XSLT需求：将分组group节点移至data父节点并移除request节点

原始XML数据 #

<data>
    <request method="PUT">
        <context>
            <record_count>5</record_count>
            <record_type>Customer</record_type>
        </context>
        <value>
            <company>ABC</company>
            <customer>Contoso</customer>
        </value>
        <value>
            <company>ABC</company>
            <customer>Forest</customer>
        </value>
        <value>
            <company>XYZ</company>
            <customer>Forest</customer>
        </value>
        <value>
            <company>XYZ</company>
            <customer>Cave</customer>
        </value>
        <value>
            <company>ABC</company>
            <customer>Cave</customer>
        </value>
    </request>
</data>

现有XSLT转换代码 #

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:key name="company-key" match="value" use="company"/>
    <xsl:template match="@*|node()">
        <xsl:copy>
            <xsl:apply-templates select="@*" />         
            <xsl:apply-templates />
        </xsl:copy>
    </xsl:template>
    <xsl:template match="/data/request/value" />
    <xsl:template match="/data/request/value[count(. | key('company-key', company)[1]) = 1]">
        <xsl:element name="group">
            <xsl:attribute name="company">
                <xsl:value-of select="company"/>
            </xsl:attribute>
            <xsl:attribute name="method">
                <xsl:value-of select="/data/request/@method"/>
            </xsl:attribute>
            <xsl:attribute name="record-type">
                <xsl:value-of select="/data/request/context/record_type"/>
            </xsl:attribute>
            <xsl:for-each select="key('company-key', company)">
                <xsl:copy>
                    <xsl:apply-templates select="@*|node()"/>
                </xsl:copy>
            </xsl:for-each>
        </xsl:element>
    </xsl:template>
</xsl:stylesheet>

现有转换输出 #

<data>
    <request method="PUT">
        <context>
            <record_count>5</record_count>
            <record_type>Customer</record_type>
        </context>
        <group company="ABC" method="PUT" record-type="Customer">
            <value>
                <company>ABC</company>
                <customer>Contoso</customer>
            </value>
            <value>
                <company>ABC</company>
                <customer>Forest</customer>
            </value>
            <value>
                <company>ABC</company>
                <customer>Cave</customer>
            </value>
        </group>     
        <group company="XYZ" method="PUT" record-type="Customer">
            <value>
                <company>XYZ</company>
                <customer>Forest</customer>
            </value>
            <value>
                <company>XYZ</company>
                <customer>Cave</customer>
            </value>
        </group>       
    </request>
</data>

期望输出 #

<data>
    <group company="ABC" method="PUT" record-type="Customer">
        <value>
            <company>ABC</company>
            <customer>Contoso</customer>
        </value>
        <value>
            <company>ABC</company>
            <customer>Forest</customer>
        </value>
        <value>
            <company>ABC</company>
            <customer>Cave</customer>
        </value>
    </group>
    <group company="XYZ" method="PUT" record-type="Customer">
        <value>
            <company>XYZ</company>
            <customer>Forest</customer>
        </value>
        <value>
            <company>XYZ</company>
            <customer>Cave</customer>
        </value>
    </group>
</data>

修改后的XSLT代码 #

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <!-- 按company分组的键 -->
    <xsl:key name="company-key" match="value" use="company"/>

    <!-- 基础复制模板，默认复制节点和属性 -->
    <xsl:template match="@*|node()">
        <xsl:copy>
            <xsl:apply-templates select="@*"/>
            <xsl:apply-templates/>
        </xsl:copy>
    </xsl:template>

    <!-- 重写data节点的处理逻辑，直接生成包含group的data -->
    <xsl:template match="/data">
        <data>
            <!-- 遍历每个分组的首个value节点，生成对应的group -->
            <xsl:for-each select="request/value[count(. | key('company-key', company)[1]) = 1]">
                <group company="{company}"
                       method="{/data/request/@method}"
                       record-type="{/data/request/context/record_type}">
                    <!-- 复制当前分组下的所有value节点 -->
                    <xsl:apply-templates select="key('company-key', company)"/>
                </group>
            </xsl:for-each>
        </data>
    </xsl:template>

    <!-- 直接移除整个request节点 -->
    <xsl:template match="/data/request"/>
</xsl:stylesheet>

代码说明 #

• 重写/data节点模板，直接在新生成的data节点内处理分组逻辑，让group直接成为data的子节点。
• 使用属性值模板（{}）简化group属性的赋值，代码更简洁直观。
• 添加匹配/data/request的空模板，直接移除整个request节点及其内部未用到的内容。
• 保留基础复制模板，确保value节点的内容能正常复制到group内部。

内容的提问来源于stack exchange，提问作者Paja