如何使用XPath仅从字符串中获取数字 [英] How to get only numbers from string with XPath

问题描述

我有一个包含数字的字符串.仅使用 XPath 是否可行，我只能从中获取数字?

I have a string which contains numbers. Is it feasible only with XPath that I get only numbers from it?

例如:myString="abcd12ef34gh567"，结果:1234567

For example: myString="abcd12ef34gh567", result: 1234567

推荐答案

使用:

translate(., translate(.,'0123456789',''), '')

这就是所谓的双重翻译"方法，首先由@Michael Kay 提出，可以在 XPath 1.0 和 XPath 2.0 中使用.

This is the so called "double-translate" method, first proposed by @Michael Kay and can be used both in XPath 1.0 and in XPath 2.0.

当然，在 XPath 2.0 中使用 RegeX 通常会更高效:

replace('abc123def590xyz', '[^\d]', '')

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