Javascript 从获取路由（nodejs）检索数据

我正在从一个网站学习nodejs和数据库

在本网站中，为了从app.use（'/server/profil'）检索数据，我们必须复制以下代码

我是这样做的，但我有一个问题： app.post中的req.body检索空对象。它应该检索stud对象

需要帮忙吗

谢谢你能帮助我的人

    const express = require('express');

    const app = express()
    const cors = require('cors');
    app.use(cors());

    app.use(express.json());
    app.use(express.urlencoded({extended: true}));

    // so for every file we want on public we do not need to specify the path as it is allready         specified.
    // indeed this code give us this path http://localhost:3000/public
    app.use(express.static('public'));

    app.use((req, res, next) => {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content, Accept,         Content-Type, Authorization');
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, PATCH, OPTIONS');
    next();
    });

    app.post('/server/profil', (req, res, next) => {
    console.log(req.body);
    res.status(201).json({
    message: 'Thing created successfully!'
    });
    });

    app.use('/server/profil', (req, res, next) => {
    const stuff = [
    {
    _id: 'oeihfzeoi',
    title: 'My first thing',
    description: 'All of the info about my first thing',
    imageUrl: '',
    price: 4900,
    userId: 'qsomihvqios',
   },
   {
    _id: 'oeihfzeomoihi',
    title: 'My second thing',
    description: 'All of the info about my second thing',
    imageUrl: '',
    price: 2900,
    userId: 'qsomihvqios',
    },
    ];
    res.status(200).json(stuff);
    res.send(stuff);
    });

    module.exports = app;