HTTP Status 500 - The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either报错

HTTP Status 500 - 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

解决方案:
在项目中的WEB-INFO文件夹里创建一个lib目录并在向lib目录里面导入这两个jar包， jstl1.2和servlet-api.jar

然后再将这两个jar包复制到tomcat里面的lib目录下。例如：D:tomcat-7.0.53lib，重启项目即可