public function init()
{
Doo::loadClassAt('Category', 'default');
Doo::loadClassAt('City', 'default');
BookController::$dataTableUrl = adminAppUrl('operation/book/dataTable');
BookController::$addUrl = adminAppUrl('operation/book/add');
BookController::$modUrl = adminAppUrl('operation/book/mod?id=');
BookController::$delUrl = adminAppUrl('operation/book/del?id=');
BookController::$city = '<select class="m-wrap" name="city" id="city-element"><option value="0">' . L('全部城市') . '</option>' . City::cateToOption($this->getUrlVar('city'), 1) . '</select>';
}