尝试从html表单和Node.js发送数据

<form action="/submit" method="POST">
  <!-- 表单元素 -->
  <input type="text" name="username" placeholder="用户名">
  <input type="password" name="password" placeholder="密码">
  <button type="submit">提交</button>
</form>

const express = require('express');
const app = express();

// 处理POST请求
app.post('/submit', (req, res) => {
  const username = req.body.username;
  const password = req.body.password;

  // 处理接收到的数据
  // ...

  res.send('数据已接收');
});

app.listen(3000, () => {
  console.log('服务器已启动');
});

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

// 解析POST请求的数据
app.use(bodyParser.urlencoded({ extended: false }));

// 处理POST请求
app.post('/submit', (req, res) => {
  const username = req.body.username;
  const password = req.body.password;

  // 处理接收到的数据
  // ...

  res.send('数据已接收');
});

app.listen(3000, () => {
  console.log('服务器已启动');
});