// 导出exl

    public function look_down(){

        $id = I('get.id');

        $m = M ('offer_goods');

        $where['offer_id'] = $id;

        $data = $m->field('goods_id,goods_sn,goods_name,barcode,goods_type,price')->select();

        // 导出Exl

        import("Org.Util.PHPExcel");

        import("Org.Util.PHPExcel.Worksheet.Drawing");

        import("Org.Util.PHPExcel.Writer.Excel2007");

        $objPHPExcel = new \PHPExcel();

        $objWriter = new \PHPExcel_Writer_Excel2007($objPHPExcel);

        $objActSheet = $objPHPExcel->getActiveSheet();

        // 水平居中（位置很重要，建议在最初始位置）

        $objPHPExcel->setActiveSheetIndex(0)->getStyle('A')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

        $objPHPExcel->setActiveSheetIndex(0)->getStyle('B1')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

        $objPHPExcel->setActiveSheetIndex(0)->getStyle('C')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

        $objPHPExcel->setActiveSheetIndex(0)->getStyle('D')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

        $objPHPExcel->setActiveSheetIndex(0)->getStyle('E')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

        $objPHPExcel->setActiveSheetIndex(0)->getStyle('F')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);

        $objActSheet->setCellValue('A1', '商品货号');

        $objActSheet->setCellValue('B1', '商品名称');

        $objActSheet->setCellValue('C1', '商品图');

        $objActSheet->setCellValue('D1', '商品条码');

        $objActSheet->setCellValue('E1', '商品属性');

        $objActSheet->setCellValue('F1', '报价(港币)');

        // 设置个表格宽度

        $objPHPExcel->getActiveSheet()->getColumnDimension('A')->setWidth(16);

        $objPHPExcel->getActiveSheet()->getColumnDimension('B')->setWidth(80);

        $objPHPExcel->getActiveSheet()->getColumnDimension('C')->setWidth(15);

        $objPHPExcel->getActiveSheet()->getColumnDimension('D')->setWidth(20);

        $objPHPExcel->getActiveSheet()->getColumnDimension('E')->setWidth(12);

        $objPHPExcel->getActiveSheet()->getColumnDimension('F')->setWidth(12);

        // 垂直居中

        $objPHPExcel->getActiveSheet()->getStyle('A')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);

        $objPHPExcel->getActiveSheet()->getStyle('B')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);

        $objPHPExcel->getActiveSheet()->getStyle('D')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);

        $objPHPExcel->getActiveSheet()->getStyle('E')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);

        $objPHPExcel->getActiveSheet()->getStyle('F')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);

        foreach($data as $k=>$v){

            $k +=2;

            $objActSheet->setCellValue('A'.$k, $v['goods_sn']);

            $objActSheet->setCellValue('B'.$k, $v['goods_name']);    

            $img = M('goods')->where('goods_id = '.$v['goods_id'])->field('goods_thumb')->find();

            // 图片生成

            $objDrawing[$k] = new \PHPExcel_Worksheet_Drawing();

            $objDrawing[$k]->setPath('./Upload/'.$img['goods_thumb']);

            // 设置宽度高度

            $objDrawing[$k]->setHeight(80);//照片高度

            $objDrawing[$k]->setWidth(80); //照片宽度

            /*设置图片要插入的单元格*/

            $objDrawing[$k]->setCoordinates('C'.$k);

            // 图片偏移距离

            $objDrawing[$k]->setOffsetX(12);

            $objDrawing[$k]->setOffsetY(12);

            $objDrawing[$k]->setWorksheet($objPHPExcel->getActiveSheet());

            // 表格内容

            $objActSheet->setCellValue('D'.$k, $v['barcode']);

            $objActSheet->setCellValue('E'.$k, $v['goods_type']);

            $objActSheet->setCellValue('F'.$k, $v['price']);

            // 表格高度

            $objActSheet->getRowDimension($k)->setRowHeight(80);

        }

        $fileName = '报价表';

        $date = date("Y-m-d",time());

        $fileName .= "_{$date}.xls";

        $fileName = iconv("utf-8", "gb2312", $fileName);

        //重命名表

        // $objPHPExcel->getActiveSheet()->setTitle('test');

        //设置活动单指数到第一个表,所以Excel打开这是第一个表

        $objPHPExcel->setActiveSheetIndex(0);

        header('Content-Type: application/vnd.ms-excel');

        header("Content-Disposition: attachment;filename=\"$fileName\"");

        header('Cache-Control: max-age=0');

        $objWriter = \PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');

        $objWriter->save('php://output'); //文件通过浏览器下载

        // END

    }