
{
out.println("<select><option>Asset type 1</option>");
out.println("<option>Asset type 2</option></select>");
}
if(sRequest.equals("get_dropdown_data"))
{
//testing only
out.println("<!-- request_type: get_dropdown_data
-->");
//call db_servlet
//return to calling jsp page
}
out.println("<!--end generated output from servlet-->");
out.flush();
//out.close();
}//end if
else
{
out.println("<!-- request_type is null -->");
}
}//end try
catch(Exception e)
{
out.println("<hr></hr><h3>Exception caught in servlet:
Transform</h3>"
+ "<p>" + e.getMessage() + "</p>");
}
}//end doGet()
}//end Class UIService
Anyone have any ideas?
I am assuming that it is possible to be able to pass in parameters from jsp to a
servlet like this...?
Thanks in advance, Kevin Hooke
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