摘要：
http://www.cnblogs.com/witcxc/archive/2011/12/28/2304870.htmlhttp://www.cnblogs.com/holbrook/archive/2012/02/15/2357335.htmlhttp://blog.csdn.net/seagle0128/article/details/4530871http://www.cnblogs.com/karotte/archive/2012/06/06/2537670.htmlhttp://www.cnblogs.com/jerry-chou/archive/2011/02/22/196001 阅读全文
