摘要：
http://blog.csdn.net/songkexin/article/details/6874863 http://www.cnblogs.com/hoojo/archive/2012/01/05/2313059.html 阅读全文
摘要：
http://blog.sina.com.cn/s/blog_4f925fc30100la36.html http://fyq891014.blog.163.com/blog/static/20074019120123305029795/ http://www.cnblogs.com/lilupin 阅读全文