App::import('Vendor', 'PHPExcel/Classes/PHPExcel');$objPHPExcel->getActiveSheetserving to IE 9, then the following may be needed$objWriter = PHPExcel_IO
$objPHPExcel = new PHPExcel();header('Content-Typeserving to IE 9, then the following may be needed$objWriter = PHPExcel_IOFactory但是,如果我对上述代码进行ajax</em