js访问数据库

// 使用Fetch API发送GET请求
fetch('https://api.example.com/users')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));

// 使用Fetch API发送POST请求
fetch('https://api.example.com/users', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ name: 'John', age: 30 })
})
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));

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

app.use(bodyParser.json());

// 模拟数据库
let users = [];

// GET请求处理
app.get('/users', (req, res) => {
  res.json(users);
});

// POST请求处理
app.post('/users', (req, res) => {
  const user = req.body;
  users.push(user);
  res.status(201).json(user);
});

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

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