http://edu.51cto.com/course/course_id-623-page-1.html
http://blog.csdn.net/ch_soft/article/category/913850
http://www.cnblogs.com/syxchina/archive/2012/09/17/2689830.html
http://blog.csdn.net/column/details/ryan-zone.html
原文：http://www.cnblogs.com/jiezzy/p/3770187.html