Hi,
it is possible to add new parameters to request object when using jsp pages
<jsp:forward ...
  <jsp:param ..

but there is no way that I know to do the same thing in servets while forwarding the request to another page. Should not there be a way of doing this?

There is no way to add request parameters to a HttpServletRequest object. This allows the servlet engines to optimize how they handle request parameters.

My suggestions are:

1) Pass data in the forward operation in other ways, such as request.setAttribute(). You can even use alternate logic to check both request parameters and request attributes:

<%
String data = request.getParameter("data");
if (data == null) {
  data = request.getAttribute("data");
}

2) If this really won't work, you can use a Servlet 2.3 HttpServletRequestWrapper (or some custom variation on this if you are using Servet 2.2), but this is probably more trouble than it is worth.

thanks a lot for your care,
using a wrapper we solved the problem but I believe that current servlet spesifications lacks such functionality and should be added to HttpServletRequest interface for the comming spesification releases.