xslt – XSL在catalog.xml文件中显示最大份数

在这个catalog.xml文件中.我有两本书有相同的库存(即20).我想编写一个XSL文件,它将在目录中显示最大数量的书籍副本.如果有两本或更多相同库存的书籍,则必须显示它们.

<catalog>
  <Book>
    <sku>12345</sku>
    <title>Beauty Secrets</title>
    <condition>New</condition>
    <current_inventory>20</current_inventory>
    <price>99.99</price>
  </Book>
  <Book>
    <sku>54321</sku>
    <title>Picturescapes</title>
    <current_inventory>20</current_inventory>
    <condition>New</condition>
    <price>50.00</price>
  </Book> 
  <Book>
    <sku>33333</sku>
    <title>Tourist Perspectives</title>
    <condition>New</condition>
    <current_inventory>0</current_inventory>
    <price>75.00</price>
  </Book>
  <Book>
    <sku>10001</sku>
    <title>Fire in the Sky</title>
    <condition>Used</condition>
    <current_inventory>0</current_inventory>
    <price>10.00</price>
  </Book>
</catalog>

下面是我的catalog3.xsl文件,它只能显示两本书中的一本：

<xsl:stylesheet 
  version="1.0" 
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>
  <xsl:variable name="max"/>

  <xsl:template match="/">
    <html>
      <body>
        <h2>Titles of Books for which Most copies are Available</h2>
        <table border="2">
          <tr bgcolor="#9acd32">
            <th>Title</th>
            <th>No of copies</th>
          </tr>
          <xsl:apply-templates/>
        </table>
      </body>
    </html>
  </xsl:template>

  <xsl:template match="catalog">
    <xsl:for-each select="Book">
      <xsl:sort select="current_inventory" data-type="number" order="descending"/>
      <tr>
        <xsl:if test="position()= 1">
          <p><xsl:value-of select="$max = "/></p>
          <td><xsl:value-of select="title"/></td>
          <td><xsl:value-of select="current_inventory"/></td>
        </xsl:if>
      </tr>
    </xsl:for-each>
  </xsl:template>
</xsl:stylesheet>

任何人都可以纠正我实现我的目标,即在目录中显示具有相同最大库存的所有副本.谢谢.

最大current_inventory可以通过以下方式计算：

<xsl:variable name="max">
  <xsl:for-each select="/catalog/Book/current_inventory">
    <xsl:sort data-type="number" order="descending"/>
    <xsl:if test="position()=1"><xsl:value-of select="."/></xsl:if>
  </xsl:for-each>
</xsl:variable>

调整xsl的条件：if将for-each中当前节点的current_inventory与$max变量进行比较,可以获得所需的结果.

您正在评估for-each内部的position()= 1,这对于已排序集合中的第一个项目仅为true.

我将其设置为查找等于$max的current_inventory：

<xsl:if test="current_inventory = $max">

将这些更改应用于样式表：

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<!--Determine the maximum current_inventory -->
<xsl:variable name="max">
    <xsl:for-each select="/catalog/Book/current_inventory">
        <xsl:sort data-type="number" order="descending"/>
        <xsl:if test="position()=1"><xsl:value-of select="."/></xsl:if>
    </xsl:for-each>
</xsl:variable>

<xsl:template match="/">
    <html>
        <body>
            <h2>Titles of Books for which Most copies are Available</h2>
            <table border="2">
                <tr bgcolor="#9acd32">
                    <th>Title</th>
                    <th>No of copies</th>
                </tr>
                <xsl:apply-templates/>
            </table>
        </body>
    </html>
</xsl:template>
<xsl:template match="catalog">
    <xsl:for-each select="Book">
        <xsl:sort select="current_inventory" data-type="number" order="descending"/>

        <xsl:if test="current_inventory = $max">
                            <tr>
                <td>
                    <xsl:value-of select="title"/>
                </td>
                <td>
                    <xsl:value-of select="current_inventory"/>
                </td>
                            </tr>
        </xsl:if>

    </xsl:for-each>
</xsl:template>

xslt – XSL在catalog.xml文件中显示最大份数

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