这个是论坛里的问题，但这个功能经常遇到，贴出来供以后参考，这里的关键是XPATH的使用。

file1.xml

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<?xml version="1.0" encoding="utf-8" ?> 
 
<?xml-stylesheet type="text/xsl" href="xslt1.xsl"?> 
 
<staffs> 
 
  <staff order = "1"> 
 
    <name>wang </name> 
 
    <age>27 </age> 
 
  </staff> 
 
  <staff order = "2"> 
 
    <name>Li </name> 
 
    <age>24 </age> 
 
  </staff> 
 
  <staff order = "3"> 
 
    <name>Q1 </name> 
 
    <age>29 </age> 
 
  </staff> 
 
</staffs> 

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

<?xml-stylesheet type="text/xsl" href="xslt1.xsl"?>

<staffs>

  <staff order = "1">

    <name>wang </name>

    <age>27 </age>

  </staff>

  <staff order = "2">

    <name>Li </name>

    <age>24 </age>

  </staff>

  <staff order = "3">

    <name>Q1 </name>

    <age>29 </age>

  </staff>

</staffs>
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file2.xml 

file2.xmlview plaincopy to clipboardprint?
<PRE class=xml name="code"><?xml version="1.0" encoding="utf-8" ?> 
 
<staffs> 
 
  <staff order = "1"> 
 
    <name>wang </name> 
 
    <Money>100 </Money> 
 
  </staff> 
 
  <staff order = "2"> 
 
    <name>Li </name> 
 
    <Money>200 </Money> 
 
  </staff> 
 
  <staff order = "3"> 
 
    <name>Q1 </name> 
 
    <Money>400 </Money> 
 
  </staff> 
 
</staffs> 
</PRE> 
<PRE class=xml name="code">xslt1.xsl</PRE> 
<PRE class=xml name="code"><PRE class=xml name="code"><?xml version="1.0" encoding="utf-8" ?> 
 
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> 
 
<xsl:output  method="xml" omit-xml-declaration="yes"/> 
 
<xsl:variable name="file2" select="document('file2.xml')"/> 
 
<xsl:template match="/"> 
 
    <staffs> 
 
        <xsl:for-each select="/staffs/staff"> 
 
        <xsl:variable name="CurrentOrder"><xsl:value-of select = "attribute::order" /></xsl:variable> 
 
            <staff> 
 
                <xsl:attribute name="order"><xsl:value-of select="@order" /></xsl:attribute> 
 
                <xsl:copy-of select="name" /> 
 
                <xsl:copy-of select="age" /> 
 
                <xsl:copy-of select="$file2/staffs/staff[@order=$CurrentOrder]/Money" /> 
 
            </staff> 
 
        </xsl:for-each> 
 
    </staffs> 
 
</xsl:template> 
 
</xsl:stylesheet> 
 
</PRE> 
 
</PRE>