XSLT将同名的同级节点的值合并/合并为单个节点 [英] XSLT merging/concatenating values of siblings nodes of same name into single node
本文介绍了XSLT将同名的同级节点的值合并/合并为单个节点的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
输入xml
<catalog>
<product id="1">
<name>abc</name>
<category>aaa</category>
<category>bbb</category>
<category>ccc</category>
</product>
<product id="2">
<name>cde</name>
<category>aaa</category>
<category>bbb</category>
</product>
</catalog>
预期的输出xml
<products>
<product>
<id>1</id>
<name>abc</name>
<category>aaa,bbb,ccc</category>
</product>
<product>
<id>2</id>
<name>cde</name>
<category>aaa,bbb</category>
</product>
</products>
用于转换的XSLT
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/catalog">
<products>
<xsl:for-each select="product">
<product>
<id><xsl:value-of select="@id"/></id>
<name><xsl:value-of select="name"/></name>
<category><xsl:value-of select="category" /></category>
</product>
</xsl:for-each>
</products>
</xsl:template>
</xsl:stylesheet>
实际输出xml:(
<products>
<product>
<id>1</id>
<name>abc</name>
<category>aaa</category>
</product>
<product>
<id>2</id>
<name>cde</name>
<category>aaa</category>
</product>
</products>
在每个产品"下的名称为"category"的所有同级节点中循环并合并/合并为由逗号分隔的单个节点时所需的代码.每种产品的类别"数量各不相同,因此计数是未知的.
Code needed in looping through all sibling node by the name 'category' under every 'product' and merging/concatenating into single node separated by a comma. Number of 'category' varies for every product and hence the count is unknown.
推荐答案
Using this handy join call-template defined here, this becomes as simple as:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes"/>
<xsl:template match="/catalog">
<products>
<xsl:for-each select="product">
<product>
<id>
<xsl:value-of select="@id"/>
</id>
<name>
<xsl:value-of select="name"/>
</name>
<category>
<xsl:call-template name="join">
<xsl:with-param name="list" select="category" />
<xsl:with-param name="separator" select="','" />
</xsl:call-template>
</category>
</product>
</xsl:for-each>
</products>
</xsl:template>
<xsl:template name="join">
<xsl:param name="list" />
<xsl:param name="separator"/>
<xsl:for-each select="$list">
<xsl:value-of select="." />
<xsl:if test="position() != last()">
<xsl:value-of select="$separator" />
</xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
输出:
<products>
<product>
<id>1</id>
<name>abc</name>
<category>aaa,bbb,ccc</category>
</product>
<product>
<id>2</id>
<name>cde</name>
<category>aaa,bbb</category>
</product>
</products>
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