如何使用node和express框架迅速开启一个服务并写出简单的接口用于接口测试

mkdir demo cd demo npm init -y // 开启项目 新建index.js var express = require('express') var app = express() // respond with hello world when a GET request is made to the homepage app.get('/', function (req, res) { res.send('hello world') }) // POST method route app.post('/demo', function (req, res)