text: let user = require('./User');
  
  console.log(`userName:${user.userName}`);
  
  console.log(`I'm ${user.userName},I say ${user.sayHello()}`);
  
  let http = require('http');
  let url = require('url');
  let util = require('util');
  
  let server = http.createServer((req,res)=>{
    res.statusCode = 200;
  
    res.setHeader("Content-Type","text/plain; charset=utf-8");
    res.end(util.inspect(url.parse(req.url)));
  });
  
  server.listen(3000,'127.0.0.1', ()=>{
    console.log("服务器已经运行，请打开浏览,输入:http://127.0.0.1:3000/ 来进行访问.")
  });
  