正则表达式仅匹配字母 [英] Regex to match only letters

问题描述

如何编写仅与字母匹配的正则表达式?

How can I write a regex that matches only letters?

推荐答案

使用字符集:[a-zA-Z]匹配字母A-Z中的小写字母和大写字母. [a-zA-Z]+匹配一个或多个字母，^[a-zA-Z]+$仅匹配仅包含一个或多个字母的字符串(^和$分别标记字符串的开头和结尾).

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).

如果要匹配A–Z以外的其他字母，则可以将它们添加到字符集:[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}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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