如何将国际字母表（英语a-z，+非英语）与正则表达式相匹配？

Question

我想只允许输入英文字母和德国字母表中的数据。

喜欢öäü或法国像áê或中国人喜欢......

如何配置我的正则表达式，使其接受国际字母表中的所有字母字符？

Answer 1

由于您特别要求使用Unicode，\p{L}是Unicode字母的快捷方式。但是，并非所有正则表达式都支持这种语法。例如，.NET，Perl，Java和JGSoft正则表达式引擎，Python不会。

因此，例如\b\p{L}+\b将匹配Unicode字符的整个单词。

Answer 2

使用PCRE，它将是\w，一个“字”字符。如果配置正确，它也接受Unicode。

Answer 3

它有所不同。有些语言有一个“Unicode”标志，可以扩展\d，\w等。有些语言支持范围内的等价类，例如： [[=e=]]匹配e，é，ê等。您的语言或库的正则表达式文档将说明可用的选项。

Answer 4

在很多语言中，您只需在字符类中输入unicode符号：[a-zäöüß]等。

Answer 5

这里是正则表达式，可以使用 Unicode属性转义符来匹配国际单词系统中的所有字母：

对 Unicode属性转义符的检查语言支持，在较旧的版本中可能不可用，尤其是Web浏览器（JavaScript）

测试字符串

!"£$%^&*()_+[]{}'#;@~,./<?>¬``
0123465789
àáâasdäæãåāăąçćčđďèéêëēėęěğǵḧîïíīįìłḿñńǹňôöòóœøōõőṕŕřßśšdsşșťțûüùúūǘůűųẃẍÿýžźż
山人口刀木日月女子馬鳥目水
私金魚煙草莨東京
わたしきんぎょたばことうきょう
ワタシキンギョタバコトウキョウ
קרשתאבגדהוזחטיכ
abcdefghijklmonpqrstuvwxyz
ABCDEFGHIJKLMNOPQRSTUVWXYZ
©▓±■╣║¢¥

PCRE（PHP）/ GoLang -https://regex101.com/r/iRTxw4/2

仅字母匹配：\p{L}+

仅匹配号：\p{N}+

匹配字母和数字：\p{N}+|\p{L}+

不匹配字母和数字：[^\p{L}\p{N}]

ECMAScript（JavaScript）

还是要弄清楚这一点...

Answer 6

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我对正则表达式一无所知，但是我发现了这一点，它在React-Native中帮助了我