http://blog.csdn.net/ydcun/article/details/8918763
http://blog.csdn.net/zhaoming262350/article/details/8916227
http://blog.csdn.net/wconvey/article/details/8892366
http://blog.csdn.net/csh624366188/article/details/8916292
http://www.iteye.com/topic/1130402
http://zz563143188.iteye.com/blog/1867767