使用的phpoffice进行表格的输出

安装：https://phpspreadsheet.readthedocs.io/en/latest/#installation

composer包安装地址：https://packagist.org/packages/phpoffice/phpspreadsheet

下面为使用方法：

   
      public function excel(Request $request)
        $behaviorDetail = 所查数据；
        $newExcel = new Spreadsheet();  //创建一个新的excel文档
        $objSheet = $newExcel->getActiveSheet();  //获取当前操作sheet的对象
        $objSheet->setTitle('');  //设置当前sheet的标题

        //设置宽度为true,不然太窄了
        $newExcel->getActiveSheet()->getColumnDimension('A')->setAutoSize(true);
        $newExcel->getActiveSheet()->getColumnDimension('B')->setAutoSize(true);
        $newExcel->getActiveSheet()->getColumnDimension('C')->setAutoSize(true);
        $newExcel->getActiveSheet()->getColumnDimension('D')->setAutoSize(true);
        
        $objSheet->setCellValue('A1', '列名')
            ->setCellValue('B1', '列名')
            ->setCellValue('C1', '列名')
            ->setCellValue('D1', '列名');

        foreach ($behaviorDetail as $k => $val) {
            $k = $k + 2;
            $objSheet->setCellValue('A' . $k, $val[''])
                ->setCellValue('B' . $k, $val[''])
                ->setCellValue('C' . $k, $val[''])；
        }
        $this->downloadExcel($newExcel, '表名', 'Xls');
      }


      function downloadExcel($newExcel, $filename, $format)
      {
        // $format只能为 Xlsx 或 Xls
        if ($format == 'Xlsx') {
            header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        } elseif ($format == 'Xls') {
            header('Content-Type: application/vnd.ms-excel');
        }
        header('Content-Disposition: attachment;filename="'
            . $filename . date('Y-m-d', strtotime('-1 day')) . '.' . strtolower($format).'"');
        header('Cache-Control: max-age=0');
        $objWriter = IOFactory::createWriter($newExcel, $format);
        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
        $objWriter->save('php://output');

        exit;
    }