20个常用正则

摘要: 这20个正则表达式，能让你少写1,000行代码

1 . 校验密码强度
^(?=.\d)(?=.[a-z])(?=.*[A-Z]).{8,10}$

校验中文

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

3.由数字、26个英文字母或下划线组成的字符串

^\w+$

4.校验E-Mail 地址

[\w!#$%&'+/=?^_

{|}~-]+(?:\.[\w!#$%&'*+/=?^_

{|}~-]+)@(?:*[\w]]\w?.)+*[\w]]\w?

5.校验身份证号码

15位：^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$
18位：^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}([0-9]|X)$

6.校验日期

^(?:(?!0000)[0-9]{4}-(?:(?:0[1-9]|1[0-2])-(?:0[1-9]|1[0-9]|2[0-8])|(?:0[13-9]|1[0-2])-(?:29|30)|(?:0[13578]|1[02])-31)|(?:[0-9]{2}(?:0[48]|[2468][048]|[13579][26])|(?:0[48]|[2468][048]|[13579][26])00)-02-29)$

校验金额

金额校验，精确到2位小数：^[0-9]+(.[0-9]{2})?$

校验手机号

^(13[0-9]|14[5|7]|15[0|1|2|3|5|6|7|8|9]|18[0|1|2|3|5|6|7|8|9])\d{8}$

9.判断IE的版本

^.*MSIE +]5-8?(?!.Trident/[5-9].0).$

10.校验IP-v4地址

\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b

11.校验IP-v6地址

(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]).){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]).){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))

12.检查URL的前缀

if (!s.match(/^[a-zA-Z]+:///))
{
s = 'http://' + s;
}

13.提取URL链接

^(f|ht){1}(tp|tps)://([\w-]+.)+[\w-]+(/[\w- ./?%&=]*)?

14.文件路径及扩展名校验

^([a-zA-Z]:|\)\([^\]+\)[^/:?"<>|]+.txt(l)?$

15.提取Color Hex Codes

^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$

16.提取网页图片

< [img][^\>][src] *= ["']{0,1}([^"'\ >])

17.提取页面超链接

(<a\s*(?!.\brel=)[^>])(href="https?://)((?!(?:(?:www.)?'.implode('|(?:www.)?', $follow_list).'))[^"]+)"((?!.\brel=)[^>])(?:[^>]*)>

18.查找CSS属性

^\s*[a-zA-Z-]+\s*[:]{1}\s[a-zA-Z0-9\s.#]+[;]{1}

19.抽取注释

<!--(.*?)-->

20.匹配HTML标签

</?\w+((\s+\w+(\s*=\s*(?:".?"|'.?'|[^'">\s]+))?)+\s*|\s*)/?>