如何使用express将formData文件上传到node js？

npm init -y

npm install express multer

const express = require('express');
const multer = require('multer');
const app = express();

// 设置存储文件的目录和文件名
const storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, 'uploads/'); // 设置文件存储的目录
  },
  filename: function (req, file, cb) {
    cb(null, Date.now() + '-' + file.originalname); // 设置文件名
  }
});

// 创建multer实例，配置上传限制
const upload = multer({
  storage: storage,
  limits: {
    fileSize: 1024 * 1024 * 5 // 限制文件大小为5MB
  }
});

// 处理文件上传的路由
app.post('/upload', upload.single('file'), (req, res) => {
  if (req.file) {
    // 上传成功
    res.send('File uploaded!');
  } else {
    // 上传失败
    res.status(400).send('No file uploaded.');
  }
});

// 启动服务器
app.listen(3000, () => {
  console.log('Server is running on port 3000');
});

node your-file-name.js