Json 数据类型映射：查询键名称和返回值

我试图使用key name查询一个XML映射（用JSON将JSON文件解析为XML的结果），以在“for each”期间获取键值

我能够使用键索引进行查询，请参阅test-1。Test-2和Test-3失败了，但我认为在如何处理对XML映射的查询方面，我的语法是错误的

我让test-1保持激活状态，并注释掉test-2/test-3，因为该设置显示了想要的结果。余额并没有被使用，只是为了确保它不会传递给结果

JSON:

<data>
{
"period": {
      "0": {"startDate": "2016-01-01","endDate": "2016-12-31"},
      "1": {"startDate": "2015-01-01","endDate": "2015-12-31"}
    },

"balance": {
      "0": {"instant": "2016-01-01"},
      "1": {"instant": "2015-01-01"}
    }
}
</data>

<?xml version="1.0" encoding="UTF-8"?>

<xsl:transform version="3.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:map="http://www.w3.org/2005/xpath-functions/map"
  xmlns:root="http://www.example.com/1"
  xmlns:periods="http://www.example.com/2"
  expand-text="yes"
>

  <xsl:output method="xml" indent="yes"/>

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

    <!-- Parse JSON to XML -->

    <xsl:template match="data">
        <root:report>
          <xsl:apply-templates select="json-to-xml(.)/*"/>
        </root:report>
    </xsl:template>

    <!-- Process "period" -->

    <xsl:template match="*[@key = 'period']">

      <xsl:for-each select="./*">

            <periods:startDate>

          <!-- Test [1] -->
          <!-- Extract startDate value by index -->
          <xsl:value-of select="./*[1]"/>

          <!-- Test [2] -->
          <!-- Extract startDate value by name -->
          <!-- <xsl:value-of select="startDate"/> -->

          <!-- Test [3] -->
          <!-- Extract startDate by function map:get -->
          <!-- <xsl:variable name="$startDate" select="What to put here?"/>
          <xsl:value-of select="map:get($startDate)"/> -->

        </periods:startDate>

      </xsl:for-each>

    </xsl:template>

</xsl:transform>

{
“期间”：{
“0”：{“开始日期”：“2016-01-01”，“结束日期”：“2016-12-31”}，
“1”：{“开始日期”：“2015-01-01”，“结束日期”：“2015-12-31”}
},
“余额”：{
“0”：{“即时”：“2016-01-01”}，
“1”：{“即时”：“2015-01-01”}
}
}

XSL:

<data>
{
"period": {
      "0": {"startDate": "2016-01-01","endDate": "2016-12-31"},
      "1": {"startDate": "2015-01-01","endDate": "2015-12-31"}
    },

"balance": {
      "0": {"instant": "2016-01-01"},
      "1": {"instant": "2015-01-01"}
    }
}
</data>

<?xml version="1.0" encoding="UTF-8"?>

<xsl:transform version="3.0"
  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:map="http://www.w3.org/2005/xpath-functions/map"
  xmlns:root="http://www.example.com/1"
  xmlns:periods="http://www.example.com/2"
  expand-text="yes"
>

  <xsl:output method="xml" indent="yes"/>

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

    <!-- Parse JSON to XML -->

    <xsl:template match="data">
        <root:report>
          <xsl:apply-templates select="json-to-xml(.)/*"/>
        </root:report>
    </xsl:template>

    <!-- Process "period" -->

    <xsl:template match="*[@key = 'period']">

      <xsl:for-each select="./*">

            <periods:startDate>

          <!-- Test [1] -->
          <!-- Extract startDate value by index -->
          <xsl:value-of select="./*[1]"/>

          <!-- Test [2] -->
          <!-- Extract startDate value by name -->
          <!-- <xsl:value-of select="startDate"/> -->

          <!-- Test [3] -->
          <!-- Extract startDate by function map:get -->
          <!-- <xsl:variable name="$startDate" select="What to put here?"/>
          <xsl:value-of select="map:get($startDate)"/> -->

        </periods:startDate>

      </xsl:for-each>

    </xsl:template>

</xsl:transform>

想要的结果

<?xml version="1.0" encoding="UTF-8"?>
<root:report xmlns:map="http://www.w3.org/2005/xpath-functions/map"
             xmlns:periods="http://www.example.com/2"
             xmlns:root="http://www.example.com/1">
   <periods:startDate>2016-01-01</periods:startDate>
   <periods:startDate>2015-01-01</periods:startDate>
</root:report>

2016-01-01
2015-01-01

在for循环内部，如果要返回Map XML结构：

您将看到它如下所示：

<map xmlns="http://www.w3.org/2005/xpath-functions" key="0">
  <string key="startDate">2016-01-01</string>
  <string key="endDate">2016-12-31</string>
</map>