常用正则表达式

^[a-zA-Z0-9\_-]+@[a-zA-Z0-9\_-]+(\.[a-zA-Z0-9\_-]+)+$

^[A-Za-z0-9\u4e00-\u9fa5]+@[a-zA-Z0-9\_-]+(\.[a-zA-Z0-9\_-]+)+$

^1(3|4|5|6|7|8|9)\d{9}$

(\(\d{3,4}\)|\d{3,4}-|\s)?\d{8}

^((http:\/\/)|(https:\/\/))?([a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,6}(\/)

((?:(?:25[0-5]|2[0-4]\d|[01]?\d?\d)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d?\d))

^[a-zA-Z][a-zA-Z0-9\_]{4,15}$

^[\u4e00-\u9fa5]{0,}$

^[A-Za-z0-9]+$

^.{3,20}$

^[A-Za-z]+$

^[A-Z]+$

^[a-z]+$

^[A-Za-z0-9]+$

^\w+$

^[\u4E00-\u9FA5A-Za-z0-9\_]+$

^[\u4E00-\u9FA5A-Za-z0-9]+$

[^%&',;=?$\x22]+

[^~\x22]+

^-?[1-9]\d\*$

^[1-9]\d\*$

^-[1-9]\d\*$

^[1-9]\d\*|0$

^-[1-9]\d\*|0$

^-?([1-9]\d\*\.\d\*|0\.\d\*[1-9]\d\*|0?\.0+|0)$

^[1-9]\d\*\.\d\*|0\.\d\*[1-9]\d\*$

^-([1-9]\d\*\.\d\*|0\.\d\*[1-9]\d\*)$

^[1-9]\d\*\.\d\*|0\.\d\*[1-9]\d\*|0?\.0+|0$

^(-([1-9]\d\*\.\d\*|0\.\d\*[1-9]\d\*))|0?\.0+|0$