vue-json-excel导出数字字符串转为科学计数法问题和文件格式问题

<downloadexcel
                class = "export-btn"
                :fetch = "fetchData"
                :fields = "json_fields"
                :before-generate = "startDownload"
                :before-finish = "finishDownload"
                :name = filename>
                <a-button size="large" type="primary" :loading="initExportLoading" :disabled="initExportLoading" >导出</a-button>
            </downloadexcel>

export default {
    data() {
        return {
            filename:"导出表格",//导出的文件名称
        }
    }
};