好的博客记录

http://www.cnblogs.com/zyw-205520

http://blog.sina.com.cn/s/blog_75a8cfac01013aim.html

http://blog.csdn.net/fireelement/article/details/2497136

http://www.2cto.com/kf/201206/136879.html

http://284772894.iteye.com/blog/1744114