Problem in retriving the realpath from the servlet

Hai All,
I am facing problem in retriving the realpath from the servlet.
I am using the following code in order to retrieve the path.
String prefix = getServletContext().getRealPath("/WEB-INF/classes");
The value returned from above code is null.
I am using Weblogic 8.1 server, and deploying my servlet as WAR file inside
the weblogic server.
Is this the problem with the weblogic server or with the code. Is there any way to over come this.
I need the path as i am implementing Log4j for the servlet and i have to pass the
configuration file in one of the function "PropertyConfigurator.configure(file);"
where the file should include complete path.
My configuration file is in WEB-INF/Classes directory.
Any help is appreciated.
Thanks in advance
Pooja.

String realPath = request.getRealPath(request.getContextPath());
That should return the path up to where you have your servlet context.

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