Using include with variables (String)?

Question

Is it possible to include a *.jspf page from a variable (string)?
I'm currently trying something like this, but I know it isn't quite correct (the PAGE string is already defined):
<%@ include file="${PAGE}" %>I'm sure this is simple, but I'm pretty new to using JSP (I'm used to normal Java classes and the JSP syntax can be confusing at first...).
Thanks!

Answer 1

Ok, you're mixing up your EL expressions with scriptlet variables.
These things are not the same.
String PAGE = "pages/home.jspf"; decleares a scriptlet variable called PAGE
You can normally access it using the scriptlet expression tag like <%= PAGE %>
${PAGE} is an EL expression.
The EL variables are stored as attributes in the page, request, session and application scopes.
So ${PAGE} will not give you the value of the scriptlet variable Page.
${PAGE} is approximately equal to pageContext.findAttribute("PAGE") in java.
Probably the easiest fix would be to use a scriptlet expression rather than an EL expression.
<jsp:include page="<%= PAGE %>"/>The better fix would be not to use any scriptlet code at all in your JSP, and maybe just use the JSTL conditional tags.
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<c:set var="PAGE" value="${requestScope.page}"/>
<c:if test="${empty requestScope.page}">
  <c:set var="PAGE" value="pages/home.jspf"/>
</c:if>
<jsp:include page="${PAGE}"/>
//or
<c:import url="${PAGE}"/>Cheers,
evnafets