xml - 带计数的 XSLT 转换

Question

我将如何使用 xslt 转换以下内容

<blogger>
  <post>
    <text>...</text>
    <categories>Engineering, Internet, Sausages</catgories>
  </post>
  <post>
    <text>...</text>
    <categories>Internet, Sausages</catgories>
  </post>
  <post>
     <text>...</text>
     <categories>Sausages</catgories>
  </post>
</blogger>

进入

   Sausages (3)
   Internet (2)
   Engineering (1)

Answer 1

首先，改变你的xml

创建数据.xml

<blogger>
 <post>
     <text>...</text>
     <categories>
       <category>Engineering</category>
       <category>Internet</category>
       <category>Sausages</category>
     </categories>          
</post>
 <post>
     <text>...</text>
      <categories>
       <category>Internet</category>
       <category>Sausages</category>
      </categories>     
  </post>
 <post>
     <text>...</text>
     <categories>
      <category>Sausages</category>
     </categories>
 </post>
</blogger>

然后编写你的xslt，创建transform.xslt

<?xml version="1.0" encoding="iso-8859-1"?>
<xsl:stylesheet version="1.0" 
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>

<xsl:template match="/">

  <xsl:for-each select="//category">
   <xsl:variable name="value" select="."/>
   <xsl:if test="count(preceding::category[.=$value]) = 0">
    <xsl:value-of select="."/>
    <xsl:text> (</xsl:text>
    <xsl:value-of select="count(//category[.=$value])"/>     
    <xsl:text>)</xsl:text><br/>
   </xsl:if>
 </xsl:for-each>

 </xsl:template>
</xsl:stylesheet>

然后你可以在浏览器中打开data.xml，得到如下结果:

Engineering (1)Internet (2)Sausages (3)