正则表达式没有验证

Question

I have the following regex for password validation in javascript:

^[!#\$%\(\)\*,\-\./:;=\?@\[\\\]\^_`\{\|\}~a-zA-Z0-9]*$

   <script type="text/javascript">
        var regex = "^[!#\$%\(\)\*,\-\./:;=\?@\[\\\]\^_`\{\|\}~a-zA-Z0-9]*$";
        var value = 'test';
        if (value.match(regex) == false) {
            alert('password invalid');
        }
    </script>

The regex rules are:

• 12-25 characters
• at least one upper case letter
• at least one lower case letter
• at least one numeric digit
• at least one of the special characters: !#$%()*,-./:;=?@[]^_`{|}~

However, the regex doesn't seem to work. It matches any characters. How do I fix this?

Answer 1

Using positive lookahead your regex can be validated in one single match call. Use this regex:

 var regex =
     /(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[!#$%()\*,/:;=?@\[\\\]\^_`{}|.-])^.{12,25}$/;
 var value = 'aaaAaaaaa?test2';
 if (!value.match(regex))
     document.writeln('invalid');
 else
     document.writeln('valid');

See this code live in action

Answer 2

尝试：

/^(?=(?:.*[a-z]){1})(?=(?:.*[A-Z]){1})(?=(?:.*\d){1})(?=(?:.*[!#$%()*,-./:;=?@[]^_`{|}~ ]){1,}).{12,25}$/

Answer 3

This regex works:

^(?=.*[A-Z])(?=.*[a-z])(?=.*\d)(?=.*[-|^!#$%()*,./:;=?@_`{}~[\]]).{12,25}$

It uses the technique of lookahead to make sure there is at least 1 digit, lowercase char, ...

Also, look at Regex expression for password rules for a similar challenge