http://www.cnblogs.com/bronte/articles/2269786.html

http://www.cnblogs.com/bronte/articles/2269786.html

http://cyfgod.iteye.com/blog/286893

http://flym.iteye.com/blog/687216

http://blog.youkuaiyun.com/tomholmes7/article/details/5845729

http://hzylyl.blog.163.com/blog/static/3309716420104124658332/