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    正则表达式问题???
    34
    0

    遇到一个正则表达式获取key-value键值对的问题???

    如下例子:

           <table xmlns:util="org.dspace.app.xmlui.utils.XSLUtils" xmlns:oreatom="http://www.openarchives.org/ore/atom/" xmlns:ore="http://www.openarchives.org/ore/terms/" xmlns:atom="http://www.w3.org/2005/Atom" class="ds-includeSet-table detailtable"> 
            <tbody>
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.contributor.author</td> 
              <td>Roberts, John M. K.</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.contributor.author</td> 
              <td>Anderson, Denis L.</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.contributor.author</td> 
              <td>Tay, Wee Tek</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.coverage.spatial</td> 
              <td>Papua New Guinea</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.coverage.spatial</td> 
              <td>Solomon Islands</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.coverage.spatial</td> 
              <td>Papua</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.coverage.spatial</td> 
              <td>Indonesia</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.date.accessioned</td> 
              <td>2015-03-31T16:29:05Z</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.date.available</td> 
              <td>2015-03-31T16:29:05Z</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.date.issued</td> 
              <td>2015-04-03</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.identifier</td> 
              <td>doi:10.5061/dryad.vt536</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.identifier.citation</td> 
              <td>Roberts JMK, Anderson DL, Tay WT (2015) Multiple host-shifts by the emerging honeybee parasite, Varroa jacobsoni. Molecular Ecology 24(10): 2379-2391.</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.identifier.uri</td> 
              <td>http://hdl.handle.net/10255/dryad.83323<;/td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.description</td> 
              <td>Host shifts are a key mechanism of parasite evolution and responsible for the emergence of many economically important pathogens. Varroa destructor has been a major factor in global honeybee (Apis mellifera) declines since shifting hosts from the Asian honeybee (Apis cerana) &gt; 50 years ago. Until recently, only two haplotypes of V. destructor (Korea and Japan) had successfully host shifted to A. mellifera. In 2008, the sister species V. jacobsoni was found for the first time parasitizing A. mellifera in Papua New Guinea (PNG). This recent host shift presents a serious threat to world apiculture but also provides the opportunity to examine host shifting in this system. We used 12 microsatellites to compare genetic variation of V. jacobsoni on A. mellifera in PNG with mites on A. cerana in both PNG and surrounding regions. We identified two distinct lineages of V. jacobsoni reproducing on A. mellifera in PNG. Our analysis indicated independent host shift events have occurred through small numbers of mites shifting from local A. cerana populations. Additional lineages were found in the neighbouring Papua and Solomon Islands that had partially host shifted to A. mellifera, that is producing immature offspring on drone brood only. These mites were likely in transition to full colonization of A. mellifera. Significant population structure between mites on the different hosts suggested host shifted V. jacobsoni populations may not still reproduce on A. cerana, although limited gene flow may exist. Our studies provide further insight into parasite host shift evolution and help characterize this new Varroa mite threat to A. mellifera worldwide.</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.relation.haspart</td> 
              <td>doi:10.5061/dryad.vt536/1</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.relation.isreferencedby</td> 
              <td>doi:10.1111/mec.13185</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.relation.isreferencedby</td> 
              <td>PMID:25846956</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.subject</td> 
              <td>host-shifts</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.subject</td> 
              <td>population genetics</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.subject</td> 
              <td>invasion biology</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.subject</td> 
              <td>apiculture</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.subject</td> 
              <td>parasites</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dc.title</td> 
              <td>Data from: Multiple host-shifts by the emerging honeybee parasite, Varroa jacobsoni</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dc.type</td> 
              <td>Article</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dwc.ScientificName</td> 
              <td>Varroa jacobsoni</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dwc.ScientificName</td> 
              <td>Varroa destructor</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dwc.ScientificName</td> 
              <td>Apis mellifera</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dwc.ScientificName</td> 
              <td>Apis cerana</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>prism.publicationName</td> 
              <td>Molecular Ecology<img src="/themes/Mirage/images/authority_control/invisible.gif" class="ds-authority-confidence cf-accepted  " title="This controlled term has been confirmed by the user."> </td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dryad.dansTransferDate</td> 
              <td>2018-04-25T15:36:58.524+0000</td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row odd "> 
              <td>dryad.dansEditIRI</td> 
              <td>https://easy.dans.knaw.nl/sword2/container/3e576bf7-26e1-404c-9cc8-bc8bd53c9591<;/td> 
              <td></td> 
             </tr> 
             <tr xmlns:confman="org.dspace.core.ConfigurationManager" xmlns:xlink="http://www.w3.org/TR/xlink/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:dim="http://www.dspace.org/xmlns/dspace/dim" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:mets="http://www.loc.gov/METS/" xmlns:dri="http://di.tamu.edu/DRI/1.0/" xmlns:i18n="http://apache.org/cocoon/i18n/2.1" class="ds-table-row even "> 
              <td>dryad.dansArchiveDate</td> 
              <td>2018-04-25T18:10:28.981+0000</td> 
              <td></td> 
             </tr> 
            </tbody>
           </table> 
    

    其中 ,我要获取里面的 <td></td>标签中的内容,获取规则是这样, 以下面举例

          <td>dryad.dansEditIRI</td> 
              <td>https://easy.dans.knaw.nl/sword2/container/3e576bf7-26e1-404c-9cc8-bc8bd53c9591<;/td> 

    第一个<td>作为key,第二个<td>作为value,请问我是用正则表达式该怎样获取呢?或者有什么办法能够方便的取得这样的key-value值呢??

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    • -何必执着。 普通会员 1楼

      正则表达式(Regular Expression)是一种用于描述字符串模式的计算机程序。它允许我们使用字符集和结构来匹配、提取、替换和分割文本。

      正则表达式的基本语法如下:

      • .匹配任意字符
      • ()定义捕获组,用于存储匹配的结果
      • *表示前面的子表达式可以重复0次或更多次
      • +表示前面的子表达式可以重复1次或更多次
      • ?表示前面的子表达式可以重复0次或1次
      • {n}表示前面的子表达式需要重复n次
      • {n,}表示前面的子表达式需要重复n次到m次
      • |表示可以选择性地匹配其中的任意一个模式
      • \是转义字符,用于在字符串中创建特殊字符

      例如,如果你想匹配所有的"cat",你可以使用以下正则表达式:

      regex cat

      如果你想匹配所有的"dog",你可以使用以下正则表达式:

      regex dog

      如果你想匹配所有的"cat"和"dog",你可以使用以下正则表达式:

      regex cat|dog

      正则表达式在许多编程语言中都有内置的支持,例如Python的re模块,JavaScript的正则表达式等。如果你遇到正则表达式的问题,建议查阅相关文档或在线教程,或者寻求专业的帮助。

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