1、
http://weizhilizhiwei.iteye.com/blog/1005210
Struts2 的核心——拦截器[Interceptor]
2、
http://blog.csdn.net/wangle4717/article/details/5986674
http://blog.csdn.net/wangle4717/article/details/5986705
3、
http://www.cnblogs.com/duqiao/archive/2012/10/30/2746129.html