jstl缺包时的报错

jsp中：<%@ taglib prefix="c" uri="​​http://java.sun.com/jsp/jstl/core"​​​ %> 
报错：​The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar​
解决办法：
增加包jstl.jar和standard.jar即可