正则表达式

http://blog.csdn.net/ye1992/article/details/25286539

http://www.jb51.net/article/43727.htm

http://blog.sina.com.cn/s/blog_4540c3630100aq01.html

http://www.docin.com/p-752071560.html

http://blog.chinaunix.net/uid-12348673-id-3335307.html