加入收藏 | 设为首页 | 会员中心 | 我要投稿 李大同 (https://www.lidatong.com.cn/)- 科技、建站、经验、云计算、5G、大数据,站长网!
当前位置: 首页 > 百科 > 正文

一些好用的正则表达式

发布时间:2020-12-14 00:56:31 所属栏目:百科 来源:网络整理
导读: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-u9f

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

bw+(?=ingb)

I'm singing while you're dancing.

能匹配到2个结果: sing 和 danc


bw*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$

^WMCOSMOSd{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.*&;/divb&;

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.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)<imgs*((?<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)<imgs*((?<key>[^=]+)=(["'])(?<value>[^'"]+)2)+?s*/?>([^<>]*?</img>)?
regex 2:
(?is)<imgs+((?<key>[^=]+)=(["']?)(?<value>[^'"]+)2s*)+?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+0078243w+</[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,}0078243w{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+>)*

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

(编辑:李大同)

【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容!

    推荐文章
      热点阅读