if (isset($param['export_data']) && $param['export_data'] == 1) {
    $header = [[HEADER_LIST]];
    $body   = [];
    $data   = $model->select();
    foreach ($data as $item) {
        $record       = [];
        [BODY_ITEM]
        $body[]       = $record;
    }
    return $this->exportData($header, $body, '[FILE_NAME]-' . date('Y-m-d-H-i-s'));
}