📜  Passay-LengthComplexityRule(1)

📅  最后修改于: 2023-12-03 15:03:31.980000             🧑  作者: Mango

Passay-LengthComplexityRule

The Passay-LengthComplexityRule is a rule for the Passay password validation library. This rule ensures that the password meets a minimum length criteria, as well as a complexity criteria, which requires a password to have a mix of uppercase and lowercase letters, numbers, and other characters.

Usage

The Passay-LengthComplexityRule can be used by adding it to a PasswordValidationRuleset. Here is an example of creating a ruleset that requires a password to be at least 8 characters long and have at least one uppercase letter, one lowercase letter, and one number:

import org.passay.*;
import java.util.Arrays;
 
public class PasswordValidator {
    public static void main(String[] args) {
        PasswordValidator validator = new PasswordValidator(new PasswordValidationRuleset(
                Arrays.asList(
                        new LengthComplexityRule(8, new CharacterRule(EnglishCharacterData.UpperCase, 1),
                            new CharacterRule(EnglishCharacterData.LowerCase, 1),
                            new CharacterRule(EnglishCharacterData.Digit, 1))
                )
        ));
 
        RuleResult result = validator.validate(new PasswordData("Password1"));
        if (result.isValid()) {
            System.out.println("Password valid");
        } else {
            System.out.println("Invalid password");
            for (String msg : validator.getMessages(result)) {
                System.out.println(msg);
            }
        }
    }
}

In this example, the LengthComplexityRule is created with a minimum length of 8 characters and three CharacterRules, which specify that the password must have at least one uppercase letter, one lowercase letter, and one number.

When the validate() method is called with a PasswordData object containing the password to validate, a RuleResult object is returned. If the isValid() method of the RuleResult object returns true, the password is considered valid. Otherwise, the getMessages() method of the Validator object can be used to obtain a list of error messages detailing why the password failed validation.

Conclusion

The Passay-LengthComplexityRule is a powerful tool for enforcing password complexity requirements. By adding it to a Passay PasswordValidationRuleset, you can ensure that passwords meet length and complexity criteria.