导入http系统模块：const http = require('http');
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const http = require('http')
//创建服务器实例对象
let server = http.createServe();
//绑定请求事件
server.on('request', (request, response) => {
response.end('Hello World!')
})
//监听端口3000
server.listen(3000)
//可以在浏览器中访问localhost:3000打印Hello World!
//---------------------------------------------------------
//简洁方法
const http = require('http')
http.createServer((request, response) => {
response.end('Hello World')
}).listen(3000)
//---------------------------------------------------------
//PS:listen方法还可以添加可选参数：ip地址、回调函数...
//例如
const http = require('http')
http.createServer((request, response) => {
response.end('Hello World')
}).listen(3000,'192.168.1.105', () => {
console.log('running...')
})
//此时在浏览器中需访问192.168.1.105:3000这个url才可查看
