1.http://www.tuicool.com/articles/2yM7Z3
2.http://elf8848.iteye.com/blog/1582137
3.http://blog.csdn.net/pang040328/article/details/41259385
4.http://xiao990987.blog.163.com/blog/static/112648814201331794014339/
待整理……
原文：http://www.cnblogs.com/zrp2013/p/5714900.html