XPath表达式选择除特定列表之外的所有XML子节点?

Jef*_*ang 17 xslt xpath

这是示例数据:

<catalog>
    <cd>
        <title>Empire Burlesque</title>
        <artist>Bob Dylan</artist>
        <country>USA</country>
                <customField1>Whatever</customField1>
                <customField2>Whatever</customField2>
                <customField3>Whatever</customField3>
        <company>Columbia</company>
        <price>10.90</price>
        <year>1985</year>
    </cd>
    <cd>
        <title>Hide your heart</title>
        <artist>Bonnie Tyler</artist>
        <country>UK</country>
                <customField1>Whatever</customField1>
                <customField2>Whatever</customField2>
        <company>CBS Records</company>
        <price>9.90</price>
        <year>1988</year>
    </cd>
    <cd>
        <title>Greatest Hits</title>
        <artist>Dolly Parton</artist>
        <country>USA</country>
                <customField1>Whatever</customField1>
        <company>RCA</company>
        <price>9.90</price>
        <year>1982</year>
    </cd>
</catalog>
Run Code Online (Sandbox Code Playgroud)

假设我想选择除价格和年份元素之外的所有内容.我希望写下面的内容,显然不起作用.

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

<xsl:template match="/">
  <html>
  <body>
  <xsl:for-each select="//cd/* except (//cd/price|//cd/year)">
    Current node: <xsl:value-of select="current()"/>
    <br />
  </xsl:for-each>
  </body>
  </html>
</xsl:template>
</xsl:stylesheet>
Run Code Online (Sandbox Code Playgroud)

请帮我找一种排除某些子元素的方法.

Tom*_*lak 38

<xsl:for-each select="//cd/*[not(self::price or self::year)]">
Run Code Online (Sandbox Code Playgroud)

但实际上这很糟糕且不必要地复杂化.更好:

<xsl:template match="catalog">
  <html>
    <body>
      <xsl:apply-templates select="cd/*" />
    </body>
  </html>
</xsl:template>

<!-- this is an empty template to mute any unwanted elements -->
<xsl:template match="cd/price | cd/year" />

<!-- this is to output wanted elements -->
<xsl:template match="cd/*">
  <xsl:text>Current node: </xsl:text>
  <xsl:value-of select="."/>
  <br />
</xsl:template>
Run Code Online (Sandbox Code Playgroud)

避免<xsl:for-each>.几乎所有的时间它都是错误的工具,应该用<xsl:apply-templates>和替换<xsl:template>.

由于匹配表达特异性,上述工作原理.match="cd/price | cd/year"比更具体的match="cd/*",所以它是优选的模板cd/pricecd/year元件.不要试图排除节点,让它们通过丢弃它们来处理它们.


ndi*_*dim 9

我开始尝试类似的东西

"//cd/*[(name() != 'price') and (name() != 'year')]"
Run Code Online (Sandbox Code Playgroud)

或者,你只是做正常的递归模板匹配<xsl:apply-templates/>,然后对空模板<price/><year/>元素:

<xsl:template match="price"/>
<xsl:template match="year"/>
Run Code Online (Sandbox Code Playgroud)