计算相同标签的总数

Question

请告知我如何实现以下转换。

我输入的 xml 格式。

 <Employees>
     <Employee>
            <Name>Don</Name>
            <Salary>5000</Salary>
            <Expense>1000</Expense>
            <Expense>500</Expense>
            <Expense>300</Expense>
    </Employee>
     <Employee>
            <Name>John</Name>
            <Salary>5000</Salary>
            <Expense>100</Expense>
            <Expense>400</Expense>
            <Tax>500</Tax>
            <Tax>200</Tax>
    </Employee>

输出应该是

<Employees>
     <Employee>
            <Name>Don</Name>
            <Salary>5000</Salary>
            <Expense>1800</Expense>
    </Employee>
     <Employee>
            <Name>John</Name>
            <Salary>6000</Salary>
            <Expense>500</Expense>
            <Tax>700</Tax>
    </Employee>

谢谢

Answer 1

我相信我会这样做：

XSLT 1.0

<xsl:stylesheet version="1.0" 
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="utf-8" indent="yes"/>

<xsl:template match="/Employees">
    <Employees>
        <xsl:for-each select="Employee">
            <Employee>
                <xsl:copy-of select="Name"/>
                <Salary>
                    <xsl:value-of select="sum(Salary)"/>
                </Salary>
                <Expense>
                    <xsl:value-of select="sum(Expense)"/>
                </Expense>
                <Tax>
                    <xsl:value-of select="sum(Tax)"/>
                </Tax>              
            </Employee>
        </xsl:for-each>
    </Employees>
</xsl:template>

</xsl:stylesheet>

结果（与预期略有不同）：

<?xml version="1.0" encoding="utf-8"?>
<Employees>
   <Employee>
      <Name>Don</Name>
      <Salary>5000</Salary>
      <Expense>1800</Expense>
      <Tax>0</Tax>
   </Employee>
   <Employee>
      <Name>John</Name>
      <Salary>5000</Salary>
      <Expense>500</Expense>
      <Tax>700</Tax>
   </Employee>
</Employees>

---

如果您愿意，可以有条件地输出任何或所有摘要，例如

<xsl:if test="Tax">
    <Tax>
        <xsl:value-of select="sum(Tax)"/>
    </Tax>  
</xsl:if>   

Answer 2

您没有明确表明您尝试自己编写 XSLT 代码。我将向您展示如何处理Expense 元素。写

• 执行身份转换以复制整个输入的模板
• 匹配第一个 Expense 元素的模板，并使其内容为其父元素的所有 Expense 子元素的总和
• 一个匹配后续 Expense 元素并且什么都不做的模板

XML 输入

假设以下格式正确的输入（在末尾添加</Employees>）：

<Employees>
     <Employee>
            <Name>Don</Name>
            <Salary>5000</Salary>
            <Expense>1000</Expense>
            <Expense>500</Expense>
            <Expense>300</Expense>
    </Employee>
     <Employee>
            <Name>John</Name>
            <Salary>5000</Salary>
            <Expense>100</Expense>
            <Expense>400</Expense>
            <Tax>500</Tax>
            <Tax>200</Tax>
    </Employee>
</Employees>

样式表

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

 <xsl:output method="xml" indent="yes" omit-xml-declaration="no" encoding="utf-8"/>
 <xsl:strip-space elements="*"/>

 <xsl:template match="@*|node()">
   <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
   </xsl:copy>
 </xsl:template>

 <xsl:template match="Expense[1]">
   <xsl:copy>
      <xsl:value-of select="sum(../Expense)"/>
   </xsl:copy>
 </xsl:template>

 <xsl:template match="Expense"/>

</xsl:stylesheet>

XML 输出

<?xml version="1.0" encoding="utf-8"?>
<Employees>
   <Employee>
      <Name>Don</Name>
      <Salary>5000</Salary>
      <Expense>1800</Expense>
   </Employee>
   <Employee>
      <Name>John</Name>
      <Salary>5000</Salary>
      <Expense>500</Expense>
      <Tax>500</Tax>
      <Tax>200</Tax>
   </Employee>
</Employees>

---

要将这种处理应用于Employee 的任何子级，请使用类似

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

 <xsl:output method="xml" indent="yes" omit-xml-declaration="no" encoding="utf-8"/>
 <xsl:strip-space elements="*"/>

 <xsl:template match="@*|node()">
   <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
   </xsl:copy>
 </xsl:template>

 <xsl:template match="*/*/*[count(../*[name() = current()/name()]) &gt; 1 and not(preceding-sibling::*[name() = current()/name()] ) ] ">
         <xsl:element name="{name()}">
            <xsl:value-of select="sum(../*[name() = current()/name()])"/>
         </xsl:element>
 </xsl:template>

 <xsl:template match="*/*/*[preceding-sibling::*[name() = current()/name()]]"/>

</xsl:stylesheet>

结果

<?xml version="1.0" encoding="utf-8"?>
<Employees>
   <Employee>
      <Name>Don</Name>
      <Salary>5000</Salary>
      <Expense>1800</Expense>
   </Employee>
   <Employee>
      <Name>John</Name>
      <Salary>5000</Salary>
      <Expense>500</Expense>
      <Tax>700</Tax>
   </Employee>
</Employees>

并且还显示您的预期输出是错误的 - John 的工资当然应该保持 5000，而不是更改为 6000。