[英]XSLT Remove leading and trailing whitespace of all attributes
How can I create an identical XML sheet, but with the leading and trailing whitespaces of each attribute removed? 如何创建相同的XML工作表,但删除了每个属性的前导和尾随空格? (using XSLT 2.0) (使用XSLT 2.0)
Go from this: 从这里开始:
<node id="DSN ">
<event id=" 2190 ">
<attribute key=" Teardown"/>
<attribute key="Resource "/>
</event>
</node>
To this: 对此:
<node id="DSN">
<event id="2190">
<attribute key="Teardown"/>
<attribute key="Resource"/>
</event>
</node>
I suppose I'd prefer to use the normalize-space()
function, but whatever works.我想我更喜欢使用 normalize-space()
函数,但无论如何都可以。
normalize-space()
will not only remove leading and trailing whitespace, but it will also install a single space character in place of any sequence of consecutive whitespace characters. normalize-space()
不仅会删除前导空格和尾随空格,还会安装一个空格字符来代替任何连续的空白字符序列。
A regular expression can be used to handle just leading and trailing whitespace: 正则表达式可用于处理前导和尾随空格:
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
<xsl:template match="node()">
<xsl:copy>
<xsl:apply-templates select="@*|node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="@*">
<xsl:attribute name="{local-name()}" namespace="{namespace-uri()}">
<xsl:value-of select="replace(., '^\s+|\s+$', '')"/>
</xsl:attribute>
</xsl:template>
</xsl:stylesheet>
This should do it: 这应该这样做:
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="yes" omit-xml-declaration="yes"/>
<xsl:template match="node()">
<xsl:copy>
<xsl:apply-templates select="@* | node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="@*">
<xsl:attribute name="{name()}">
<xsl:value-of select="normalize-space()"/>
</xsl:attribute>
</xsl:template>
</xsl:stylesheet>
This is also XSLT 1.0 compatible. 这也是XSLT 1.0兼容的。
When run on your sample input, the result is: 在样本输入上运行时,结果为:
<node id="DSN">
<event id="2190">
<attribute key="Teardown" />
<attribute key="Resource" />
</event>
</node>
One thing to note here is that normalize-space()
will turn any whitespace within the attribute values into single spaces, so this: 这里需要注意的一点是, normalize-space()
会将属性值中的任何空格转换为单个空格,因此:
<element attr=" this is an
attribute " />
Would be changed to this: 将改为:
<element attr="this is an attribute" />
If you need to keep whitespace within the value as-is, then please see Gunther's answer. 如果您需要将空格保持在该值内,那么请参阅Gunther的答案。
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