正则表达式以验证具有字符限制的密码 [英] Regex to validate passwords with characters restrictions

问题描述

我需要使用以下规则来验证密码:

I need to validate a password with these rules:

• 6到20个字符
• 必须至少包含一个数字；
• 必须至少包含一个字母(不区分大小写)；
• 可以包含以下字符:！ @#$％& *

以下表达式匹配除最后一个条件以外的所有条件.最后一个我该怎么办?

The following expression matches all but the last requirement. What can I do with the last one?

((?=.*\d)(?=.*[A-z]).{6,20})

推荐答案

我不确定我是否拥有此权利，但是由于您的最后一个要求是" 可以 包含以下字符:！@#$％& *我假设不允许使用其他特殊字符.换句话说，只能使用字母，数字和特殊字符！@#$％& *.

I'm not completely sure I have this right, but since your last requirement is "Can contain the following characters: !@#$%&*" I am assuming that other special characters are not allowed. In other words, the only allowed characters are letters, digits, and the special characters !@#$%&*.

如果这是正确的解释，则以下正则表达式应该起作用:

If this is the correct interpretation, the following regex should work:

^((?=.*\d)(?=.*[a-zA-Z])[a-zA-Z0-9!@#$%&*]{6,20})$

请注意，我将字符类[A-z]更改为[a-zA-Z]，因为[A-z]还将包含以下字符:[\] ^ _`

Note that I changed your character class [A-z] to [a-zA-Z], because [A-z] will also include the following characters: [\]^_`

我还添加了字符串锚点的开头和结尾，以确保您不会部分匹配.

I also added beginning and end of string anchors to make sure you don't get a partial match.

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