The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application

?

2.4及以后写成(JSTL1.1)
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>???
??
写成???
2.3及以前(JSTL1.0)
<%@taglib prefix="c" uri="http://java.sun.com/jstl/core" %>