excel导出图片

        /**
     * 导出图片到excel
     */
    public function picexporttest() {
        $objPHPExcel = $this->app->loadClass('phpexcel');
        // Set document properties  
        $objPHPExcel->getProperties()->setCreator("Maarten Balliauw")
                ->setLastModifiedBy("Maarten Balliauw")
                ->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");

        $temp = chr(intval(ord("A")) + 0) . 1;
        //1.图片填充列  
        /* 实例化插入图片类 */
        $objDrawing = new PHPExcel_Worksheet_Drawing();
        /* 设置图片路径 切记：只能是本地图片 */
        $dir = $_SERVER['DOCUMENT_ROOT'];
        $objDrawing->setPath($dir."/friend.jpg");
        /* 设置图片高度 */
        $objDrawing->setHeight(10);
        $objDrawing->setWidth(10);
        /* 设置图片要插入的单元格 */
        $objDrawing->setCoordinates($temp);
        $objDrawing->setWorksheet($objPHPExcel->getActiveSheet());
        
                // 重命名 worksheet  
        $objPHPExcel->getActiveSheet()->setTitle("aaaa");  
  
        // Set active sheet index to the first sheet, so Excel opens this as the first sheet  
        $objPHPExcel->setActiveSheetIndex(0);  
  
        $filename = iconv("utf-8", "gb2312", $filename.date('Y-m-d'));  
  
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Content-Disposition: attachment;filename="'.$filename.'.xlsx"');  
        header('Cache-Control: max-age=0');  

  
               //注意这里 第二个参数写成 'Excel2007' 会避免特殊字符或中文乱码  
        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');  
        $objWriter->save('php://output');
  
        exit; 
    }