public void getParameterList(RdsClient rdsClient) {
        RdsParameterListRequest request = new RdsParameterListRequest();
        request.setInstanceId("rds-7vh7cTlG");
        RdsParameterListResponse parameterList = rdsClient.getParameterList(request);
        print("getParameterList", parameterList);
    }

public void modifyParameter(RdsClient rdsClient) {
        RdsParameterListRequest parameterRequest = new RdsParameterListRequest();
        parameterRequest.setInstanceId("rds-7vh7cTlG");
        RdsParameterListResponse parameterList = rdsClient.getParameterList(parameterRequest);
        List<RdsParameter> parameters = parameterList.getParameters();
        RdsModifyParameter modifyParameter = null;
        String etag = null;
        if (CollectionUtils.isNotEmpty(parameters)) {
            for (RdsParameter rdsParameter : parameters) {
                if ("connect_timeout".equalsIgnoreCase(rdsParameter.getName())) {
                    modifyParameter = new RdsModifyParameter(rdsParameter.getName(), rdsParameter.getValue());
                    etag = rdsParameter.getEtag();
                    break;
                }
            }
        }
        if (modifyParameter == null || StringUtils.isEmpty(etag)) {
            throw new BceClientException("modifyParameter is null");
        }
        modifyParameter.setValue("10");
        RdsModifyParameterRequest request = new RdsModifyParameterRequest();
        request.setEtag(etag);
        request.setInstanceId(parameterRequest.getInstanceId());
        request.addParameters(modifyParameter);
        AbstractBceResponse response = rdsClient.modifyParameter(request);
        print("modifyParameter", response);
    }