使用xslt删除xml中的重复项

问题描述：

我需要删除以下xml中的重复项：

I need to remove duplicates in the following xml:

<ListOfRowIDWithListOfBooks xmlns:bpws="http://schemas.xmlsoap.org/ws/2003/03/business-process/">
  <RowIDWithListOfBooks>
    <Row_ID>ADOA-XssK</Row_ID>
    <ListOfBookInfo>
      <book>
        <BookType>Brand</BookType>
        <BookName>jon</BookName>
      </book>
      <book>
        <BookType>Brand</BookType>
        <BookName>jon</BookName>
      </book>
    </ListOfBookInfo>
  </RowIDWithListOfBooks>
</ListOfRowIDWithListOfBooks>

有人可以帮忙吗？

答

可以使用标准分组解决方案轻松完成此任务。请勿使用单个select语句执行众所周知的会导致性能问题的操作。

This task can be easily achieved using standard grouping solutions. Do not use single select statements to do that which are well known to cause performance problems.

注意对的引用identity.xsl 只需在样式表中包含众所周知的身份转换

Note The reference to identity.xsl just include into the stylesheet the well known identity transformation template.

[XSLT 1.0]

<xsl:stylesheet version="1.0" 
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <xsl:key name="k-books" match="book" use="concat(BookType,'|',BookName)"/>

    <xsl:include href="identity.xsl"/>

    <xsl:template match="ListOfBookInfo">
        <ListOfBookInfo>
            <xsl:copy>
                <xsl:apply-templates select="book
                [generate-id()
                =generate-id(key('k-books',concat(BookType,'|',BookName))[1])]"/>
            </xsl:copy>
        </ListOfBookInfo>
    </xsl:template>

</xsl:stylesheet>

[XSLT 2.0]

<xsl:stylesheet version="2.0" 
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <xsl:include href="identity.xsl"/>

    <xsl:template match="ListOfBookInfo">
        <ListOfBookInfo>
            <xsl:for-each-group select="book" 
                group-by="concat(BookType,'|',BookName)">
                <xsl:apply-templates select="."/>
            </xsl:for-each-group>
        </ListOfBookInfo>
    </xsl:template>

</xsl:stylesheet>

使用xslt删除xml中的重复项

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