正则表达式只匹配字母 [英] Regex to match only letters

问题描述

如何编写仅匹配字母的正则表达式?

How can I write a regex that matches only letters?

推荐答案

使用字符集:[a-zA-Z] 以小写和大写形式匹配 A–Z 中的一个字母.[a-zA-Z]+ 匹配一个或多个字母，^[a-zA-Z]+$ 只匹配仅由一个或多个字母组成的字符串(^ 和 $ 分别标记字符串的开始和结束).

Use a character set: [a-zA-Z] matches one letter from A–Z in lowercase and uppercase. [a-zA-Z]+ matches one or more letters and ^[a-zA-Z]+$ matches only strings that consist of one or more letters only (^ and $ mark the begin and end of a string respectively).

如果你想匹配除 A-Z 之外的其他字母，你可以将它们添加到字符集中:[a-zA-ZäöüßÄÖÜ].或者您使用预定义的字符类，例如 Unicode 字符属性 类 p{L} 描述作为字母的 Unicode 字符.

If you want to match other letters than A–Z, you can either add them to the character set: [a-zA-ZäöüßÄÖÜ]. Or you use predefined character classes like the Unicode character property class p{L} that describes the Unicode characters that are letters.

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