ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public Integer getPasswordMinLengthAsInteger() {
                return 8;
            }

            @Override
            public boolean isPasswordRequireUppercase() {
                return false;
            }

        return !split(getPasswordInvalidAdminPasswords(), "\n")
                .get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).anyMatch(s -> s.equals(password)));
    }

    Integer getPasswordMinLengthAsInteger();

    boolean isPasswordRequireUppercase();

    boolean isPasswordRequireLowercase();

    boolean isPasswordRequireDigit();

    boolean isPasswordRequireSpecialChar();

            return "errors.blank_password";
        }

        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        final Integer minLength = fessConfig.getPasswordMinLengthAsInteger();
        if (minLength != null && minLength > 0 && password.length() < minLength) {
            return "errors.password_length";
        }

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getPasswordMinLengthAsInteger();

    /**
     * Get the value for the key 'password.require.uppercase'. <br>
     * The value is, e.g. false <br>
     * comment: Require uppercase letters in password.