如何实现“if else if else"XSLT 中的条件 [英] How to implement "if else if else" condition in XSLT

问题描述

是否可以在 xsl 中实现if else, if else"?例如我有数据:

Is it possible to implement "if else, if else" in xsl? for example I have data:

<document>
    <line>
        <name>MAR111</name>
        <value>1</value>
    </line>

    <line>
        <name>MAR111</name>
        <value>3</value>
    </line>
    <line>
        <name>MEA111</name>
        <value>1</value>
    </line>
    <line>
        <name>MPR111</name>
        <value>1</value>
    </line>
    <line>
        <name>MEA111</name>
        <value>4</value>
    </line>
    <line>
        <name>MPR111</name>
        <value>2</value>
    </line>
</document>

我需要获得具有三个名称的三个文档模板:

I need to get three document templates with three names:

<document>
    <MAR>
        <name>MAR111</name>
        <number>1</number>
        <number>4</number>
    </MAR>
</document>
<document>
    <MEA>
        <name>MEA111</name>
        <number>1</number>
        <number>4</number>
    </MEA>
</document>
<document>
    <MPR>
        <name>MPR111</name>
        <number>1</number>
        <number>2</number>
    </MPR>
</document>

我尝试在应用模板上使用选择，何时"，但也许有更好的方法:

I try to use "choose, when" on apply template, but maybe there is a better way:

<xsl:template match="/">
    <xsl:choose>
        <xsl:when test="/document/line/name='MEA111'">
            <xsl:apply-templates mode="MEA" select="/document"/>
        </xsl:when>
    </xsl:choose>
    <xsl:choose>
        <xsl:when test="/document/line/name='MPR111'">
            <xsl:apply-templates mode="MPR" select="/document"/>
        </xsl:when>
    </xsl:choose>
    <xsl:choose>
        <xsl:when test="/document/line/name='MAR111'">
            <xsl:apply-templates mode="MAR" select="/document"/>
        </xsl:when>
    </xsl:choose>
</xsl:template>

推荐答案

其实你可以把它们合并在一起:

Actually you can merge them together:

<xsl:template match="/">
    <xsl:choose>
        <xsl:when test="/document/line/name='MEA111'">
            <xsl:apply-templates mode="MEA" select="/document"/>
        </xsl:when>
        <xsl:when test="/document/line/name='MPR111'">
            <xsl:apply-templates mode="MPR" select="/document"/>
        </xsl:when>
        <xsl:when test="/document/line/name='MAR111'">
            <xsl:apply-templates mode="MAR" select="/document"/>
        </xsl:when>
    </xsl:choose>
</xsl:template>

Petras，在您澄清之后，您想要的似乎更容易:

Petras, after your clarification, it seems that what you want is even easier:

<xsl:template match="/">
    <xsl:if test="/document/line/name='MEA111'">
       <xsl:apply-templates mode="MEA" select="/document"/>
    </xsl:if>
    <xsl:if test="/document/line/name='MPR111'">
        <xsl:apply-templates mode="MPR" select="/document"/>
    </xsl:if>
    <xsl:if test="/document/line/name='MAR111'">
        <xsl:apply-templates mode="MAR" select="/document"/>
    </xsl:if>
</xsl:template>

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