c# - 密码正则表达式验证

Question

这些是要求，但我想这对我的正则表达式技能来说太复杂了......

. 6 到 10 个字母数字字符
.允许 A-Z、a-z、0-9、@、$、_
.必须以字母开头
.必须包含至少一个数字
.不能包含两个连续的相同字符
.不能包含两个连续的相同数字

我知道正则表达式的基础，比如[A-Za-Z] = 仅限字符等...但是当涉及到连续字符和内容时...

Answer 1

试试这个

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

以上正则表达式说明:

(           # 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
  (?=.*[\W])        #   must contains at least one special character
              .     #     match anything with previous condition checking
                {6,20}  #        length at least 6 characters and maximum of 20 
)           # End of group

“/W”会增加密码可使用的字符范围，坑更安全。