一些好用的正则表达式

参考

http://www.cnblogs.com/deerchao/archive/2006/08/24/zhengzhe30fengzhongjiaocheng.html



1,判断字符串中是否含有中文

using System.Text.RegularExpressions;

[csharp] view plain copy
  1. if (Regex.IsMatch(gst.Customer.EnglishName, @"[\u4e00-\u9fa5]+"))  
  2. {  
  3.     ShowMessage("客人的英文名含有汉字");  
  4.     return;  
  5. }  


 2,截取中间部分字符串

           //string s = Regex.Replace(" abra ", @"^\s*(.*?)\s*$", "$1");
           //return s; // 返回abra(它前后的空格被去掉了)


Regex.Replace("abcdef009gasdf879653", "^.*09(.*?)879.*$", "$1")  将会返回gasdf


Regex.Replace(ctx, ".*<div class=\"sl_top\"> <b><a name=\"top\"></a>首尾班车时刻表</b>(.*?)</div> <p class=\"notice\">注:.*", "$1")


3,截取字符串中的数字

            string sTest = "3239*aa";
            string sResult = Regex.Replace(sTest, @"[^\d]", ""); // 返回3239


4, 分组匹配

\b\w+(?=ing\b)

I'm singing while you're dancing.   

能匹配到2个结果: sing 和 danc


\b\w*q[^u]\w*\b

Iraq fighting how

匹配到1个结果:Iraq fighting


原始字符串->constraint "FK_q_contract_q_1quote". database "QBaseDemoS1", table "dbo.q_contract", column 'quote_id'.

正则表达式->^.*constraint "(.*?)". database "(.*?)", table "(.*?)", column '(.*?)'..*$


原始字符串->The DELETE statement conflicted with the REFERENCE constraint "FK_q_contract_q_1quote". The conflict occurred in database "QBaseDemoS1", table "dbo.q_contract", column 'quote_id'.

正则表达式->^.*REFERENCE constraint "(.*?)".*database "(.*?)", table "(.*?)", column '(.*?)'..*$


     private String Extension2(String sContent)
        {
            Regex r = new Regex(@"^.*REFERENCE constraint ""(.*?)"".*database ""(.*?)"", table ""(.*?)"", column '(.*?)'..*$", RegexOptions.Compiled);
            return r.Match(sContent).Result("${1}|${2}|${3}|${4}"); //返回FK_q_contract_q_1quote|QBaseDemoS1|dbo.q_contract|quote_id
        }


    // 测试内容http://www.yahoo.com.cn:8080/index.html

     private String Extension1(String sContent)
        {

           Regex r = new Regex(@"^(?<proto>\w+)://[^/]+?(?<port>\d+)?/", RegexOptions.Compiled);
           return r.Match(sContent).Result("${proto}|${port}"); //返回http|8080

      }



5, 4个样例

LIFEPRINT20130928.ZIP

LIFEPRINT_ASM_ENCOUNTERS20130928_2013-10-25_0534.txt

WMCOSMOS20140115_RXCHF70CL.TXT

分别对应 正则表达式:

^\w+\d{8}\.zip$
^.*_\d{4}-\d{2}-\d{2}_\d{4}\.txt$

^WMCOSMOS\d{8}_RXCHF70CL.TXT$

 

Regex.IsMatch("FileB_837I_PHC_5010_1191058614_PHC_TX_837I_03272014.xml", "^FileB_837(.*?)xml$",RegexOptions.IgnoreCase)

用Directory.GetFile 则 需这样:string[] arrDoneFile = System.IO.Directory.GetFiles(sNewDone,"FileB_*.xml");


6, 检查字符串A中是否包含字符串B

          A= sPageInfo 

          B= "<div id=\"dvError\" style=\"color:blue;font-size:30px;\"><br />系统忙,请稍侯重试!</div>"  --> B

          Regex.Matches(A,B).Count >=1 表示 A包含B

          eg: Regex.Matches(sPageInfo, "<div id=\"dvError\" style=\"color:blue;font-size:30px;\"><br />系统忙,请稍侯重试!</div>").Count


7,正则移除部分字符串

 String sTest = "你好吗,我是小王!(备注1:我们是同事)(备注2:我们还是邻居)【备注3:我们都是开发人员】[备注4:都搞.net]都擅长Oracle操作";
sTest = Regex.Replace(sTest, @" . ", "");//结果:你好吗,我是小王!(备注2:我们还是邻居)【备注3:我们都是开发人员】[备注4:都搞.net]都擅长Oracle操作
sTest = Regex.Replace(sTest, @"(.*)", "");//结果:你好吗,我是小王!【备注3:我们都是开发人员】[备注4:都搞.net]都擅长Oracle操作
sTest = Regex.Replace(sTest, @"【.*】", "");//结果:你好吗,我是小王![备注4:都搞.net]都擅长Oracle操作
sTest = Regex.Replace(sTest, @"
.
", "");//结果:你好吗,我是小王!都擅长Oracle操作
sTest = Regex.Replace(sTest, @"都擅长.*", "");//结果:你好吗,我是小王!



1, 匹配所有标签

regex:
\<.[^<>]*\>

source:
<external_network_location_id>20130401_TXNONC100FFS3101TAUSNPN1733590048828A_0048828</external_network_location_id>

result:
<external_network_location_id>
</external_network_location_id>

2, 匹配指定标签 eg:匹配指定的div标签

regex:
\<\bdiv.*\<\/div\b\>

source:
<div>23dd</div>
<div1>23dd</div1>
<div>23dd33ff</div>
 
result:
<div>23dd</div>
<div>23dd33ff</div>

3, 匹配某种特定格式的字符串 

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
regex:
>.[^<>]+<

source:
<li><a href="http://sports.sina.com.cn"target="_blank">新浪</a></li>
<li><a href="http://news.yule.com.cn"target="_blank">中国娱乐网</a></li>
<li><a href="http://pzh.scol.com.cn"target="_blank">四川在线</a></li>
<li><a href="http://news.0755car.com"target="_blank">车神榜</a></li>

result:
>新浪<
>中国娱乐网<
>四川在线<
>车神榜<

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

regex 2:
<li><a href="(.*?)"target="_blank">(.*?)</a></li>

source:
<li><a href="http://sports.sina.com.cn"target="_blank">新浪</a></li>
<li><a href="http://news.yule.com.cn"target="_blank">中国娱乐网</a></li>
<li><a href="http://pzh.scol.com.cn"target="_blank">四川在线</a></li>
<li><a href="http://news.0755car.com"target="_blank">车神榜</a></li>

result:
http://sports.sina.com.cn 新浪
http://news.yule.com.cn 中国娱乐网
http://pzh.scol.com.cn 四川在线
http://news.0755car.com 车神榜

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

regex:
http://([^\s]+)".+?span.+?\[(.+?)\].+?>(.+?)<

source:
<li><a href="http://www.wea.com/blog/a.html"   title="怎样在百度空间添加友情链接"><span class="article-date">[2014/11/13]</span>怎样在百链接</a></li>
<li><a href="http://www.a.com/blog/b.html2"   title="怎样在百度空间添加友情链接2"><span class="article-date">[2014/11/12]</span>怎样在百度链接2</a></li>

result:
http://www.wea.com/blog/a.html 2014/11/13 怎样在百链接
http://www.a.com/blog/b.html2 2014/11/12 怎样在百度链接2

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

regex:
<external_network_location_id>(.*?)</external_network_location_id>

source:
<external_network_location_id>20130401_TXNONC100FFS3101TAUSNPN1733590048828A_0048828</external_network_location_id>
<external_network_location_id>abcd1234004488877</external_network_location_id>

result:
20130401_TXNONC100FFS3101TAUSNPN1733590048828A_0048828
abcd1234004488877

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

regex:
<requserid>([^<]+)</requserid>

source:
<Request><Action>getuser</Action><UserLogin></UserLogin><Password></Password><Signature></Signature><VerifyText></VerifyText><requserid>535</requserid><requserid>5335</requserid></Request>

result:
535
5335

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

5,提取所有标签中的内容

regex 1:
<.+?>(.+?)<.+?>

regex 2:
(?is)(?<=>)[^<>]+(?=<)

source:
<span style=''>内容1</span><img src=".."/>内容2<p><input .../>内容3</p><p>内容4</p><b>内容5</b><i>内容6</i>

result:
内容1
内容2
内容3
内容4
内容5
内容6

6, 提取所有 img标签中的属性值 (其它标签可以借鉴)

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
regex:
(?is)<img\s*((?<key>[^=]+)="(?<value>[^"]+)")+?\s*/?>

source:
<img src="acbdd"/><img src="33ff"/><img src="gggggeeee"/><a>33333</a>

result:
key=src value=acbdd
key=src value=33ff
key=src value=gggggeeee

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

regex 1:
(?is)<img\s*((?<key>[^=]+)=(["'])(?<value>[^'"]+)\2)+?\s*/?>([^<>]*?</img>)?
regex 2:
(?is)<img\s+((?<key>[^=]+)=(["']?)(?<value>[^'"]+)\2\s*)+?\s*/?>([^<>]*?</img>)?

source:
<img src="acbdd"/><img src="33ff"/><img src="gggggeeee"/><img src="bb"></img><a>33333</a>

result:
key=src value=acbdd
key=src value=33ff
key=src value=gggggeeee
key=src value=bb

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

(?<=^<external_provider_group_id>).*(?=</external_provider_group_id>)
 可取第一个 23dd0078243d4323
贪婪 匹配
<external_provider_group_id>23dd0078243d4323</external_provider_group_id>

 可取第一个 23dd0078243d4323
贪婪 匹配
(?<=^<external_provider_group_id>).*0078243.*(?=</external_provider_group_id>)


<[A-Za-z_-]+>\w+0078243\w+</[A-Za-z_-]+>
可取以下4项
\w+ 表示 取1个或多个
<external_provider_group_id>23dd0078243d4323</external_provider_group_id>
<a>dd0078243dsd</a>
<b_b>dd0078243dsd33</b_b>
<c-c>dd0078243dsd44</c-c>

<[A-Za-z_-]+>\w{0,}0078243\w{0,}</[A-Za-z_-]+>
可取以下6项
\w{0,} 表示取0个或多个
<external_provider_group_id>23dd0078243d4323</external_provider_group_id>
<external_provider_group_id>442232323</external_provider_group_id>
<external_provider_group_id>23dd0078243d432344</external_provider_group_id>
<a>dd0078243dsd</a>
<b_b>dd0078243dsd33</b_b>
<c-c>dd0078243dsd44</c-c>
<d-d>0078243</d-d>

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

其它:

(?<=^<[A-Za-z_-]+>).*(?=</[A-Za-z_-]+>)
只能取第一个

.*(?<=<\w+>.*</\w+>)*

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