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帮帮我,我想以pdf格式保存excel代码:

include_once 'Classes/PHPExcel.php';
/** PHPExcel_IOFactory */
require_once ('Classes/PHPExcel/IOFactory.php');
include_once ('Classes/PHPExcel/Writer/Excel2007.php');
include_once ('Classes/PHPExcel/Writer/PDF.php');

include_once ('Classes/PHPExcel/Writer/PDF/DomPDF.php');


$rendererName = PHPExcel_Settings::PDF_RENDERER_DOMPDF;
//$rendererLibrary = 'tcPDF5.9';
//$rendererLibrary = 'mPDF5.4';
$rendererLibrary = 'domPDF0.6.0beta3';
$rendererLibraryPath = '/' . $rendererLibrary;
$objPHPExcel->getActiveSheet()->setTitle('Orari');
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'PDF');
$objWriter->setSheetIndex(0);
$objWriter->save('esp.pdf');

我想以pdf格式保存,但是当我尝试保存时,我有来自phpexcel的错误响应: 致命错误:未捕获异常'PHPExcel_Writer_Exception',并在C:\ xampp\htdocs\fserv \中显示消息'无法加载PDF呈现库' Classes\PHPExcel\Writer\PDF\DomPDF.php:34堆栈跟踪:#0 C:\ xampp\htdocs\fserv\esportatore.php(190):include_once()#1 C:\ xampp\htdocs\fserv\index. php(44):include('C:\ xampp\htdocs ...')在第34行的C:\ xampp\htdocs\fserv\Classes\PHPExcel\Writer\PDF\DomPDF.php中抛出#2 {main}