http://www.cnblogs.com/skywang12345/p/3245399.html
https://blog.csdn.net/jeffleo/article/details/54956290
https://blog.csdn.net/jeffleo/article/details/54934268
https://blog.csdn.net/jeffleo/article/details/54946424
http://www.cnblogs.com/skywang12345/p/3310835.html
https://blog.csdn.net/jeffleo/article/details/54932845
https://blog.csdn.net/jeffleo/article/details/54969233