I want a regular expression to check that: 我想要一个正则表达式来检查：

A password contains at least eight characters, including at least one number and includes both lower and uppercase letters and special characters, for example # , ? 密码至少包含八个字符，包括至少一个数字，并且同时包含大小写字母和特殊字符，例如# ? , ! ， ! . 。

It cannot be your old password or contain your username, "password" , or "websitename" 它不能是您的旧密码或包含用户名， "password"或"websitename"

And here is my validation expression which is for eight characters including one uppercase letter, one lowercase letter, and one number or special character. 这是我的验证表达式，它包含八个字符，包括一个大写字母，一个小写字母和一个数字或特殊字符。

(?=^.{8,}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$"

How can I write it for a password must be eight characters including one uppercase letter, one special character and alphanumeric characters ? 如何编写密码，密码必须是八个字符，包括一个大写字母，一个特殊字符和字母数字字符 ？

^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[#?!@$%^&*-]).{8,}$

This regex will enforce these rules: 此正则表达式将执行以下规则：

  • At least one upper case English letter , (?=.*?[AZ]) 至少一个大写英文字母 ， (?=.*?[AZ])
  • At least one lower case English letter, (?=.*?[az]) 至少一个小写英文字母(?=.*?[az])
  • At least one digit, (?=.*?[0-9]) 至少一位数字(?=.*?[0-9])
  • At least one special character, (?=.*?[#?!@$%^&*-]) 至少一个特殊字符(?=.*?[#?!@$%^&*-])
  • Minimum eight in length .{8,} (with the anchors) 长度最少为八位.{8,} （带锚点）

#3楼

Just a small improvement for @anubhava's answer: Since special character are limited to the ones in the keyboard, use this for any special character: @anubhava的答案仅作一个小改进：由于特殊字符仅限于键盘上的字符，因此可将其用于任何特殊字符：

^(?=.*?[AZ])(?=(.*[az]){1,})(?=(.*[\\d]){1,})(?=(.*[\\W]){1,})(?!.*\\s).{8,}$

This regex will enforce these rules: 此正则表达式将执行以下规则：

  • At least one upper case English letter 至少一个大写英文字母
  • At least one lower case English letter 至少一个小写英文字母
  • At least one digit 至少一位数字
  • At least one special character 至少一个特殊字符
  • Minimum eight in length 长度最少八位

#4楼

Minimum eight characters, at least one letter and one number: 至少八个字符，至少一个字母和一个数字：

"^(?=.*[A-Za-z])(?=.*\d)[A-Za-z\d]{8,}$"

Minimum eight characters, at least one letter, one number and one special character: 至少八个字符，至少一个字母，一个数字和一个特殊字符：

"^(?=.*[A-Za-z])(?=.*\d)(?=.*[@$!%*#?&])[A-Za-z\d@$!%*#?&]{8,}$"

Minimum eight characters, at least one uppercase letter, one lowercase letter and one number: 至少八个字符，至少一个大写字母，一个小写字母和一个数字：

"^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[a-zA-Z\d]{8,}$"

Minimum eight characters, at least one uppercase letter, one lowercase letter, one number and one special character: 至少八个字符，至少一个大写字母，一个小写字母，一个数字和一个特殊字符：

"^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$"

Minimum eight and maximum 10 characters, at least one uppercase letter, one lowercase letter, one number and one special character: 最少8个字符，最多10个字符，至少一个大写字母，一个小写字母，一个数字和一个特殊字符：

"^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,10}$"

#5楼

Import the JavaScript file jquery.validate.min.js . 导入JavaScript文件jquery.validate.min.js 。

You can use this method: 您可以使用以下方法：

$.validator.addMethod("pwcheck", function (value) {
    return /[\@\#\$\%\^\&\*\(\)\_\+\!]/.test(value) && /[a-z]/.test(value) && /[0-9]/.test(value) && /[A-Z]/.test(value)
});
  1. At least one upper case English letter 至少一个大写英文字母
  2. At least one lower case English letter 至少一个小写英文字母
  3. At least one digit 至少一位数字
  4. At least one special character 至少一个特殊字符

#6楼

I had some difficulty following the most popular answer for my circumstances. 对于我的情况，我在遵循最受欢迎的答案时遇到了一些困难。 For example, my validation was failing with characters such as ; 例如，我的验证失败，例如字符; or [ . 或[ 。 I was not interested in white-listing my special characters, so I instead leveraged [^\\w\\s] as a test - simply put - match non word characters (including numeric) and non white space characters. 我对将特殊字符列入白名单不感兴趣，因此我利用[^\\w\\s]作为测试-简而言之-匹配非单词字符（包括数字）和非空格字符。 To summarize, here is what worked for me... 总而言之，这是对我有用的...

  • at least 8 characters 至少8字符
  • at least 1 numeric character 至少1数字字符
  • at least 1 lowercase letter 至少1个小写字母
  • at least 1 uppercase letter 至少1大写字母
  • at least 1 special character 至少1特殊字符
/^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9])(?=.*?[^\w\s]).{8,}$/

JSFiddle Link - simple demo covering various cases JSFiddle Link-涵盖各种情况的简单演示