只在节点中直接选择文本，而不是在子节点中 [英] Only select text directly in node, not in child nodes

问题描述

如何在不选择子节点中的文本的情况下检索节点中的文本?

<div class="title">编辑说明</div><div class="changed">上次更新:</div><br class="clear">Lorem ipsum dolor 坐 amet.

换句话说，我想要Lorem ipsum dolor sat amet. 而不是编辑器描述最后更新:Lorem ipsum dolor sat amet.

解决方案

在提供的 XML 文档中:

<div class="title">编辑说明</div><div class="changed">上次更新:</div><br class="clear">Lorem ipsum dolor 坐 amet.

顶部元素 /div 有 4 个子节点，它们是文本节点.这四个 text-node 子节点中的前三个是 whitespace-only.这 4 个 text-node 子节点中的最后一个是需要的.

使用:

/div/text()[last()]

这与不同:

/div/text()

后者可能(取决于 whitespace-only 节点是否被 XML 解析器保留)选择所有 4 个文本节点，但您只需要它们中的最后一个.

另一种选择是(当您不确切知道您想要哪个 text-node 时):

/div/text()[normalize-space()]

这将选择 /div 的所有 text-node-children 不是 whitespace-only 文本节点.

How does one retrieve the text in a node without selecting the text in the children?

<div id="comment">
     <div class="title">Editor's Description</div>
     <div class="changed">Last updated: </div>
     <br class="clear">
     Lorem ipsum dolor sit amet.
</div>

In other words, I want Lorem ipsum dolor sit amet. rather than Editor's DescriptionLast updated: Lorem ipsum dolor sit amet.

解决方案

In the provided XML document:

<div id="comment">
      <div class="title">Editor's Description</div>
      <div class="changed">Last updated: </div>
      <br class="clear">
      Lorem ipsum dolor sit amet. 
</div> 

the top element /div has 4 children nodes that are text nodes. The first three of these four text-node children are whitespace-only. The last of these 4 text-node children is the one that is wanted.

Use:

/div/text()[last()]

This is different from:

/div/text()

The latter may (depending on whether whitespace-only nodes are preserved by the XML parser) select all 4 text nodes, but you only want the last of them.

An alternative is (when you don't know exactly which text-node you want):

/div/text()[normalize-space()]

This selects all text-node-children of /div that are not whitespace-only text nodes.

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