http://macrochen.iteye.com/blog/320077
http://blackproof.iteye.com/blog/1525228
http://hi.baidu.com/moolong/item/8d5639c561a2a37c89ad9ec7
http://blog.csdn.net/kongxx/article/details/6607083http://vaporz.blog.51cto.com/3142258/706945
http://www.cnblogs.com/xiuyusoft/archive/2011/06/17/2083616.html