由FormData表单上传数据的时候Node POST传输并未接收到数据，写文章记录一下，希望可以帮到大家
Vue.js 接口

export function login (formData) {
    const formDatas = new FormData();
    formDatas.append('username', formData.username)
    formDatas.append('password', formData.password)
    return request({
      url: '/login',
      method: 'post',
      data: formDatas
    })
}

服务端:

app.post('/login', (req, res) => { 
    console.log(req.body)
    res.send(req.body)
})

输出:

接下来看下POST行为如何接收参数

npm i connect-multiparty //安装依赖包

var multipart = require('connect-multiparty');
var multipartMiddleware = multipart();

//加入multipartMiddleware进行解析
app.post('/login',multipartMiddleware, (req, res) => {
    console.log(req.body)
    res.send(req.body)
})

成功: