你可以使用Multer库来上传文件。它超级容易使用。

import multer from 'multer';

//specify where you want your files to be stored
var fileStorageEngine = multer.diskStorage({
    destination: function (req, file, cb) {
        cb(null, './images')
    },
    filename: function (req, file, cb) {
        cb(null, Date.now() + '--' + file.originalname)
    }
})
var upload = multer({ storage: fileStorageEngine });

//pass it as a middleware to a route where you expect to get a file upload
app.use('/api/file/', upload.single('image'), someRouterHere);