<%
java.util.Enumeration enu = request.getAttributeNames();
while (enu.hasMoreElements()) {
  String key = (String)enu.nextElement() ;
  out.println("<br>");
  out.println(key +":"+request.getAttribute(key));
}
%>
<br>
javax.servlet.forward.request_uri:<%=request.getAttribute("javax.servlet.forward.request_uri")%>