// require语法 导入模块//http，node内置模块let http = require(‘http‘)//创建一个服务器通道, 并传入回调函数let server = http.createServer((request, response) => { //回调函数接受request对象和response对象 // 获得HTTP请求的method和url: console.log(request.method + ‘: ‘ + request.url); // 将HTTP响应200写入response, 同时设置Content-Type: text/html: response.writeHead(200, {‘Content-Type‘: ‘text/html‘}); // 将HTTP响应的HTML内容写入response: response.end(‘<h1>Hello world!</h1>‘);})// 让服务器监听8888端口:server.listen(8888);console.log(‘Server is running at http://127.0.0.1:8080/‘);//在命令提示符下运行该程序，可以看到//以下输出：//$ node hello.js //Server is running at http://127.0.0.1:8080/