3个字符或更多，最少1个减，最多3个数字的正则表达式

Question

I need the following regular expression: 我需要以下正则表达式：

Must have 3 alphabetic caracters or more. 必须具有3个或更多字母字符。
Must have one lower case or more 必须有一个或多个小写字母
Can have 0 to 3 numbers (max 3) 0-9 (123 for example is 3 numbers) 可以有0到3个数字（最多3个） 0-9 （例如123是3个数字）
Must have exactly one ú (One ú exactly) 必须只有一个ú （一ú准确）
Must finish with one of the following characters : # } . 必须以下列字符之一结尾： # } .
Must have min 9 chars, max 12 必须最少9个字符，最多12个字符

I try the following regular expression: 我尝试以下正则表达式：

/^(?=.*[A-Za-z]{3,})(?=.*[a-z]{1,})(?=.*[0-9]\d{0,3})(u{1})[A-Za-z0-9\d]{9,12}$/

One example valid: aA2ca13ú} 一个有效的示例： aA2ca13ú}

Answer 1

You can use this regex that should meet your requirements, 您可以使用符合您要求的正则表达式，

^(?=[^A-Za-z]*(?:[A-Za-z]+[^A-Za-z]*){3,})(?=\D*\d?\D*\d?\D*\d?\D*$)(?=[^ú]*ú[^ú]*$)[úa-zA-Z\d-]{8,11}[#}.]$

Demo 演示版

Let me know if any of your case fails. 让我知道您的任何案件是否失败。