correct jsp import code with variable

I normally work in PHP, but want to import a php page to jsp.  I have the following code and the idea is to read a variable from the browser URL, then pass that variable through to the import so it can be used by php.

<%@ page language="java" contentType="text/html" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<% String room_id = request.getParameter("room_id"); %>
<c:import url="http://mydomain.com/test.php?room_id=<%=room_id%>" />

Obviously this is wrong. Can anyone tell me how to add the String value to the import url?

Thanks!!
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