JSTL必要包(jstl.jar和standard.jar)

解决struts2中报错:“HTTP Status 500 - org.apache.jasper.JasperException: 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”,将这两个jar包拷贝到WebContent/WEB-INF/lib目录下,可解决当前App报错,若拷贝到Tomcat 7.0/lib目录下,可解决所有App的此类报错。