Passay - LengthComplexityRule

LengthComplexityRule 根據密碼長度定義適用的規則。考慮以下策略。

• 如果密碼長度在 1 到 5 個字元之間，則僅允許小寫字母。

• 如果密碼長度在 6 到 8 個字元之間，則僅允許 a、b 和 c。

示例

以下示例演示了使用 Passay 庫針對上述策略驗證密碼。

import org.passay.AllowedCharacterRule;
import org.passay.CharacterRule;
import org.passay.EnglishCharacterData;
import org.passay.LengthComplexityRule;
import org.passay.PasswordData;
import org.passay.PasswordValidator;
import org.passay.RuleResult;

public class PassayExample {
   public static void main(String[] args) {
      LengthComplexityRule lengthComplexityRule = new LengthComplexityRule();
      //Rule: Password of 1 to 5 characters should contains lower case alphabets only
      lengthComplexityRule.addRules("[1,5]", 
         new CharacterRule(EnglishCharacterData.LowerCase, 5));
      //8 and 16 characters
      lengthComplexityRule.addRules("[6,8]", 
         new AllowedCharacterRule(new char[] { 'a', 'b', 'c' }));    
      PasswordValidator validator = new PasswordValidator(lengthComplexityRule);
      PasswordData password = new PasswordData("abcdef");
      RuleResult result = validator.validate(password);
      if(result.isValid()){
         System.out.println("Password validated.");
      }else{
         System.out.println("Invalid Password: " + validator.getMessages(result));            
      }
   }
}

輸出

Invalid Password: [
Password contains the illegal character 'd'., 
Password contains the illegal character 'e'., 
Password contains the illegal character 'f'., 
Password meets 0 complexity rules, but 1 are required.]