我无法在Node.js中使用multer upload.fields()或multer.arrays上传文件

const multer = require('multer');
const upload = multer({ dest: 'uploads/' });

app.post('/upload', upload.fields([{ name: 'file1', maxCount: 1 }, { name: 'file2', maxCount: 1 }]), (req, res) => {
  // 处理上传的文件
});

const multer = require('multer');
const storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, 'uploads/');
  },
  filename: function (req, file, cb) {
    cb(null, file.originalname);
  }
});
const upload = multer({ storage: storage });

app.post('/upload', upload.fields([{ name: 'file1', maxCount: 1 }, { name: 'file2', maxCount: 1 }]), (req, res) => {
  // 处理上传的文件
});

const multer = require('multer');
const upload = multer({
  dest: 'uploads/',
  limits: { fileSize: 2 * 1024 * 1024 } // 2MB
});

app.post('/upload', upload.fields([{ name: 'file1', maxCount: 1 }, { name: 'file2', maxCount: 1 }]), (req, res) => {
  // 处理上传的文件
});