常用20个正则表达式

正则表达式经常被用于字段或任意字符串的校验，如下面这段校验基本日期格式的JavaScript代码：

<span class="hljs-keyword">var</span> reg = /^(\\d{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>})(-|\\/)(\\d{<span class="hljs-number">1</span>,<span class="hljs-number">2</span>})\\<span class="hljs-number">2</span>(\\d{<span class="hljs-number">1</span>,<span class="hljs-number">2</span>})$/; 
<span class="hljs-keyword">var</span> r = fieldValue.<span class="hljs-keyword">match</span>(reg);             
<span class="hljs-keyword">if</span>(r==<span class="hljs-literal">null</span>)alert(<span class="hljs-symbol">'Date</span> format error!');

var reg = /^(\\d{1,4})(-|\\/)(\\d{1,2})\\2(\\d{1,2})$/;

var r = fieldValue.match(reg);

if(r==null)alert('Date format error!');

1 . 校验密码强度

密码的强度必须是包含大小写字母和数字的组合，不能使用特殊字符，长度在8-10之间。

^(?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{<span class="hljs-number">8</span>,<span class="hljs-number">10</span>}$

1	^(?=.\\d)(?=.[a-z])(?=.*[A-Z]).{<span class="hljs-number">8</span>,<span class="hljs-number">10</span>}$

2. 校验中文

字符串仅能是中文。

^<span class="hljs-special">[</span><span class="hljs-command">\\</span>u4e00-<span class="hljs-command">\\</span>u9fa5<span class="hljs-special">]</span><span class="hljs-special">{</span>0,<span class="hljs-special">}</span><span class="hljs-formula">$</span>

1	^<span class="hljs-special">[</span><span class="hljs-command">\\</span>u4e00-<span class="hljs-command">\\</span>u9fa5<span class="hljs-special">]</span><span class="hljs-special">{</span>0,<span class="hljs-special">}</span><span class="hljs-formula">$</span>

3. 由数字、26个英文字母或下划线组成的字符串

^<span class="hljs-command">\\</span>w+<span class="hljs-formula">$</span>

1	^<span class="hljs-command">\\</span>w+<span class="hljs-formula">$</span>

4. 校验E-Mail 地址

同密码一样，下面是E-mail地址合规性的正则检查语句。

[<span class="hljs-link_label">\\w!#$%&amp;'*+/=?^_`{|}~-</span>]+(?:\\.[<span class="hljs-link_label">\\w!#$%&amp;'*+/=?^_`{|}~-</span>]+)<span class="hljs-emphasis">*@(?:[\\w](?:[\\w-]*</span>[<span class="hljs-link_label">\\w</span>])?\\.)+[<span class="hljs-link_label">\\w</span>](<span class="hljs-link_url">?:[\\w-]*[\\w]</span>)?

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

5. 校验身份证号码

下面是身份证号码的正则校验。15 或 18位。

15位：

^[<span class="hljs-number">1</span>-<span class="hljs-number">9</span>]\\d{<span class="hljs-number">7</span>}((<span class="hljs-number">0</span>\\d)|(<span class="hljs-number">1</span>[<span class="hljs-number">0</span>-<span class="hljs-number">2</span>]))(([<span class="hljs-number">0</span>|<span class="hljs-number">1</span>|<span class="hljs-number">2</span>]\\d)|<span class="hljs-number">3</span>[<span class="hljs-number">0</span>-<span class="hljs-number">1</span>])\\d{<span class="hljs-number">3</span>}$

^[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}$

18位：

^[<span class="hljs-number">1</span>-<span class="hljs-number">9</span>]\\d{<span class="hljs-number">5</span>}[<span class="hljs-number">1</span>-<span class="hljs-number">9</span>]\\d{<span class="hljs-number">3</span>}((<span class="hljs-number">0</span>\\d)|(<span class="hljs-number">1</span>[<span class="hljs-number">0</span>-<span class="hljs-number">2</span>]))(([<span class="hljs-number">0</span>|<span class="hljs-number">1</span>|<span class="hljs-number">2</span>]\\d)|<span class="hljs-number">3</span>[<span class="hljs-number">0</span>-<span class="hljs-number">1</span>])\\d{<span class="hljs-number">3</span>}([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]|X)$

^[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

“yyyy-mm-dd“ 格式的日期校验，已考虑平闰年。

^(?:(?!0000)[<span class="hljs-link_label">0-9</span>]{4}-(?:(?:0[<span class="hljs-link_label">1-9</span>]|1[<span class="hljs-link_label">0-2</span>])-(?:0[<span class="hljs-link_label">1-9</span>]|1[<span class="hljs-link_label">0-9</span>]|2[<span class="hljs-link_label">0-8</span>])|(?:0[<span class="hljs-link_label">13-9</span>]|1[<span class="hljs-link_label">0-2</span>])-(?:29|30)|(?:0[<span class="hljs-link_label">13578</span>]|1[<span class="hljs-link_label">02</span>])-31)|(?:[<span class="hljs-link_label">0-9</span>]{2}(?:0[<span class="hljs-link_label">48</span>]|[<span class="hljs-link_label">2468</span>][<span class="hljs-link_reference">048</span>]|[<span class="hljs-link_label">13579</span>][<span class="hljs-link_reference">26</span>])|(?:0[<span class="hljs-link_label">48</span>]|[<span class="hljs-link_label">2468</span>][<span class="hljs-link_reference">048</span>]|[<span class="hljs-link_label">13579</span>][<span class="hljs-link_reference">26</span>])00)-02-29)$

^(?:(?!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)$

7. 校验金额

金额校验，精确到2位小数。

^[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]+(.[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]{<span class="hljs-number">2</span>})?$

1	^[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]+(.[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]{<span class="hljs-number">2</span>})?$

8. 校验手机号

下面是国内 13、15、18开头的手机号正则表达式。（可根据目前国内收集号扩展前两位开头号码）

^(<span class="hljs-number">13</span>[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]|<span class="hljs-number">14</span>[<span class="hljs-number">5</span>|<span class="hljs-number">7</span>]|<span class="hljs-number">15</span>[<span class="hljs-number">0</span>|<span class="hljs-number">1</span>|<span class="hljs-number">2</span>|<span class="hljs-number">3</span>|<span class="hljs-number">5</span>|<span class="hljs-number">6</span>|<span class="hljs-number">7</span>|<span class="hljs-number">8</span>|<span class="hljs-number">9</span>]|<span class="hljs-number">18</span>[<span class="hljs-number">0</span>|<span class="hljs-number">1</span>|<span class="hljs-number">2</span>|<span class="hljs-number">3</span>|<span class="hljs-number">5</span>|<span class="hljs-number">6</span>|<span class="hljs-number">7</span>|<span class="hljs-number">8</span>|<span class="hljs-number">9</span>])\\d{<span class="hljs-number">8</span>}$

^(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

IE目前还没被完全取代，很多页面还是需要做版本兼容，下面是IE版本检查的表达式。

^.*MSIE [<span class="hljs-number">5</span>-<span class="hljs-number">8</span>](?:\\.[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]+)?(?!.*Trident\\/[<span class="hljs-number">5</span>-<span class="hljs-number">9</span>]\\<span class="hljs-number">.0</span>).*$

1	^.MSIE [<span class="hljs-number">5</span>-<span class="hljs-number">8</span>](?:\\.[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]+)?(?!.Trident\\/[<span class="hljs-number">5</span>-<span class="hljs-number">9</span>]\\<span class="hljs-number">.0</span>).*$

10. 校验IP-v4地址

IP4 正则语句。

\\b(?:(?:25[<span class="hljs-link_label">0-5</span>]|2[<span class="hljs-link_label">0-4</span>][<span class="hljs-link_reference">0-9</span>]|[<span class="hljs-link_label">01</span>]?[<span class="hljs-link_label">0-9</span>][<span class="hljs-link_reference">0-9</span>]?)\\.){3}(?:25[<span class="hljs-link_label">0-5</span>]|2[<span class="hljs-link_label">0-4</span>][<span class="hljs-link_reference">0-9</span>]|[<span class="hljs-link_label">01</span>]?[<span class="hljs-link_label">0-9</span>][<span class="hljs-link_reference">0-9</span>]?)\\b

\\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

IP6 正则语句。

(([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:){<span class="hljs-number">7</span>,<span class="hljs-number">7</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}|([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:){<span class="hljs-number">1</span>,<span class="hljs-number">7</span>}:|([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:){<span class="hljs-number">1</span>,<span class="hljs-number">6</span>}:[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}|([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:){<span class="hljs-number">1</span>,<span class="hljs-number">5</span>}(:[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}){<span class="hljs-number">1</span>,<span class="hljs-number">2</span>}|([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:){<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}(:[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}){<span class="hljs-number">1</span>,<span class="hljs-number">3</span>}|([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:){<span class="hljs-number">1</span>,<span class="hljs-number">3</span>}(:[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}){<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}|([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:){<span class="hljs-number">1</span>,<span class="hljs-number">2</span>}(:[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}){<span class="hljs-number">1</span>,<span class="hljs-number">5</span>}|[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:((:[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}){<span class="hljs-number">1</span>,<span class="hljs-number">6</span>})|:((:[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}){<span class="hljs-number">1</span>,<span class="hljs-number">7</span>}|:)|fe80:(:[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">0</span>,<span class="hljs-number">4</span>}){<span class="hljs-number">0</span>,<span class="hljs-number">4</span>}%[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-zA-Z]{<span class="hljs-number">1</span>,}|::(ffff(:<span class="hljs-number">0</span>{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}){<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}:){<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}((<span class="hljs-number">25</span>[<span class="hljs-number">0</span>-<span class="hljs-number">5</span>]|(<span class="hljs-number">2</span>[<span class="hljs-number">0</span>-<span class="hljs-number">4</span>]|<span class="hljs-number">1</span>{<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]){<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>])\\.){<span class="hljs-number">3</span>,<span class="hljs-number">3</span>}(<span class="hljs-number">25</span>[<span class="hljs-number">0</span>-<span class="hljs-number">5</span>]|(<span class="hljs-number">2</span>[<span class="hljs-number">0</span>-<span class="hljs-number">4</span>]|<span class="hljs-number">1</span>{<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]){<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>])|([<span class="hljs-number">0</span>-<span class="hljs-number">9</span>a-fA-F]{<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:){<span class="hljs-number">1</span>,<span class="hljs-number">4</span>}:((<span class="hljs-number">25</span>[<span class="hljs-number">0</span>-<span class="hljs-number">5</span>]|(<span class="hljs-number">2</span>[<span class="hljs-number">0</span>-<span class="hljs-number">4</span>]|<span class="hljs-number">1</span>{<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]){<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>])\\.){<span class="hljs-number">3</span>,<span class="hljs-number">3</span>}(<span class="hljs-number">25</span>[<span class="hljs-number">0</span>-<span class="hljs-number">5</span>]|(<span class="hljs-number">2</span>[<span class="hljs-number">0</span>-<span class="hljs-number">4</span>]|<span class="hljs-number">1</span>{<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]){<span class="hljs-number">0</span>,<span class="hljs-number">1</span>}[<span class="hljs-number">0</span>-<span class="hljs-number">9</span>]))

(([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

应用开发中很多时候需要区分请求是HTTPS还是HTTP，通过下面的表达式可以取出一个url的前缀然后再逻辑判断。

<span class="hljs-keyword">if</span> (!s.<span class="hljs-keyword">match</span>(/^[a-zA-<span class="hljs-type">Z</span>]+:\\/\\<span class="hljs-comment">//))</span>
{
    s = <span class="hljs-symbol">'http</span>:<span class="hljs-comment">//' + s;</span>
}

if (!s.match(/^[a-zA-Z]+:\\/\\//))

{

s = 'http://' + s;

}

13. 提取URL链接

下面的这个表达式可以筛选出一段文本中的URL。

^(f|ht)<span class="hljs-special">{</span>1<span class="hljs-special">}</span>(tp|tps):<span class="hljs-command">\\</span>/<span class="hljs-command">\\</span>/(<span class="hljs-special">[</span><span class="hljs-command">\\</span>w-<span class="hljs-special">]</span>+<span class="hljs-command">\\</span>.)+<span class="hljs-special">[</span><span class="hljs-command">\\</span>w-<span class="hljs-special">]</span>+(<span class="hljs-command">\\</span>/<span class="hljs-special">[</span><span class="hljs-command">\\</span>w- ./?<span class="hljs-comment">%&amp;=]*)?</span>

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

14. 文件路径及扩展名校验

验证windows下文件路径和扩展名（下面的例子中为.txt文件）

^(<span class="hljs-special">[</span>a-zA-Z<span class="hljs-special">]</span><span class="hljs-command">\\</span>:|<span class="hljs-command">\\</span><span class="hljs-command">\\</span>)<span class="hljs-command">\\</span><span class="hljs-command">\\</span>(<span class="hljs-special">[</span>^<span class="hljs-command">\\</span><span class="hljs-command">\\</span><span class="hljs-special">]</span>+<span class="hljs-command">\\</span><span class="hljs-command">\\</span>)*<span class="hljs-special">[</span>^<span class="hljs-command">\\</span>/:*?"&lt;&gt;|<span class="hljs-special">]</span>+<span class="hljs-command">\\</span>.txt(l)?<span class="hljs-formula">$</span>

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

15. 提取Color Hex Codes

有时需要抽取网页中的颜色代码，可以使用下面的表达式。

^<span class="hljs-preprocessor">#([A-Fa-f0-<span class="hljs-number">9</span>]{<span class="hljs-number">6</span>}|[A-Fa-f0-<span class="hljs-number">9</span>]{<span class="hljs-number">3</span>})$</span>

1	^<span class="hljs-preprocessor">#([A-Fa-f0-<span class="hljs-number">9</span>]{<span class="hljs-number">6</span>}\|[A-Fa-f0-<span class="hljs-number">9</span>]{<span class="hljs-number">3</span>})$</span>

16. 提取网页图片

假若你想提取网页中所有图片信息，可以利用下面的表达式。

<span class="hljs-command">\\</span>&lt; *<span class="hljs-special">[</span>img<span class="hljs-special">]</span><span class="hljs-special">[</span>^<span class="hljs-command">\\</span><span class="hljs-command">\\</span>&gt;<span class="hljs-special">]</span>*<span class="hljs-special">[</span>src<span class="hljs-special">]</span> *= *<span class="hljs-special">[</span><span class="hljs-command">\\</span>"<span class="hljs-command">\\</span>'<span class="hljs-special">]</span><span class="hljs-special">{</span>0,1<span class="hljs-special">}</span>(<span class="hljs-special">[</span>^<span class="hljs-command">\\</span>"<span class="hljs-command">\\</span>'<span class="hljs-command">\\</span> &gt;<span class="hljs-special">]</span>*)

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

17. 提取页面超链接

提取html中的超链接。

(&lt;a<span class="hljs-command">\\</span>s*(?!.*<span class="hljs-command">\\</span>brel=)<span class="hljs-special">[</span>^&gt;<span class="hljs-special">]</span>*)(href="https?:<span class="hljs-command">\\</span>/<span class="hljs-command">\\</span>/)((?!(?:(?:www<span class="hljs-command">\\</span>.)?'.implode('|(?:www<span class="hljs-command">\\</span>.)?', <span class="hljs-formula">$follow_list).'))<span class="hljs-special">[</span>^"<span class="hljs-special">]</span>+)"((?!.*<span class="hljs-command">\\</span>brel=)<span class="hljs-special">[</span>^&gt;<span class="hljs-special">]</span>*)(?:<span class="hljs-special">[</span>^&gt;<span class="hljs-special">]</span>*)&gt;</span>

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

18. 查找CSS属性

通过下面的表达式，可以搜索到相匹配的CSS属性。

^<span class="hljs-command">\\</span>s*<span class="hljs-special">[</span>a-zA-Z<span class="hljs-command">\\</span>-<span class="hljs-special">]</span>+<span class="hljs-command">\\</span>s*<span class="hljs-special">[</span>:<span class="hljs-special">]</span><span class="hljs-special">{</span>1<span class="hljs-special">}</span><span class="hljs-command">\\</span>s<span class="hljs-special">[</span>a-zA-Z0-9<span class="hljs-command">\\</span>s.<span class="hljs-special">#</span><span class="hljs-special">]</span>+<span class="hljs-special">[</span>;<span class="hljs-special">]</span><span class="hljs-special">{</span>1<span class="hljs-special">}</span>

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

19. 抽取注释

如果你需要移除HMTL中的注释，可以使用如下的表达式。

<span class="hljs-comment">&lt;!--(.*?)--&gt;</span>

1	<span class="hljs-comment"><!--(.*?)--></span>

20. 匹配HTML标签

通过下面的表达式可以匹配出HTML中的标签属性。

&lt;<span class="hljs-command">\\</span>/?<span class="hljs-command">\\</span>w+((<span class="hljs-command">\\</span>s+<span class="hljs-command">\\</span>w+(<span class="hljs-command">\\</span>s*=<span class="hljs-command">\\</span>s*(?:".*?"|'.*?'|<span class="hljs-special">[</span><span class="hljs-command">\\</span>^'"&gt;<span class="hljs-command">\\</span>s<span class="hljs-special">]</span>+))?)+<span class="hljs-command">\\</span>s*|<span class="hljs-command">\\</span>s*)<span class="hljs-command">\\</span>/?&gt;

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

正则表达式的相关语法

下面是我找到的一张非常不错的正则表达式 Cheat Sheet，可以用来快速查找相关语法。

学习正则表达式

我在网上看到了一篇相当不错的正则表达式快速学习指南，有兴趣继续深入学习的同学可以参考。

正则表达式在线测试工具

regex101是一个非常不错的正则表达式在线测试工具，你可以直接在线测试你的正则表达式哦。

奔走的少年

1 . 校验密码强度

2. 校验中文

3. 由数字、26个英文字母或下划线组成的字符串

4. 校验E-Mail 地址

5. 校验身份证号码

6. 校验日期

7. 校验金额

8. 校验手机号

9. 判断IE的版本

10. 校验IP-v4地址

11. 校验IP-v6地址

12. 检查URL的前缀

13. 提取URL链接

14. 文件路径及扩展名校验

15. 提取Color Hex Codes

16. 提取网页图片

17. 提取页面超链接

18. 查找CSS属性

19. 抽取注释

20. 匹配HTML标签

正则表达式的相关语法

学习正则表达式

正则表达式在线测试工具

Peter

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OSX三行命令升级Git

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发表评论取消回复

常用20个正则表达式

1 . 校验密码强度

2. 校验中文

3. 由数字、26个英文字母或下划线组成的字符串

4. 校验E-Mail 地址

5. 校验身份证号码

6. 校验日期

7. 校验金额

8. 校验手机号

9. 判断IE的版本

10. 校验IP-v4地址

11. 校验IP-v6地址

12. 检查URL的前缀

13. 提取URL链接

14. 文件路径及扩展名校验

15. 提取Color Hex Codes

16. 提取网页图片

17. 提取页面超链接

18. 查找CSS属性

19. 抽取注释

20. 匹配HTML标签

正则表达式的相关语法

学习正则表达式

正则表达式在线测试工具

Peter

You Might Also Like

OSX三行命令升级Git

使用Prettier和Eslint格式化(修复)代码

Javascript连等赋值问题

发表评论 取消回复

发表评论取消回复