Question

I m attempting to use JSPX (pure XML syntax for JSP) and running into what seems like it should work, but doesn t. I m importing taglibs using namespace declarations in the jsp:root element, then using these later on for elements as well as EL functions:

<jsp:root version="2.0"
    xmlns:jsp="http://java.sun.com/JSP/
    xmlns:c="urn:jsptld:/WEB-INF/tld/c.tld"
    xmlns:fn="urn:jsptld:/WEB-INF/tld/fn.tld">
    ...
    <c:if test="${fn:length(list) &gt; 0">
        ...
    </c:if>
    ...
</jsp:root>

I get an exception saying "The attribute prefix fn does not correspond to any imported tag library". Other pages work fine, but this page differs in that it uses a few EL functions contained in a tag library.

Is there a different kind of import I need that will bring these taglib prefixes into a scope that s visible for EL function calls?

Answer 1

Why don t you use the full TLD URI? You can find here an overview of the valid JSTL TLD URI s (click at any JSTL taglib of your interest to get the valid declaration examples).

To be sure: you have placed the JSTL JAR file(s) (jstl.jar and/or standard.jar, depending on JSTL version, until with 1.1 it s both and in 1.2 it s only jstl.jar) in the classpath and you did not extract them nor cluttered the classpath and/or web.xml with loose files and declarations as some poor online tutorials say?

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