一：复制官网的代码，建立一个简单的服务器

const http = require('http');const hostname = '127.0.0.1';const port = 3000;const server = http.createServer((req, res) => {  res.statusCode = 200; //返回的状态码  res.setHeader('Content-Type', 'text/plain');  //返回类型为纯文本  res.end('Hello World\n');});server.listen(port, hostname, () => {  console.log(`Server running at http://${hostname}:${port}/`);});

二：了解nodejs的模块

 

三：创建一个简单的校园模块:

1:添加学生的模块: students.js

function add(name) {	console.log('add student'+ name)}exports.add = add

2:添加老师的模块: teacher.js

function add(name) {	console.log('add teacher'+ name)}exports.add = add

3:添加班级的模块: klass.js

// 使用模块之前需要requirevar student = require('./student')  //将模块对象赋值给局部变量var teacher = require('./teacher')function add(teacherName, students) {	teacher.add(teacherName)	students.forEach(function (item, index) {		student.add(item)	})}exports.add = add

4:添加学校的模块: index.js

var klass = require('./klass')exports.add = function (klasses) {	forEach(function (item, index) {		var _klass = item		var teacherName = item.teacherName		var students = item.students		klass.add(teacherName, students)	})}