http://www.cnblogs.com/jingmoxukong/p/5945200.html
http://www.cnblogs.com/knowledgesea/p/5175711.html
http://www.cnblogs.com/jiekzou/p/4486447.html
http://www.cnblogs.com/xiaogangqq123/archive/2011/03/02/1969006.html
看完这四篇文章应该能够入门了吧.
原文:http://www.cnblogs.com/EWWE/p/7113430.html