xml - 如何在 XSLT 2.0 中减去 1 天(计算前一天)？

Question

有人可以使用 XSLT 2.0 帮助计算 xsd:dateTime 类型的给定日期前的一天吗？

示例输入:

<?xml version="1.0" encoding="UTF-8"?>
<objects>
<LastRunTime__c>
<Last_Run_Time__c>2015-01-29T19:55:15.846Z</Last_Run_Time__c>
</LastRunTime__c>
</objects>

示例输出:

<?xml version="1.0" encoding="UTF-8"?>
<objects>
<LastRunTime__c>
<Last_Run_Time__c>2015-01-28T19:55:15.846Z</Last_Run_Time__c>
</LastRunTime__c>
</objects>

我尝试了一些方法，但未能得到我想要的:

<xsl:template match="/">
<xsl:variable name="vToday" select="/*:objects/*:LastRunTime__c/*:Last_Run_Time__c"/>
Today is: <xsl:sequence select="$vToday"/>
1 day ago it was: <xsl:sequence select="$vToday -1*xs:dayTimeDuration('P1D')"/>
</xsl:template>
</xsl:stylesheet>

Answer 1

给定您的输入 XML，此 XSLT 转换:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="2.0"
                xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsl:output method="text"/>
  <xsl:template match="/">
    <xsl:variable name="vToday" select="/objects/LastRunTime__c/Last_Run_Time__c" 
                  as="xsd:dateTime"/>
    Today is: <xsl:value-of select="$vToday"/>
    1 day ago it was: <xsl:value-of select="$vToday - xsd:dayTimeDuration('P1D')"/>
  </xsl:template>
</xsl:stylesheet>

将产生所需的输出:

    Today is: 2015-01-29T19:55:15.846Z
    1 day ago it was: 2015-01-28T19:55:15.846Z