在请求中需要设置 responseType: blob

export const requestExport = (api, method, params = {}, config) => {const apiToken = localStorage.getItem('token');const data = method === 'GET' ? 'params' : 'data';let headers = {'BackServer-Token': `${apiToken}`,};if (config?.headers) {headers = {...headers,...config.headers,};}return new Promise((resolve, reject) => {axios({...config,url: baseUrl + api,method,[data]: params,headers,responseType: 'blob'}).then(res => {if (res.status === 200) {resolve(res)}}).catch(error => {ElMessage({message: '服务器繁忙请稍后重试！',type: 'error'})reject(error);});});
};

并且核心在于函数：

export const download = (fileName, res) => {const blob = new Blob([res.data],{type: 'application/vnd.ms-excel'});if ("download" in document.createElement("a")) {const elink = document.createElement("a");elink.download = fileName;elink.style.display = "none";elink.href = URL.createObjectURL(blob);document.body.appendChild(elink);elink.click();URL.revokeObjectURL(elink.href); // 释放URL 对象document.body.removeChild(elink);}
}

在页面中发送请求：
在 element 的表格组件中对选中的行进行导出

const exportTags = async () => {if (selectId.length < 1) {ElMessage.error('至少选择一个标签！')} else {await exportTag({'tag_ids': selectId}).then(res => {download('标签列表.xlsx', res)selectId = []}, (err) => {ElMessage.error('导出失败！')})}
}