PHPExcel导出数据到excel

    public function excel() {    
        
        $data = $this->getExamInfo();    
        
        // 所教学科id    
        $subject = D('Exam')->getTeacherInfo($this->authInfo);    
        $list = M('Score')->where(array('acp_id' => intval($_GET['id'])))->order('sc_rank ASC')->select();    
        $auth = getDataByArray('Auth', $list, 'a_id', 'a_id,a_nickname');    
        
        foreach ($list as &$value) {    
            $value['a_nickname'] = $auth[$value['a_id']]['a_nickname'];    
        }    
        
        import('@.ORG.PHPExcel.PHPExcel');    
        
        // Create new PHPExcel object      
        $objPHPExcel = new PHPExcel();    
        // Set properties      
        $objPHPExcel->getProperties()->setCreator("ctos")    
                ->setLastModifiedBy("ctos")    
                ->setTitle("Office 2007 XLSX Test Document")    
                ->setSubject("Office 2007 XLSX Test Document")    
                ->setDescription("Test document for Office 2007 XLSX, generated using PHP classes.")    
                ->setKeywords("office 2007 openxml php")    
                ->setCategory("Test result file");    
        
        // set width      
        $objPHPExcel->getActiveSheet()->getColumnDimension('A')->setWidth(20);    
        $objPHPExcel->getActiveSheet()->getColumnDimension('B')->setWidth(20);    
        $objPHPExcel->getActiveSheet()->getColumnDimension('C')->setWidth(20);    
        $objPHPExcel->getActiveSheet()->getColumnDimension('D')->setWidth(20);    
        
        // 设置行高度      
        $objPHPExcel->getActiveSheet()->getRowDimension('1')->setRowHeight(22);    
        
        $objPHPExcel->getActiveSheet()->getRowDimension('2')->setRowHeight(20);    
        
        // 字体和样式    
        $objPHPExcel->getActiveSheet()->getDefaultStyle()->getFont()->setSize(10);    
        $objPHPExcel->getActiveSheet()->getStyle('A2:D2')->getFont()->setBold(true);    
        $objPHPExcel->getActiveSheet()->getStyle('A1')->getFont()->setBold(true);    
        
        $objPHPExcel->getActiveSheet()->getStyle('A2:D2')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);    
        $objPHPExcel->getActiveSheet()->getStyle('A2:D2')->getBorders()->getAllBorders()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN);    
        
        // 设置水平居中      
        $objPHPExcel->getActiveSheet()->getStyle('A1')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);    
        $objPHPExcel->getActiveSheet()->getStyle('A')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);    
        $objPHPExcel->getActiveSheet()->getStyle('B')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);    
        $objPHPExcel->getActiveSheet()->getStyle('C')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);    
        $objPHPExcel->getActiveSheet()->getStyle('D')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);    
        
        //  合并    
        $objPHPExcel->getActiveSheet()->mergeCells('A1:D1');    
        
        // 表头    
        $objPHPExcel->setActiveSheetIndex(0)    
                ->setCellValue('A1', $data['examTitle'])    
                ->setCellValue('A2', '序号')    
                ->setCellValue('B2', '姓名')    
                ->setCellValue('C2', '班级')    
                ->setCellValue('D2', '成绩');    
        
        // 内容    
        for ($i = 0, $len = count($list); $i < $len; $i++) {    
            $objPHPExcel->getActiveSheet(0)->setCellValue('A' . ($i + 3), $list[$i]['sc_rank']);    
            $objPHPExcel->getActiveSheet(0)->setCellValue('B' . ($i + 3), $list[$i]['a_nickname']);    
            $objPHPExcel->getActiveSheet(0)->setCellValue('C' . ($i + 3), $data['title']);    
            $objPHPExcel->getActiveSheet(0)->setCellValue('D' . ($i + 3), $list[$i]['sc_point']);    
            $objPHPExcel->getActiveSheet()->getStyle('A' . ($i + 3) . ':D' . ($i + 3))->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);    
            $objPHPExcel->getActiveSheet()->getStyle('A' . ($i + 3) . ':D' . ($i + 3))->getBorders()->getAllBorders()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN);    
            $objPHPExcel->getActiveSheet()->getRowDimension($i + 3)->setRowHeight(16);    
        }    
        
        // Rename sheet      
        $objPHPExcel->getActiveSheet()->setTitle($data['examTitle']);    
        
        // Set active sheet index to the first sheet, so Excel opens this as the first sheet      
        $objPHPExcel->setActiveSheetIndex(0);    
        
        // 输出    
        header('Content-Type: application/vnd.ms-excel');    
        header('Content-Disposition: attachment;filename="' . $data['examTitle'] . '.xls"');    
        header('Cache-Control: max-age=0');    
        
        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');    
        $objWriter->save('php://output');    
    }