正则表达式

http://deerchao.net/tutorials/regex/regex.htm

http://wenku.baidu.com/link?url=maDOiYt2e-42KxWwzD3l98zkyp7ykepEJP42YYgXH8WEDrlk11Q0B6YhBQ3suJOt3LGItfPUJPJvtRobRmIoNfyRBZerFDIuu5OfBRoZBlq