org.apache.jasper.runtime.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl错误怎么解决：
在配置文件里加如下的内容
org.apache.jasper.runtime.ELContextImpl cannot be cast to org.apache.jasper.el.ELContextImpl
原文：http://www.cnblogs.com/oymx/p/4011416.html