1.http://blog.csdn.net/yuzhihui_no1/article/details/38666589
2.http://blog.csdn.net/yuzhihui_no1/article/details/38690015
3.http://blog.csdn.net/yuzhihui_no1/article/details/38737615
4.http://blog.csdn.net/yuzhihui_no1/article/details/38827603
5.http://blog.csdn.net/yuzhihui_no1/article/details/38965069