安装 multer 模块

  npm install multer --save

简单使用

// test.js
const express = require('express');
const multer = require('multer');
const app = express();
const upload = multer({
  dest: 'c:/tmp'
});

// 单个文件的上传
app.post('/upload', upload.single('avator'), (req, res) => {
  res.send(req.file);
})

// 多个文件的上传
app.post('/uploadMany', upload.array('photos', 3), (req, res) => {
  res.send(req.files);
})

app.listen(3000);