fessConfig.setUserInfo(isCheckboxEnabled(form.userInfo));
        fessConfig.setUserFavorite(isCheckboxEnabled(form.userFavorite));
        fessConfig.setWebApiJson(isCheckboxEnabled(form.webApiJson));
        fessConfig.setAppValue(form.appValue);
        fessConfig.setDefaultLabelValue(form.defaultLabelValue);
        fessConfig.setDefaultSortValue(form.defaultSortValue);
        fessConfig.setVirtualHostValue(form.virtualHostValue);

                return e.getValue().stream();
            }
            return Stream.empty();
        }).filter(StringUtil::isNotBlank).toArray(n -> new String[n]);
    }

    default void setAppValue(final String value) {
        setSystemProperty(Constants.APP_VALUE_PROPERTY, value);
        propMap.remove(APP_VALUES);
    }

    default String getAppValue() {