这20个正则表达式，让你少写1,000行代码

博主： wm88990
发布时间：2016 年 11 月 18 日
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分类：编程趣事

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	正则表达式——古老而又强大的文本处理工具。仅用一段简短的表达式语句，就能快速地实现一个复杂的业务逻辑。掌握正则表达式，让你的开发效率有一个质的飞跃。 

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

<pre class="prettyprint lang-js linenums">var reg = /^(\\d{1,4})(-|\\/)(\\d{1,2})\\2(\\d{1,2})$/; 
var r = fieldValue.match(reg); 
if(r==null)alert('Date format error!');</pre>
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	1、校验密码强度 

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	密码的强度必须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 

<pre class="prettyprint linenums">^(?=.*\\d)(?=.*[a-z])(?=.*[A-Z]).{8,10}$</pre>
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	2、校验中文 
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	字符串只能是中文 

<pre class="prettyprint linenums">^[\\u4e00-\\u9fa5]{0,}$</pre>

	<strong style="color:#AB1942;font-family:'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;font-size:16px;line-height:25.6px;margin:0px;padding:0px;max-width:100%;box-sizing:border-box !important;word-wrap:break-word !important;background-color:#FFFFFF;">3、由数字，26个英文字母或下划线组成的字符串

<pre class="prettyprint linenums">^\\w+$</pre>
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	4、校验E-Mail 地址 
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<pre class="prettyprint linenums">[\\w!#$%&amp;'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&amp;'*+/=?^_`{|}~-]+)*@(?:[\\w](?:[\\w-]*[\\w])?\\.)+[\\w](?:[\\w-]*[\\w])?</pre>
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	5、校验身份证号码 

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	15位： 

<pre class="prettyprint linenums">^[1-9]\\d{7}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}$</pre>
<strong style="margin:0px;padding:0px;max-width:100%;color:#3E3E3E;font-family:'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;font-size:16px;line-height:25.6px;white-space:pre-wrap;box-sizing:border-box !important;word-wrap:break-word !important;background-color:#FFFFFF;">18位： 
<pre class="prettyprint linenums">^[1-9]\\d{5}[1-9]\\d{3}((0\\d)|(1[0-2]))(([0|1|2]\\d)|3[0-1])\\d{3}([0-9]|X)$</pre>
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	6、校验日期 
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	“yyyy-mm-dd“ 格式的日期校验，已考虑平闰年 

<pre class="prettyprint linenums">^(?:(?!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)$</pre>
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	7、校验金额 

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	金额校验，精确到2位小数 

<pre class="prettyprint linenums">^[0-9]+(.[0-9]{2})?$</pre>
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	8、校验手机号 
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	下面是国内 13、15、18开头的手机号正则表达式 
 

<pre class="prettyprint linenums">^(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}$</pre>
<strong style="margin:0px;padding:0px;max-width:100%;color:#AB1942;font-family:'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;font-size:16px;line-height:25.6px;white-space:pre-wrap;box-sizing:border-box !important;word-wrap:break-word !important;background-color:#FFFFFF;">9、判断IE的版本 
<pre class="prettyprint linenums">^.*MSIE [5-8](?:\\.[0-9]+)?(?!.*Trident\\/[5-9]\\.0).*$</pre>
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	10、校验IP-v4地址 
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<pre class="prettyprint linenums">\\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</pre>
<strong style="margin:0px;padding:0px;max-width:100%;color:#AB1942;font-family:'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;font-size:16px;line-height:25.6px;white-space:pre-wrap;box-sizing:border-box !important;word-wrap:break-word !important;background-color:#FFFFFF;">11、校验IP-v6地址 
<pre class="prettyprint linenums">(([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]))
</pre>
<strong style="margin:0px;padding:0px;max-width:100%;color:#AB1942;font-family:'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;font-size:16px;line-height:25.6px;white-space:pre-wrap;box-sizing:border-box !important;word-wrap:break-word !important;background-color:#FFFFFF;">12、检查URL的前缀 
<pre class="prettyprint linenums">if (!s.match(/^[a-zA-Z]+:\\/\\//)){
 s = 'http://' + s;}</pre>
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	13、提取URL链接 
</h4>
<pre class="prettyprint linenums">^(f|ht){1}(tp|tps):\\/\\/([\\w-]+\\.)+[\\w-]+(\\/[\\w- ./?%&amp;=]*)?</pre>
<strong style="margin:0px;padding:0px;max-width:100%;color:#AB1942;font-family:'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;font-size:16px;line-height:25.6px;white-space:pre-wrap;box-sizing:border-box !important;word-wrap:break-word !important;background-color:#FFFFFF;">14、文件路径及扩展名校验 
<pre class="prettyprint linenums">^([a-zA-Z]\\:|\\\\)\\\$[^\\\\]+\\\$*[^\\/:*?"&lt;&gt;|]+\\.txt(l)?$</pre>
<strong style="margin:0px;padding:0px;max-width:100%;color:#AB1942;font-family:'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;font-size:16px;line-height:25.6px;white-space:pre-wrap;box-sizing:border-box !important;word-wrap:break-word !important;background-color:#FFFFFF;">15、提取Color Hex &nbsp;Codes 
<pre class="prettyprint linenums">^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$</pre>
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	16、提取网页图片 
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<pre class="prettyprint linenums">\\&lt; *[img][^\\\\&gt;]*[src] *= *[\\"\\']{0,1}([^\\"\\'\\ &gt;]*)</pre>
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	17、提取页面超链接 
</h4>
<pre class="prettyprint linenums">(&lt;a\\s*(?!.*\\brel=)[^&gt;]*)(href="https?:\\/\\/)((?!(?:(?:www\\.)?'.implode('|(?:www\\.)?', $follow_list).'))[^"]+)"((?!.*\\brel=)[^&gt;]*)(?:[^&gt;]*)&gt;</pre>
<strong style="margin:0px;padding:0px;max-width:100%;color:#AB1942;font-family:'Helvetica Neue', Helvetica, 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif;font-size:16px;line-height:25.6px;white-space:pre-wrap;box-sizing:border-box !important;word-wrap:break-word !important;background-color:#FFFFFF;">18、查找CSS属性 
<pre class="prettyprint linenums">^\\s*[a-zA-Z\\-]+\\s*[:]{1}\\s[a-zA-Z0-9\\s.#]+[;]{1}</pre>
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	19、抽取注释 
</h4>
<pre class="prettyprint linenums">&lt;!--(.*?)--&gt;</pre>
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	20、匹配HTML标签 
</h4>
<pre class="prettyprint lang-js linenums">&lt;\\/?\\w+((\\s+\\w+(\\s*=\\s*(?:".*?"|'.*?'|[\\^'"&gt;\\s]+))?)+\\s*|\\s*)\\/?&gt;</pre>

最后修改：1970 年 01 月 01 日