TP5 Excel export download convenient class library

$excel=new Excel();
$table_name="mk_material_list_edit";
$field=["id"=>"序号","guid"=>"项目代码","name"=>"项目名称"];
$map=["status"=>1];
$map2=["status"=>-1];
$excel->setExcelName("下载装修项目")
->createSheet("装修项目",$table_name,$field,$map)
->createSheet("已删除装修项目",$table_name,$field,$map2)
->downloadExcel();
//快速导入
$getExcelobject=Excel::loadExcel("test.xls");
$sheetName=$getExcelobject->getSheetNames();
dump($sheetName);
$sheet = $getExcelobject->getSheetByName($sheetName[0])->toArray();
dump($sheet);