Question

Say I’m using a tag library packaged in a JAR file. Given that I don’t want to modify the JAR file, is there a way to change or override the declared URI of the tag library in case that its URI collides with another tag library?

Answer 1

If you get conflicting URIs for different taglibs and don’t want to change the JAR, you could extract the TLD from the JAR and try to overwrite it in web.xml with something like this:

<jsp-config>
    <taglib>
        <taglib-uri>http://foobar.org</taglib-uri>
        <taglib-location>/WEB-INF/tlds/yourtaglib.tld</taglib-location>
    </taglib>
</jsp-config>

This assumes you placed the extracted TLD file in /WEB-INF/tlds/yourtaglib.tld and that you will refer to it with http://foobar.org in the JSPs:

<%@ taglib uri="http://foobar.org" prefix="p" %>