密碼複雜度的正則表達式

Question

我試圖通過客戶端（JavaScript）和服務器端（ASP.NET C＃）上的正則表達式來實現密碼複雜度的強制實施。

的規則如下：

• 必須是8-40個字符
• 必須至少包含一個數字
• 必須包含至少一個小寫字母
• 必須包含至少一個大寫字母
• 必須包含至少一個特殊字符

您可以幫助構建驗證上述所需的正則表達式嗎？

Answer 1

這裏試試這個正則表達式：

((?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%]).{8,40}) 

(   # Start of group 
    (?=.*\d)  # must contains one digit from 0-9 
    (?=.*[a-z])  # must contains one lowercase characters 
    (?=.*[A-Z])  # must contains one uppercase characters 
    (?=.*[@#$%])  # must contains one special symbols in the list "@#$%" 
       .  #  match anything with previous condition checking 
       {8,40} #  length at least 8 characters and maximum of 40 
)