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