Unicode数字的字符类 [英] Character class for Unicode digits

问题描述

我需要创建一个 Pattern ，它将匹配所有Unicode数字和字母字符。到目前为止，我有\\\\ {IsAlphabetic} | [0-9]。

I need to create a Pattern that will match all Unicode digits and alphabetic characters. So far I have "\\p{IsAlphabetic}|[0-9]".

第一部分对我来说效果很好，它在将非拉丁字符识别为字母字符方面做得很好。问题是下半场。显然它只适用于阿拉伯数字。字符类 \\\\ 和 \p {Digit} 也只是 [0-9] 。 Pattern 的javadoc似乎没有提到Unicode数字的字符类。有没有人有这个问题的好解决方案？

The first part is working well for me, it's doing a good job of identifying non-Latin characters as alphabetic characters. The problem is the second half. Obviously it will only work for Arabic Numerals. The character classes \\d and \p{Digit} are also just [0-9]. The javadoc for Pattern does not seem to mention a character class for Unicode digits. Does anyone have a good solution for this problem?

为了我的目的，我会接受一种方法来匹配字符的所有字符集.isDigit 返回 true 。

For my purposes, I would accept a way to match the set of all characters for which Character.isDigit returns true.

推荐答案

引用 Java docs 约 isDigit ：

如果字符是一般类别类型，则字符是数字，由getType（codePoint）提供，是DECIMAL_DIGIT_NUMBER。

A character is a digit if its general category type, provided by getType(codePoint), is DECIMAL_DIGIT_NUMBER.

所以，我认为匹配数字的模式应该是 \p {Nd} 。

So, I believe the pattern to match digits should be \p{Nd}.

这是ideone上的工作示例。如您所见， Pattern.matches 和 Character.isDigit 之间的结果是一致的。

Here's a working example at ideone. As you can see, the results are consistent between Pattern.matches and Character.isDigit.

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