RegEx验证密码（1小写，1Uppercase，1位数，NoSpaces） [英] RegEx to Validate Password (1 Lowercase, 1Uppercase, 1 Digit, NoSpaces)
问题描述
我试图创建符合以下条件的RegExpression：
I'm trying to create a RegExpression to meet the criteria below;
- 至少1小写
- 至少1个大写
- 至少1个数字
- 无空格
- 没有特殊字符
- at least 1 Lowercase
- at least 1 Uppercase
- at least 1 Digit
- No Spaces
- Minimum 8 characters
- No special characters
到目前为止，我有这个;
So far I got this;
^(?=.{8,})(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.\s).*$
上班。
任何帮助将非常感谢。
我从来不善于谜题：）
However I can not get it to work. Any help would be greatly appreciated. I was never good at puzzles :)
推荐答案
它只是忽略了你的无空格/特殊字符规则的结尾处的。* ，而（？=。\s） / code> lookahead是错误的（你可能意味着（？！。* \s）或（？= \S * $ ））。
You're nearly there; it's just the .* at the end that ignores your "no spaces/special characters" rules, and the (?=.\s) lookahead is wrong (you probably meant (?!.*\s) or (?=\S*$)).
但是你不需要那么先行，因为你可以简单地指定允许哪些字符（并且强制执行8个字符最小规则）：
But you don't need that lookahead anyway because you can simply specify which characters are allowed (and enforce the "8 characters minimum" rule there, too):
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[A-Za-z\d]{8,}$
保持用户在其密码中不使用非字母数字字符？
But why do you want to keep users from using non-alphanumeric characters in their passwords?
这篇关于RegEx验证密码（1小写，1Uppercase，1位数，NoSpaces）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
