Express 基于 Node.js 平台，快速、开放、极简的 Web 开发框架

npm init
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npm install express --save
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//导入express
const  express = require('express')
//创建app对象
const app = express()
//构建请求
app.get('/',(req, res)=>res.send('hello world'))
//配置app监听3000端口
app.listen(3000, ()=>console.log('Example app listening on port 3000!'))
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npm install express-generator -g
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express --view=pug service-manage
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cd service-manage
npm install
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//MacOS/Linux 默认监听3000端口
DEBUG=service-manage:* npm start
//Windows 默认监听3000端口
set DEBUG=service-manage:* & npm start
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var express = require('express')
//获取路由实例
var router = express.Router();
/* tools listing */
router.get('/',function (req, res ,next) {
    res.send('Welcome to visit tools... ')
})
router.post('/', function (req, res) {
    res.send('Got a POST request')
})
router.put('/user', function (req, res) {
    res.send('Got a PUT request at /user')
})
router.delete('/user', function (req, res) {
    res.send('Got a DELETE request at /user')
})
//导出tools路由
module.exports = router
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//导入toolsRouter模块
var toolsRouter = require('./routes/tools');
//添加路由规则
app.use('/tools', toolsRouter)
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router.all('/', function (req, res, next) {
    console.log('Accessing the secret section ...')
    next() // pass control to the next handler
})
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router.get('/users/:userId/books/:bookId',function (req, res ,next) {
    res.send(req.params)
})
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Route path: /users/:userId/books/:bookId
Request URL: http://localhost:3000/users/34/books/8989
req.params: { "userId": "34", "bookId": "8989" }
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npm i express-swagger-generator --save-dev
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const express = require('express');
const app = express();
const expressSwagger = require('express-swagger-generator')(app);
let options = {
    swaggerDefinition: {
        info: {
            description: 'This is a sample server',
            title: 'Swagger',
            version: '1.0.0',
        },
        host: 'localhost:3000',
        basePath: '/v1',
        produces: [
            "application/json",
            "application/xml"
        ],
        schemes: ['http', 'https'],
    securityDefinitions: {
            JWT: {
                type: 'apiKey',
                in: 'header',
                name: 'Authorization',
                description: "",
            }
        }
    },
    basedir: __dirname, //app absolute path
    files: ['./routes/**/*.js'] //Path to the API handle folder
};
expressSwagger(options)
app.listen(3000);
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http://localhost:3000/api-docs/api-docs
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http://editor.swagger.io/#
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npm install swagger-jsdoc swagger-ui-express --save
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// swagger配置信息
exports.swaggerConfig = {
    openapi: '3.0.0',
    title: 'Node Service API',
    version: '1.0.0',
    apis: ['./routes/*.js'],
    routerPath: '/api-docs'
}
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var swaggerUi = require('swagger-ui-express');
var swaggerJSDoc = require('swagger-jsdoc');
var config = require('../config')
exports.setSwagger = function (app) {
    const options = {
        definition: {
            openapi: config.swaggerConfig.openapi,
            info: {
                title: config.swaggerConfig.title,
                version: config.swaggerConfig.version
            }
        },
        apis: config.swaggerConfig.apis
    }
    const swaggerSpec = swaggerJSDoc(options)
    app.get('/api-docs.json', (req, res) => {
        res.setHeader('Content-Type', 'application/json')
        res.send(swaggerSpec)
    })
    app.use(config.swaggerConfig.routerPath, swaggerUi.serve, swaggerUi.setup(swaggerSpec))
}
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var swaggerConfig = require('./swagger')
...
var app = express();
...
swaggerConfig.setSwagger(app)
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npm install pm2 -g
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pm2 start app.js
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pm2 list
pm2 stop 0
pm2 restart 0
pm2 show 0
pm2 delete 0