GETREQUESTDISPATCHER ()
lnvokable on both request, servletContext object. Expects URL pattern of destination JSP or HTML programs as argument value. Generated RequestDispatcher object can point the destination servlet JSP program and HTML program.
GETNAMEDDISPATCHER ()
lnvokable only on ServletContext object. Expects logical name of the destination servlet/JSP program as argument value. Generated RequestDispatcher object can point only to the destination servlet, JSP programs.