正则表达式密码策略 [英] Regex for password policy

问题描述

我需要执行以下密码策略:

I need to enforce the following password policy :

至少9个字符，4个字符中的至少1个字符 字符类(字母的大小写；数字，符号).

at least 9 characters, with at least one character from each of the 4 character classes (alphabetic lower and upper case; numeric, symbols).

任何正则表达式专家都可以在这里提供帮助吗? (我正在使用Java regex引擎)

Any regex experts can help out here ? (I am using a Java regex engine)

在使用的同时，是否有任何在线工具可以为此类任务生成正则表达式?

While we're at it, is there any online tool that can generate a regex for these kind of tasks ?

谢谢！

推荐答案

(?=.{9,})(?=.*?[^\w\s])(?=.*?[0-9])(?=.*?[A-Z]).*?[a-z].*

请注意，此模式不包括特殊的utf字符，例如ö.我不会在一个正则表达式中做到这一点.如果您想验证它，我将其拆分并搜索每件事.

Note that this pattern doesn't include special utf chars like ö. I would not do this in one regex. I would split it and search for each thing, if you want to validate it.

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