在
XSLT 2.0sum()XSLT 1.0<?xml version="1.0" encoding="UTF-8"?>
<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"/>
<!-- Identity template -->
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()" />
</xsl:copy>
</xsl:template>
<!-- Rename root node -->
<xsl:template match="Process">
<ProcessResponse>
<xsl:apply-templates select="@*|node()" />
</ProcessResponse>
</xsl:template>
<!-- Match on ListOfItems, to add new elements after it -->
<xsl:template match="ListOfItems">
<!-- Copy existing -->
<xsl:copy>
<xsl:apply-templates select="@*|node()" />
</xsl:copy>
<!-- Create the new elements -->
<xsl:apply-templates select="item[1]" mode="sumValue" />
</xsl:template>
<!-- Match on item element to do the calculation of value attribute -->
<xsl:template match="item">
<xsl:copy>
<!-- Copy existing attributes -->
<xsl:apply-templates select="@*" />
<!-- Actual calculation -->
<xsl:attribute name="value">
<xsl:value-of select="@quantity * @price" />
</xsl:attribute>
<!-- Copy rest of nodes -->
<xsl:apply-templates select="node()" />
</xsl:copy>
</xsl:template>
<xsl:template match="item" mode="sumValue">
<xsl:param name="currentSumValue" select="0" />
<!-- Variable to store the updated sum value -->
<xsl:variable name="updatedSumValue" select="$currentSumValue + (@quantity * @price)" />
<!-- Proceed summing with the next item-->
<xsl:apply-templates select="following-sibling::item[1]" mode="sumValue">
<xsl:with-param name="currentSumValue" select="$updatedSumValue" />
</xsl:apply-templates>
<!-- No more items. Summing is complete, we can display the totalAmount and calculate the rest -->
<xsl:if test="not(following-sibling::item)">
<totalAmount><xsl:value-of select="$updatedSumValue"/></totalAmount>
<!-- taxAmount -->
<xsl:variable name="taxAmount">
<xsl:choose>
<xsl:when test="/Process/taxType = 'TEN'">
<xsl:value-of select="$updatedSumValue * (10 div 100)" />
</xsl:when>
<xsl:otherwise>
<xsl:value-of select="$updatedSumValue" />
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<taxAmount><xsl:value-of select="$taxAmount" /></taxAmount>
<!-- grandTotal -->
<grandTotal><xsl:value-of select="$updatedSumValue + $taxAmount" /></grandTotal>
</xsl:if>
</xsl:template>
<!-- Remove element taxType -->
<xsl:template match="taxType" />
</xsl:stylesheet>
当应用于您的输入 XML 时，结果将是：
<?xml version="1.0" encoding="UTF-8"?>
<ProcessResponse>
<name>name1</name>
<ListOfItems>
<item name="name2" price="10" quantity="1" value="10"/>
<item name="name7" price="10" quantity="2" value="20"/>
<item name="name12" price="10" quantity="3" value="30"/>
<item name="name17" price="10" quantity="4" value="40"/>
</ListOfItems>
<totalAmount>100</totalAmount>
<taxAmount>10</taxAmount>
<grandTotal>110</grandTotal>
</ProcessResponse>
希望对您有所帮助，并且 de XSLT 中的注释对您有所帮助...
另一个使用XSLT 1.0的版本，但它使用了扩展功能
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:ext="http://exslt.org/common"
exclude-result-prefixes="ext"
version="1.0">
<xsl:template match="@*|node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:variable name="tmpvalue">
<xsl:for-each select="//item">
<value><xsl:value-of select="@price*@quantity"/></value>
</xsl:for-each>
</xsl:variable>
<xsl:variable name="taxAmount">
<!-- set you tax formula here -->
<xsl:value-of select="'10'"/>
</xsl:variable>
<xsl:template match="Process">
<ProcessResponse>
<xsl:apply-templates/>
<totalAmount>
<xsl:variable name="myValue" select="ext:node-set($tmpvalue)"/>
<xsl:value-of select="sum($myValue/value)"/>
</totalAmount>
<taxAmount><xsl:value-of select="$taxAmount"/></taxAmount>
<grandTotal>
<xsl:variable name="myValue" select="ext:node-set($tmpvalue)"/>
<xsl:value-of select="sum($myValue/value) + $taxAmount"/>
</grandTotal>
</ProcessResponse>
</xsl:template>
<xsl:template match="item">
<xsl:copy>
<xsl:apply-templates select="@*"/>
<xsl:attribute name="value"><xsl:value-of select="@price*@quantity"/></xsl:attribute>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
我也会使用 EXSLT node-set() 函数，只是模板更少：
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:exsl="http://exslt.org/common"
extension-element-prefixes="exsl">
<xsl:output method="xml" version="1.0" encoding="utf-8" indent="yes"/>
<xsl:param name="taxRate" select=".06"/>
<xsl:template match="/Process">
<ProcessResponse>
<xsl:copy-of select="name"/>
<!-- pre-process items -->
<xsl:variable name="items">
<xsl:for-each select="ListOfItems/item">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:attribute name="value">
<xsl:value-of select="@price*@quantity" />
</xsl:attribute>
</xsl:copy>
</xsl:for-each>
</xsl:variable>
<xsl:variable name="total" select="sum(exsl:node-set($items)/item/@value)" />
<!-- output -->
<ListOfItems>
<xsl:copy-of select="$items"/>
</ListOfItems>
<totalAmount>
<xsl:value-of select="$total" />
</totalAmount>
<taxAmount>
<xsl:value-of select="$total * $taxRate" />
</taxAmount>
<grandTotal>
<xsl:value-of select="$total * (1 + $taxRate)" />
</grandTotal>
</ProcessResponse>
</xsl:template>
</xsl:stylesheet>
如果你的处理器恰好支持EXSLT dyn:map() 扩展函数，那么你还有另一种方法可以得到预期的结果：
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:dyn="http://exslt.org/dynamic"
extension-element-prefixes="dyn">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:param name="taxRate" select=".06"/>
<xsl:template match="/Process">
<ProcessResponse>
<xsl:copy-of select="name"/>
<ListOfItems>
<xsl:for-each select="ListOfItems/item">
<xsl:copy>
<xsl:copy-of select="@*"/>
<xsl:attribute name="extprice">
<xsl:value-of select="@price * @quantity" />
</xsl:attribute>
</xsl:copy>
</xsl:for-each>
</ListOfItems>
<xsl:variable name="total" select="sum(dyn:map(ListOfItems/item, '@price * @quantity'))" />
<total>
<xsl:value-of select="$total" />
</total>
<tax>
<xsl:value-of select="$total * $taxRate" />
</tax>
<grandTotal>
<xsl:value-of select="$total * (1 + $taxRate)" />
</grandTotal>
</ProcessResponse>
</xsl:template>
</xsl:stylesheet>