如何使用 XSLT 删除重复节点？

【问题标题】：How to remove duplicate nodes using XSLT?如何使用 XSLT 删除重复节点？
【发布时间】：2009-06-20 23:18:27
【问题描述】：

如果系统发现重复，它应该完全消除两个节点。 我的原始 xml 为：

<?xml version="1.0" encoding="utf-8"?>
<RESPONSE>
  <RECORD>
    <COUNTRY_ID>2111</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2121</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2211</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2221</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3111</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3121</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3211</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3221</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2111</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2121</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2211</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2221</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2311</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>2321</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3111</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3121</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3211</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3221</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3311</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3321</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4111</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4121</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4211</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4221</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4311</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4321</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
</RESPONSE>

所需的输出应如下：

<?xml version="1.0" encoding="utf-8"?>
<RESPONSE>
<RECORD>
    <COUNTRY_ID>2311</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
<RECORD>
    <COUNTRY_ID>2321</COUNTRY_ID>
    <CITY id="2:">0</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
<RECORD>
    <COUNTRY_ID>3311</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>3321</COUNTRY_ID>
    <CITY id="3:">30</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4111</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4121</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="1:14404388">LA11CFTXX</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4211</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4221</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="2:14048042">LAZ1129YY</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4311</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="1:">1</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
  <RECORD>
    <COUNTRY_ID>4321</COUNTRY_ID>
    <CITY id="4:">100</CITY>
    <LOCATION id="3:14048629">LAZ11B91AA</LOCATION>
    <REPID id="2:">2</REPID>
    <FLIGHTID id="1:1091513">ALK</FLIGHTID>
  </RECORD>
</RESPONSE>

我们可以写一个 xsl 来做到这一点吗？

谢谢

【问题讨论】：

  • 你能定义重复吗？也许更紧凑的样本会更好。

标签： xml xslt


【解决方案1】：

试试这个：

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

  <xsl:template match="/">
    <xsl:apply-templates select="RESPONSE"/>
  </xsl:template>

  <xsl:template match="RESPONSE">
    <RESPONSE>
      <xsl:apply-templates select="RECORD"/>
    </RESPONSE>
  </xsl:template>

  <xsl:template match="RECORD">
    <xsl:variable name="this" select="."/>
    <xsl:variable name="country" select="COUNTRY_ID/text()"/>
    <xsl:if test="not(../RECORD[COUNTRY_ID/text() = $country and generate-id($this) != generate-id(.)])">
      <xsl:copy-of select="."/>
    </xsl:if>
  </xsl:template>

</xsl:stylesheet>

这都是假设当您说“重复”时，您的意思是 COUNTRY_ID 具有相同的内容。我的 XSLT 似乎可以生成您想要的输出。

【讨论】：

    【解决方案2】：

    此选择将为您提供何时存在重复的 COUNTRY_ID 的集合。 (> 1)

    select="/RESPONSE/RECORD/COUNTRY_ID/*[count(.|key('x',name())[1])>1]">

    使用该集合从您的选择中排除那些。

    我没有进行测试，但它应该为您提供了可以使用的集合。

    【讨论】：

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