Xml 如何在XSLT2.0中减去1天（计算前一天）？

有人能用XSLT 2.0帮助计算一天前从给定日期的

xsd:dateTime

类型吗

样本输入：

<?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>

<?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>

<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>

<?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>

2015-01-29T19:55:15.846Z

样本输出：

<?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>

<?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>

<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>

<?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>

2015-01-28819:55:15.846Z

我尝试了几件事，但没能得到我想要的：

<?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>

<?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>

<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>

<?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>

今天是：
1天前是：

给定您的输入XML，此XSLT转换：

<?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>

<?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>

<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>

<?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>

---

我猜这和日期格式有关。你有没有试过比你更好的

2015-01-28

或

2015-01-28-19:55

！这很有帮助。