XSLT <xsl:for-each> 元素
<xsl:for-each> 元素允许您在 XSLT 中进行循环。
<xsl:for-each> 元素
XSL <xsl:for-each> 元素可用于选取指定的节点集中的每个 XML 元素:
实例
<?
xml
version
=
"
1.0
"
encoding
=
"
UTF-8
"
?>
<
xsl:stylesheet
version
=
"
1.0
"
xmlns:xsl
=
"
http://www.w3.org/1999/XSL/Transform
"
>
<
xsl:template
match
=
"
/
"
>
<
html
>
<
body
>
<
h2
>
My CD Collection
</
h2
>
<
table
border
=
"
1
"
>
<
tr
bgcolor
=
"
#9acd32
"
>
<
th
>
Title
</
th
>
<
th
>
Artist
</
th
>
</
tr
>
<
xsl:for-each
select
=
"
catalog/cd
"
>
<
tr
>
<
td
>
<
xsl:value-of
select
=
"
title
"
/>
</
td
>
<
td
>
<
xsl:value-of
select
=
"
artist
"
/>
</
td
>
</
tr
>
</
xsl:for-each
>
</
table
>
</
body
>
</
html
>
</
xsl:template
>
</
xsl:stylesheet
>
尝试一下 »
注意: select 属性的值是一个 XPath 表达式。这个 XPath 表达式的工作方式类似于定位某个文件系统,在其中正斜杠(/)可选择子目录。
过滤输出结果
通过在 <xsl:for-each> 元素中添加一个选择属性的判别式,我们也可以过滤从 XML 文件输出的结果。
<xsl:for-each select="catalog/cd[artist='Bob Dylan']">
合法的过滤运算符:
- = (等于)
- != (不等于)
- < (小于)
- > (大于)
看看调整后的 XSL 样式表:
实例
<?
xml
version
=
"
1.0
"
encoding
=
"
UTF-8
"
?>
<
xsl:stylesheet
version
=
"
1.0
"
xmlns:xsl
=
"
http://www.w3.org/1999/XSL/Transform
"
>
<
xsl:template
match
=
"
/
"
>
<
html
>
<
body
>
<
h2
>
My CD Collection
</
h2
>
<
table
border
=
"
1
"
>
<
tr
bgcolor
=
"
#9acd32
"
>
<
th
>
Title
</
th
>
<
th
>
Artist
</
th
>
</
tr
>
<
xsl:for-each
select
=
"
catalog/cd[artist='Bob Dylan']
"
>
<
tr
>
<
td
>
<
xsl:value-of
select
=
"
title
"
/>
</
td
>
<
td
>
<
xsl:value-of
select
=
"
artist
"
/>
</
td
>
</
tr
>
</
xsl:for-each
>
</
table
>
</
body
>
</
html
>
</
xsl:template
>
</
xsl:stylesheet
>
尝试一下 »