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

if(Regex.IsMatch(gst.Customer.EnglishName,@"[\u4e00-\u9fa5]+"))
{
ShowMessage("客人的英文名含有汉字");
return;
}

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",column 'quote_id'.

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

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.html2014/11/13怎样在百链接
 http://www.a.com/blog/b.html22014/11/12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=srcvalue=acbdd
key=srcvalue=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=srcvalue=acbdd
key=srcvalue=33ff
key=src value=gggggeeee
key=srcvalue=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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一些好用的正则表达式

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