将文件直接写入Response对象，而不是通过中间文件

var xl = require('excel4node');
var wb = new xl.Workbook();
// sends Excel file to web client requesting the / route
// server will respond with 500 error if excel workbook cannot be generated
var express = require('express');
var app = express();
app.get('/', function(req, res) {
  wb.write('ExcelFile.xlsx', res);
});
app.listen(3000, function() {
  console.log('Example app listening on port 3000!');
});

回答晚了，但您应该在前端创建blob时指定内容类型，然后在DOM中创建一个链接，并向浏览器指定必须下载该文件：

axios.get(`${your backend url goes here}/path/to/export`, {
            responseType: 'blob',
            headers: {
              'Authorization': `Bearer ${token}` //Or any auth method
            }
          }).then(res => {
            const url = window.URL.createObjectURL(new Blob([res.data]), {type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'}); //specify CT
            const link = document.createElement('a'); // attach link to DOM
            link.href = url;
            link.setAttribute('download', 'File.xlsx');
            document.body.appendChild(link);
            link.click(); // Auto dl the file
            link.remove(); // Remove the link
          }).catch(err => {
            console.log(err);
          })