摘要：
http://www.cnblogs.com/nnkook/archive/2012/05/10/2494567.htmlhttp://www.cnblogs.com/Martin_Q/archive/2010/12/06/1897614.htmlhttp://www.cnblogs.com/haio/archive/2010/07/12/1775809.htmlhttp://wenku.baidu.com/view/6bebf148767f5acfa0c7cd01.htmlhttp://www.cnblogs.com/phqde/archive/2012/08/23/2652162.html 阅读全文
