正则表达式学习: [] 中括号是特殊标记,用以划定属于组内的字符的界限 "w "W "d "D "s "S _ . + * {} ? 子阳兄推荐的工具 https://files.cnblogs.com/JimmyZhang/RegexTester.zip http://www.cnblogs.com/JimmyZhang/archive/2007/10/19/930900.html