📅  最后修改于: 2023-12-03 15:03:31.980000             🧑  作者: Mango
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.
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 CharacterRule
s, 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.
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.