四种语言实现最简单的web server

语言：Java

框架：Spring Boot

 1 package com.example.springboot01.controller;
 2 
 3 import org.springframework.web.bind.annotation.RequestMapping;
 4 import org.springframework.web.bind.annotation.RestController;
 5 
 6 @RestController
 7 public class indexController {
 8 
 9     @RequestMapping("/")
10     public String Index(){
11         return "hello world Spring Boot";
12     }
13 }

语言：JavaScript(Node.js)

框架：Express

1 const express = require('express')
2 const  app = express()
3 app.get('/',(req,res)=>{
4     res.send('hello world Express')
5 })
6 app.listen(10000,()=>{
7     console.log('开始监听端口:10000')
8 })

语言：Python

框架：Flask

1 from flask import Flask
2 app = Flask(__name__)
3 @app.route('/')
4 def index():
5     return 'hello world Flask'
6 if __name__ == '__main__':
7     print('开始监听端口:5000')
8     app.run()

语言：C#

框架：Asp.Net Web Api

 1 using System;
 2 using System.Web.Mvc;
 3 
 4 namespace WebApplication1.Controllers
 5 {
 6     public class HomeController : Controller
 7     {
 8         public String Index()
 9         {
10             return "hello world Asp.Net Web Api";
11         }        
12     }
13 }