foreach ($alias_name as $ca) {

             if ($sheet > 0) {

                 $objExcel->createSheet();  // 创建sheet

             }

             $objExcel->setActiveSheetIndex($sheet);

             $objExcel->getActiveSheet()->setTitle($result['alias_name'][$ca]);

             $objActSheet = $objExcel->getActiveSheet();

             $objActSheet->getDefaultRowDimension()->setRowHeight(30);

             $sheet++;

 }