使用Express.js在Node.js中设置路由的最佳方法

// routes/index.js
const express = require('express');
const router = express.Router();

router.get('/', (req, res) => {
  res.send('Hello, World!');
});

module.exports = router;

// app.js
const express = require('express');
const app = express();
const indexRouter = require('./routes/index');

app.use('/', indexRouter);

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});