buildadmin中header导出功能

 <!-- 自定义按钮请使用插槽，甚至公共搜索也可以使用具名插槽渲染，参见文档 -->
<TableHeader
      :buttons="['refresh', 'add', 'edit', 'delete', 'unfold', 'comSearch', 'quickSearch', 'columnDisplay']"
      :quick-search-placeholder="t('Quick search placeholder', { fields: t('treetable.quick Search Fields') })"
 >
<!-- 导出按钮 -->
<el-button v-blur class="table-header-operate" type="success" style="margin-left: 12px" @click="derive">
    <Icon color="#ffffff" name="el-icon-Download" />
     <span class="table-header-operate-text">{{ t('treetable.export') }}</span>
</TableHeader>

?绑定点击事件

/**
 * 导出点击方法
 */
const derive = () => {
    createAxios<any, AxiosPromise>(
        {
            url: '/admin/Treetable/export',
            method: 'get',
            responseType: 'blob',
        },
        { reductDataFormat: false }
    ).then((response) => {
        const disposition = response.headers['content-disposition']
        const arr = disposition.split('filename=')
        const fileName = decodeURI(arr[1])
        fileDownload(response.data, fileName)
    })
}

参数说明：

xhr.response的数据类型

responseType值	xhr.response 数据类型	说明
""	String字符串	默认值(在不设置responseType时)
"text"	String字符串
"document"	Document对象	希望返回 XML 格式数据时使用
"json"	javascript对象	存在兼容性问题，IE10/IE11不支持
"blob"	Blob对象
"arrayBuffer"	ArrayBuffer对象

?编写控制器中导出方法

/**
     * 导出
     * @return void
     * @throws Throwable
     */
    public function export(): void
    {
        $list = $this->model->select()->toArray();

        $spreadsheet = new Spreadsheet();
        $sheet       = $spreadsheet->getActiveSheet();
        $sheet->setCellValue([1, 1], '名称');
        $sheet->setCellValue([2, 1], 'ID');
        $sheet->setCellValue([3, 1], '创建时间');

        $h = 2;
        foreach ($list as $v) {
            $sheet->setCellValue([1, $h], $v['name']);
            $sheet->setCellValue([2, $h], $v['id']);
            $sheet->setCellValue([3, $h], date('Y-m-d H:i:s', $v['create_time']));
            $h++;
        }

        $writer = new Xlsx($spreadsheet);
        $file   = time() . '.xlsx';
        ob_end_clean();
        header('Content-Type: application/vnd.ms-excel');
        header('Access-Control-Expose-Headers:Content-Disposition');
        header('Content-Disposition: attachment;filename=' . $file);
        header('Cache-Control: max-age=0');
        $writer->save('php://output');
        $spreadsheet->disconnectWorksheets();
    }