如何在 XSLT 中对子节点求和

Question

我有传入的 xml XSLT 结构如下代码。

<?xml version="1.0" encoding="UTF-8"?>
<TimeAccount>
    <TimeAccount>
        <userId>123</userId>
        <timeAccountDetails>
            <TimeAccountDetail>
                <bookingType>MANUAL_ADJUSTMENT</bookingType>
                <bookingUnit>HOURS</bookingUnit>
                <bookingDate>2021-01-01T00:00:00.000</bookingDate>
                <bookingAmount>190</bookingAmount>
            </TimeAccountDetail>
            <TimeAccountDetail>
                <employeeTime>e885f88ccaa647abb00a8f84bcf5aa32</employeeTime>
                <bookingType>EMPLOYEE_TIME</bookingType>
                <bookingUnit>HOURS</bookingUnit>
                <bookingDate>2021-04-19T00:00:00.000</bookingDate>
                <bookingAmount>-8</bookingAmount>
            </TimeAccountDetail>
            <TimeAccountDetail>
                <employeeTime>e885f88ccaa647abb00a8f84bcf5aa32</employeeTime>
                <bookingType>MANUAL_ADJUSTMENT</bookingType>
                <bookingUnit>HOURS</bookingUnit>
                <bookingDate>2021-04-20T00:00:00.000</bookingDate>
                <bookingAmount>120</bookingAmount>
            </TimeAccountDetail>
            <TimeAccountDetail>
                <employeeTime>e885f88ccaa647abb00a8f84bcf5aa32</employeeTime>
                <bookingType>EMPLOYEE_TIME</bookingType>
                <bookingUnit>HOURS</bookingUnit>
                <bookingDate>2021-04-21T00:00:00.000</bookingDate>
                <bookingAmount>-8</bookingAmount>
            </TimeAccountDetail>
        </timeAccountDetails>
    </TimeAccount>
        <TimeAccount>
        <userId>456</userId>
        <timeAccountDetails>
            <TimeAccountDetail>
                <bookingType>MANUAL_ADJUSTMENT</bookingType>
                <bookingUnit>HOURS</bookingUnit>
                <bookingDate>2021-01-01T00:00:00.000</bookingDate>
                <bookingAmount>190</bookingAmount>
            </TimeAccountDetail>
            <TimeAccountDetail>
                <employeeTime>e885f88ccaa647abb00a8f84bcf5aa32</employeeTime>
                <bookingType>EMPLOYEE_TIME</bookingType>
                <bookingUnit>HOURS</bookingUnit>
                <bookingDate>2021-04-19T00:00:00.000</bookingDate>
                <bookingAmount>-8</bookingAmount>
            </TimeAccountDetail>
            <TimeAccountDetail>
                <bookingType>MANUAL_ADJUSTMENT</bookingType>
                <bookingUnit>HOURS</bookingUnit>
                <bookingDate>2021-06-01T00:00:00.000</bookingDate>
                <bookingAmount>100</bookingAmount>
            </TimeAccountDetail>
            <TimeAccountDetail>
                <employeeTime>e885f88ccaa647abb00a8f84bcf5aa32</employeeTime>
                <bookingType>EMPLOYEE_TIME</bookingType>
                <bookingUnit>HOURS</bookingUnit>
                <bookingDate>2021-04-21T00:00:00.000</bookingDate>
                <bookingAmount>-8</bookingAmount>
            </TimeAccountDetail>
        </timeAccountDetails>
    </TimeAccount>
</TimeAccount>

我希望通过为每个 userId 添加 bookingAmount 得到如下输出

<TimeAccount>
    <TimeAccount>
        <ID>123</ID>
        <bookingType>MANUAL_ADJUSTMENT</bookingType>
        <bookingAmount>310</bookingAmount>
    <TimeAccount>
        <TimeAccount>
        <ID>456</ID>
        <bookingType>MANUAL_ADJUSTMENT</bookingType>
        <bookingAmount>290</bookingAmount>
    <TimeAccount>
</TimeAccount>

我如下编写 xslt，使用 for-each 和 if 条件，然后使用 SUM 函数。

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:template match="/">
        <TimeAccount>
            <xsl:apply-templates/>
        </TimeAccount>
    </xsl:template>
    <xsl:template match="TimeAccount/TimeAccount">
        <TimeAccount>
          <ID><xsl:value-of select="userId"/></ID>         
          <bookingAmount>
            <xsl:for-each select="timeAccountDetails/TimeAccountDetail">
                <xsl:if test="bookingType != 'EMPLOYEE_TIME'">
                   <xsl:value-of select="sum(bookingAmount)"/> 
                </xsl:if>
            </xsl:for-each>
            </TimeAccount>
    </xsl:template>
</xsl:stylesheet>

但输出并没有添加 bookingAmounts 节点，而是并排打印节点。

<TimeAccount>
    <TimeAccount>
        <ID>123</ID>
        <bookingAmount>190 120</bookingAmount>
    <TimeAccount>
    <TimeAccount>
        <ID>456</ID>
        <bookingAmount>190 100</bookingAmount>
    <TimeAccount>
<TimeAccount>

我做错了什么？我尝试在预订金额之前保留 /，例如打印 null 的 sum(/bookingAmount)，如果我输入 // 那么它会打印所有用户的预订金额总数。

Answer 1

将您的 XSLT 代码更改为以下内容：

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <xsl:template match="/TimeAccount">
        <xsl:copy>
            <xsl:apply-templates select="TimeAccount" />
        </xsl:copy>
    </xsl:template>
    
    <xsl:template match="TimeAccount">
      <xsl:copy>
        <ID><xsl:value-of select="userId"/></ID> 
        <bookingType>MANUAL_ADJUSTMENT</bookingType>        
        <bookingAmount><xsl:value-of select="sum(timeAccountDetails/TimeAccountDetail[bookingType != 'EMPLOYEE_TIME']/bookingAmount)"/></bookingAmount>
      </xsl:copy>
    </xsl:template>
    
</xsl:stylesheet>

输出应该符合预期：

<?xml version="1.0"?>
<TimeAccount>
    <TimeAccount>
        <ID>123</ID>
        <bookingType>MANUAL_ADJUSTMENT</bookingType>
        <bookingAmount>310</bookingAmount>
    </TimeAccount>
    <TimeAccount>
        <ID>456</ID>
        <bookingType>MANUAL_ADJUSTMENT</bookingType>
        <bookingAmount>290</bookingAmount>
    </TimeAccount>
</TimeAccount>

我将 <bookingType> 固定为“MANUAL_ADJUSTMENT”，因为您只需要这些值（所有不是 EMPLOYEE_TIME 的值）。

顺便说一句，您只需要 XSLT-1.0 即可完成此任务。 XSLT-3.0 功能只是一个额外的好处。

Answer 2

这个 xslt 给出了预期的结果：

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="3.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  
  <xsl:output indent="yes"/>
  
  <xsl:mode on-no-match="shallow-copy"/>
  
  <xsl:template match="userId">
    <ID>
      <xsl:value-of select="text()"/>
    </ID>
  </xsl:template>
  
  <xsl:template match="timeAccountDetails">
    <bookingType>MANUAL_ADJUSTMENT</bookingType>
    <bookingAmount>
      <xsl:value-of select="sum(TimeAccountDetail[bookingType='MANUAL_ADJUSTMENT']/bookingAmount)"/>
    </bookingAmount>
  </xsl:template>
  
</xsl:stylesheet>

当您使用 xslt 3.0 时，您可以使用

<xsl:mode on-no-match="shallow-copy"/>

与以下相同：

<xsl:template match="@*|node()">
  <xsl:copy>
     <xsl:apply-templates select="@*|node()"/>
   </xsl:copy>
</xsl:template>

并且只会复制您没有模板匹配的任何内容。

如何在 XSLT 中对子节点求和

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