如何在Node.js中处理POST数据？

const http = require('http');
const querystring = require('querystring');

const server = http.createServer((req, res) => {
  if (req.method === 'POST') {
    let body = '';
    req.on('data', (chunk) => {
      body += chunk.toString();
    });
    req.on('end', () => {
      const postData = querystring.parse(body);
      // 处理postData，进行相应的业务逻辑
      res.end('Data received');
    });
  } else {
    res.end('Invalid request');
  }
});

server.listen(3000, () => {
  console.log('Server is running on port 3000');
});

npm install body-parser

const express = require('express');
const bodyParser = require('body-parser');

const app = express();

// 使用body-parser中间件
app.use(bodyParser.urlencoded({ extended: false }));

app.post('/', (req, res) => {
  const postData = req.body;
  // 处理postData，进行相应的业务逻辑
  res.send('Data received');
});

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