正则表达式用于密码验证

Question

任何人都可以帮我创建密码验证的正则表达式.

条件是"密码必须包含8个字符和至少一个数字,一个字母和一个唯一字符,如 !#$%&? "

Answer 1

^.*(?=.{8,})(?=.*[a-zA-Z])(?=.*\d)(?=.*[!#$%&? "]).*$

---

^.*              : Start
(?=.{8,})        : Length
(?=.*[a-zA-Z])   : Letters
(?=.*\d)         : Digits
(?=.*[!#$%&? "]) : Special characters
.*$              : End

Answer 2

试试这个

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

上述正则表达式的描述:

(           # Start of group
  (?=.*\d)      #   must contains one digit from 0-9
  (?=.*[a-z])       #   must contains one lowercase characters
  (?=.*[\W])        #   must contains at least one special character
              .     #     match anything with previous condition checking
                {8,20}  #        length at least 8 characters and maximum of 20 
)           # End of group

"/ W"将增加可用于密码和坑的字符范围可以更安全.

Answer 3

您可以轻松地完成每个要求(例如,最少8个字符:.{8,}将匹配8个或更多字符).

要组合它们,您可以使用"正向前瞻"将多个子表达式应用于相同的内容.类似于(?=.*\d.*).{8,}将一个(或多个)数字与前瞻和8个或更多字符匹配的东西.

所以:

(?=.*\d.*)(?=.*[a-zA-Z].*)(?=.*[!#\$%&\?].*).{8,}

记住逃避元字符.

Answer 4

密码具有以下条件:

1. 至少1位数
2. 至少2个特殊字符
3. 至少1个字母字符

4. 没有空白

   'use strict';
   (function() {
       var foo = '3g^g$';
   
       console.log(/^(?=.*\d)(?=(.*\W){2})(?=.*[a-zA-Z])(?!.*\s).{1,15}$/.test(foo));
   
       /**
        * (?=.*\d)         should contain at least 1 digit
        * (?=(.*\W){2})    should contain at least 2 special characters
        * (?=.*[a-zA-Z])   should contain at least 1 alphabetic character
        * (?!.*\s)         should not contain any blank space
        */
   })();