CodeIgniterCodeigniter+PHPExcel导出数据到Excel文件

解压压缩包里的Classes文件夹中的内容到application\libraries\目录下，目录结构如下：
--application\libraries\PHPExcel.php
--application\libraries\PHPExcel(文件夹)
修改application\libraries\PHPExcel\IOFactory.php文件
--将其类名从PHPExcel_IOFactory改为IOFactory，遵从CI类命名规则。
--将其构造函数改为public

        $this->load->library('PHPExcel');
        $this->load->library('PHPExcel/IOFactory');
        $resultPHPExcel = new PHPExcel();
        $resultPHPExcel->getActiveSheet()->setCellValue('A1', '项目'); 
        $resultPHPExcel->getActiveSheet()->setCellValue('B1', '结果'); 
        $resultPHPExcel->getActiveSheet()->setCellValue('C1', '数量'); 
        $i = 2; 
        foreach($m_data['jc_fia'] as $key){ 
            $resultPHPExcel->getActiveSheet()->setCellValue('A' . $i, $key[0]); 
            $resultPHPExcel->getActiveSheet()->setCellValue('B' . $i, $key[1]); 
            $resultPHPExcel->getActiveSheet()->setCellValue('C' . $i, $key[0]); 
            $i ++; 
        }
        $outputFileName = "123.xls";
        $xlsWriter = new PHPExcel_Writer_Excel5($resultPHPExcel); 
        header("Content-Type: application/force-download"); 
        header("Content-Type: application/octet-stream"); 
        header("Content-Type: application/download"); 
        header('Content-Disposition:inline;filename="'.$outputFileName.'"'); 
        header("Content-Transfer-Encoding: binary"); 
        header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); 
        header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); 
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 
        header("Pragma: no-cache"); 
        $xlsWriter->save( "php://output" );