XPath 匹配空格分隔的属性值?

本文介绍了XPath 匹配空格分隔的属性值?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个 XML:

<entities>
  <entity attribute="attribute-value-1 attribute-value-2">value1</entity>
  <entity attribute="attribute-value-5 attribute-value-7 attribute-value-8">value2</entity>
</entities>

如何使用 XPath 选择属性值为 "attribute-value-7" 的实体?

How can I a select using XPath an entity with attribute value of "attribute-value-7"?

推荐答案

你必须小心避免无意中匹配了超字符串，例如attribute-value-77"或wrong-attribute-value-7".

You have to be careful to avoid inadvertently matching superstrings such as "attribute-value-77" or "wrong-attribute-value-7".

使用常用的成语来匹配 HTML @class 属性:

Use the idiom commonly used to match HTML @class attributes:

//entity[contains(concat(' ', normalize-space(@attribute), ' '),
                           ' attribute-value-7 ')]

XPath 2.0

//entity[tokenize(@attribute,'\s+')='attribute-value-7']

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