http://dengzhangtao.iteye.com/blog/1750782
http://blog.csdn.net/chenrunhua/article/details/17006921
http://blog.csdn.net/fu_zk/article/details/12836431
http://blog.csdn.net/lizzywu/article/details/12842031
http://blog.sina.com.cn/s/blog_4057ab62010197z8.html
http://blog.sina.com.cn/s/blog_67d8d7060100q8un.html
http://blog.csdn.net/hudashi/article/details/7059006