我是XSLT的新手，在尝试格式化具有递归节点的XML文档时遇到一些问题。
我的XML代码：
希望我的XML显示：
所有<item>都嵌套有<items>
一个项目可以仅具有属性，也可以具有子节点
嵌套<item>节点的级别可以无限深
<?xml version="1.0" encoding="utf-8" ?>
- <items>
<item groupID="1" name="Home" url="//" />
- <item groupID="2" name="Guides" url="/Guides/">
- <items>
- <item groupID="26" name="Online-Poker-Guide" url="/Guides/Online-Poker-Guide/">
- <items>
- <item>
<id>107</id>
- <title>
- <![CDATA[ Poker Betting - Online Poker Betting Structures
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/online-poker-betting-structures
]]>
</url>
</item>
- <item>
<id>114</id>
- <title>
- <![CDATA[ Beginners' Poker - Poker Hand Ranking
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/online-poker-hand-ranking
]]>
</url>
</item>
- <item>
<id>115</id>
- <title>
- <![CDATA[ Poker Terms - 4th Street and 5th Street
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/online-poker-poker-terms
]]>
</url>
</item>
- <item>
<id>116</id>
- <title>
- <![CDATA[ Popular Poker - The Popularity of Texas Hold'em
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/online-poker-popularity-texas-holdem
]]>
</url>
</item>
- <item>
<id>364</id>
- <title>
- <![CDATA[ The Impact of Traditional Poker on Online Poker (and vice versa)
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/online-poker-tradional-vs-online
]]>
</url>
</item>
- <item>
<id>365</id>
- <title>
- <![CDATA[ The Ultimate, Absolute Online Poker Scandal
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/online-poker-scandal
]]>
</url>
</item>
</items>
- <items>
- <item groupID="27" name="Beginners-Poker" url="/Guides/Online-Poker-Guide/Beginners-Poker/">
- <items>
+ <item>
<id>101</id>
- <title>
- <![CDATA[ Poker Betting - All-in On the Flop
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/poker-betting-all-in-on-the-flop
]]>
</url>
</item>
+ <item>
<id>102</id>
- <title>
- <![CDATA[ Beginners' Poker - Choosing an Online Poker Room
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/beginners-poker-choosing-a-room
]]>
</url>
</item>
+ <item>
<id>105</id>
- <title>
- <![CDATA[ Beginners' Poker - Choosing What Type of Poker to Play
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/beginners-poker-choosing-type-to-play
]]>
</url>
</item>
+ <item>
<id>106</id>
- <title>
- <![CDATA[ Online Poker - Different Types of Online Poker
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/online-poker
]]>
</url>
</item>
+ <item>
<id>109</id>
- <title>
- <![CDATA[ Online Poker - Opening an Account at an Online Poker Site
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/online-poker-opening-an-account
]]>
</url>
</item>
+ <item>
<id>111</id>
- <title>
- <![CDATA[ Beginners' Poker - Poker Glossary
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/beginners-poker-glossary
]]>
</url>
</item>
+ <item>
<id>117</id>
- <title>
- <![CDATA[ Poker Betting - What is a Blind?
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/poker-betting-what-is-a-blind
]]>
</url>
</item>
- <item>
<id>118</id>
- <title>
- <![CDATA[ Poker Betting - What is an Ante?
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/poker-betting-what-is-an-ante
]]>
</url>
</item>
+ <item>
<id>119</id>
- <title>
- <![CDATA[ Beginners Poker - What is Bluffing?
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/online-poker-what-is-bluffing
]]>
</url>
</item>
- <item>
<id>120</id>
- <title>
- <![CDATA[ Poker Games - What is Community Card Poker?
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/online-poker-what-is-community-card-poker
]]>
</url>
</item>
- <item>
<id>121</id>
- <title>
- <![CDATA[ Online Poker - What is Online Poker?
]]>
</title>
- <url>
- <![CDATA[ /Guides/Online-Poker-Guide/Beginners-Poker/online-poker-what-is-online-poker
]]>
</url>
</item>
</items>
</item>
</items>
</item>
</items>
</item>
</items>
XSL代码：
<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html" indent="yes"/>
<xsl:template name="loop">
<xsl:for-each select="items/item">
<ul>
<li><xsl:value-of select="@name" /></li>
<xsl:if test="@name and child::node()">
<ul>
<xsl:for-each select="items/item">
<li><xsl:value-of select="@name" />test</li>
</xsl:for-each>
</ul>
<xsl:call-template name="loop" />
</xsl:if>
<xsl:if test="child::node() and not(@name)">
<xsl:for-each select="/items">
<li><xsl:value-of select="id" /></li>
</xsl:for-each>
</xsl:if>
</ul>
</xsl:for-each>
<xsl:for-each select="item/items/item">
<li>hi</li>
</xsl:for-each>
</xsl:template>
<xsl:template match="/" name="test">
<xsl:call-template name="loop" />
</xsl:template>
</xsl:stylesheet>
我试图编写XSL，以便每个
<items>节点将呈现一个<ul>，而每个<items>节点将呈现一个<li>。XSL需要是递归的，因为我无法告诉嵌套节点的深度。
有人可以帮忙吗？
问候，
铝
最佳答案
这很简单。 XSLT处理器为您完成所有递归和循环，您所需要做的就是为要处理的节点指定模板。
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
>
<!-- <items> with <item> children becomes <ul> -->
<xsl:template match="items[item]">
<ul>
<xsl:apply-templates select="item" />
</ul>
</xsl:template>
<!-- <items> without <item> children is not handled -->
<xsl:template match="items[not(item)]" />
<!-- <item> with @name becomes <li> -->
<xsl:template match="item[@name]">
<li>
<xsl:value-of select ="@name" />
<xsl:apply-templates select="items" />
</li>
</xsl:template>
<!-- <item> without @name becomes <li>, too -->
<xsl:template match="item[not(@name)]">
<li>
<xsl:value-of select ="id" />
<xsl:apply-templates select="items" />
</li>
</xsl:template>
</xsl:stylesheet>
<xsl:apply-templates>始终是XSLT中的递归/迭代步骤。它采用适合其select表达式的所有节点并为其找到模板。您的工作是制作一个合适的
select表达式，为您要处理的每个节点提供一个模板，否则就避免了。 ;-)抵制将所有内容塞入一个大模板或使用<xsl:for-each>只是因为感觉很方便的冲动-事实并非如此。单独的模板可创建更多可重用和可维护的，嵌套程度较低的代码，并且XSLT处理器针对模板处理进行了优化，因此这甚至可能是更有效的方法。
关于xslt - XSLT模板和递归，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2835567/