Express
Express 是一个保持最小规模的灵活的 Node.js Web 应用程序开发框架，为 Web 和移动应用程序提供一组强大的功能。
基于Express的框架有以下
Feathers: Build prototypes in minutes and production ready real-time apps in days.
ItemsAPI: Search backend for web and mobile applications built on Express and Elasticsearch.
KeystoneJS: Website and API Application Framework / CMS with an auto-generated React.js Admin UI.
Kraken: Secure and scalable layer that extends Express by providing structure and convention.
LEAN-STACK: The Pure JavaScript Stack.
LoopBack: Highly-extensible, open-source Node.js framework for quickly creating dynamic end-to-end REST APIs.
MEAN: Opinionated fullstack JavaScript framework that simplifies and accelerates web application development.
Sails: MVC framework for Node.js for building practical, production-ready apps.
Bottr: Framework that simplifies building chatbot applications.
Hydra-Express: Hydra-Express is a light-weight library which facilitates building Node.js Microservices using ExpressJS.
Blueprint: a SOLID framework for building APIs and backend services
Locomotive: Powerful MVC web framework for Node.js from the maker of Passport.js
graphql-yoga: Fully-featured, yet simple and lightweight GraphQL server
Express Gateway: Fully-featured and extensible API Gateway using Express as foundation
Dinoloop: Rest API Application Framework powered by typescript with dependency injection
Kites: Template-based Web Application Framework
中文官网：http://www.expressjs.com.cn/
安装node+express
1、apt-get预设node repository
sudo apt-get update
sudo apt-get install -y python-software-properties software-properties-common
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs 或者 sudo apt-get install nodejs-legacy
输入测试 node -v 或者nodejs -v
2、安装npm
sudo apt-get install npm
输入测试npm -v
3、国内可以安装cnpm
sudo npm install -g cnpm --registry=https://registry.npm.taobao.org
4、安装express框架
sudo npm install express -gd 或者 sudo cnpm install express -gd
-g代表安装到NODEPATH的lib里面，而-d代表把相依性套件也一起安装。
如果沒有-g的话会安装目前所在的目录(会建立一个nodemodules的文件夹)
sudo apt-get install express-generator （sudo apt-get install node-express-generator）
输入测试express --version
5、node升级
sudo npm install -g n #全局安装n模块，用于升级node
sudo n latest #安装官方最新版本
sudo n stable #安装官方稳定版本
sudo n lts #安装官方最新LTS版本sudo npm install -g npm #更新npm
Express项目建立
1、建立Express项目（example）
express example
2、启动项目
进入example目录，运行服务器：
npm start
mongoose安装和使用
1、安装mongodb
sudo apt-get install mongodb
测试：输入mongo
默认数据存储 /var/lib/mongodb
默认log文件 /var/log/mongodb/mongodb.log
默认配置文件 /etc/mongodb.conf
关闭，开启，重启mongodb服务
sudo mongodb service stop
sudo mongodb service start
sudo mongodb service restart
配置文件路径：
sudo vi /etc/mongodb.conf
dbpath是数据存放的地址修改为你想存放的路径
logpath是日志存放的地址
修改配置后需要重启
sudo mongodb service restart
2、安装mongoose
sudo npm install mongoose
3、例子代码
建立数据库连接mongo.js文件
var Mongoose = require("mongoose"); //
Mongoose.Promise = global.Promise;
var db Mongoose.createConnection('mongodb://localhost:27017/test');
//链接错误
db.on('error', function(error) {
console.log(error);
});
//链接成功
db.once('open',function(){
console.log('Mongoose connection opened');
});
//链接关闭
db.on('disconnected', function () {
console.log('Mongoose connection disconnected');
});
module.exports = db;
建立表文件user.js文件
var Mongoose = require('mongoose');
var mongo = require('./mongo');
var ObjectId = Mongoose.Schema.ObjectId;
//=============================================
//用户记录
var UserSchema = new Mongoose.Schema({
uid : {type : Number}, //序号
type : {type : Number, default:0},
name : {type : String},
birthday : {type : Date}, //
status : {type : Number, default:1}
},{
versionKey: false, //版本
timestamps: true //时间戳createdAt、updatedAt
});
UserSchema.index({'uid':1}); //建立uid索引，正序
UserSchema.index({'name':1}); //建立name索引，正序
var UserModel = mongo.model('users', UserSchema);
module.exports = UserModel;
mongoose API资料：
https://mongoosejs.com/docs/api.html
3、mongo升级
未完待续
