hehe http://blog.csdn.net/dandelion1314/article/details/47805567 http://bbs.yingjiesheng.com/thread-1982962-1-1.html http://blog.csdn.net/u011796715/article/details/52606866 https://wenku.baidu.com/view/d8e84f02caaedd3383c4d3ca.html http://download.csdn.net/download/wu1039321317/7986379