http://www.blogjava.net/keweibo/articles/150032.html
http://blog.csdn.net/fengdongkun/article/details/8619545
http://www.zhihu.com/question/21142149
http://www.yiibai.com/struts2/struts_hibernate.html
http://www.cnblogs.com/jbelial/archive/2012/05/10/2486886.html
http://www.360doc.com/content/13/0729/23/13247663_303452320.shtml
http://www.cfei.net/archives/544
