If you are getting the error (or similar):
The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved
Chances are the problem is one of:
- You forgot to put the JSTL jar files (there are usually two) in WEB-INF/lib.
- You are using the wrong URI (such as the outdated: http://java.sun.com/jstl/core).
- You tried to declare it in web.xml, which is no longer necessary, and that's fouling things up.