/**
     * @param array $data 数据
     * @param array $title 表头
     * @return bool
     * @throws \PhpOffice\PhpSpreadsheet\Writer\Exception 下载文件
     */
    public function _export($data,$title){
        //数据
        /*$data = [
            ['title1' => '111', 'title2' => '222'],
            ['title1' => '111', 'title2' => '222']
        ];
        //表头
        $title = ['第一行标题', '第二行标题'];*/
 
        $spreadsheet = new Spreadsheet();
        $sheet = $spreadsheet->getActiveSheet();
 
        //表头
        //设置单元格内容
        $titCol = 'A';
        foreach ($title as $key => $value) {
            // 单元格内容写入
            $sheet->setCellValue($titCol . '1', $value);
            $titCol++;
        }
        $row = 2; // 从第二行开始
        foreach ($data as $item) {
            $dataCol = 'A';
            foreach ($item as $value) {
                // 单元格内容写入
                $sheet->setCellValue($dataCol . $row, $value);
                $dataCol++;
            }
            $row++;
        }
 
        ob_end_clean();//清除缓冲区,避免乱码
        ob_start();
        // 将输出重定向到客户端的网络浏览器（Xlsx）
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Cache-Control: max-age=0');
        // 如果您要使用IE 9，则可能需要执行以下操作
        header('Cache-Control: max-age=1');
 
        // 如果您通过SSL向IE提供服务，则可能需要执行以下操作
        header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
        header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT'); // always modified
        header('Cache-Control: cache, must-revalidate'); // HTTP/1.1
        header('Pragma: public'); // HTTP/1.0
 
        header('Content-type:application/vnd.ms-excel;charset=utf-8;name="'.date('YmdHis').'.xlsx"');
        header("Content-Disposition:attachment;filename=".date('YmdHis').".xlsx");//attachment新窗口打印 inline本窗口打印
 
        $writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
        $writer->save('php://output');
 
        /* 释放内存 */
        $spreadsheet->disconnectWorksheets();
        unset($spreadsheet);
        ob_end_flush();
        return true;
    }