mkdir myapp
cd myapp
npm init
npm install express --save
node hello.js例子
// example hello.js
const express = require('express');
const app = express();
const port = 3000;
app.get('/', (req, res) => {
res.send('hello,world');
});
app.listen(port, () => {
console.log('Example app listening on');
});生成器
npx express-generator
express -h
express myapp
npm install
npm start基本路由
// app.METHOD(PATH, HANDLER) 基本路由
app.get('/', (req, res) => {
res.send('hello,world');
});
app.post('/', function (req, res) {
res.send('Got a POST request');
});
app.put('/user', function (req, res) {
res.send('Got a PUT request at /user');
});
app.delete('/user', function (req, res) {
res.send('Got a DELETE request at /user');
});静态文件
app.use('/static',express.static('public'))； //访问public下面的文件,路径带上/static
// http://localhost:3000/static/images/kitten.jpg
// http://localhost:3000/css/style.css
// http://localhost:3000/js/app.js
// http://localhost:3000/images/bg.png
// http://localhost:3000/hello.html