(编辑:jimmy 日期: 2024/10/31 浏览:2)
一、开发环境准备
npm init -y //初始化仓库 npm i koa koa-router -S //安装koa和路由模块 npm i nodemon -S
二、开启node服务
//index.js const koa = require("koa"); const router = require("koa-router")(); const app = new koa(); router.get("/",async ctx=>{ ctx.body = "我是首页" }) app.use(router.routes()); app.listen(8080);
三、配置art-template
3-1 安装依赖
npm install koa-art-template art-template -S
四、拆分路由系统
//routers-index.js const router = require("koa-router")(); router.get("/", async ctx => { await ctx.render('index'); }) module.exports = router;
//index.js const koa = require("koa"); const router = require('./routers/index.js'); const render = require('koa-art-template'); const app = new koa(); const path = require("path"); render(app, { root: path.join(__dirname, 'views'), extname: '.html', debug: process.env.NODE_ENV !== 'production' }); app.use(router.routes()); app.listen(8080);
五、初始化项目的配置文件
//init-config.js const path = require("path"); const render = require('koa-art-template'); const router = require('../routers/index'); function initConfig(app) { // process.cwd()可以读取项目的路径 render(app, { root: path.join(process.cwd(), 'views'), extname: '.html', debug: process.env.NODE_ENV !== 'production' }); app.use(router.routes()); } module.exports = initConfig;
//index.js const koa = require("koa"); const app = new koa(); let initConfig = require('./init/config'); initConfig(app); app.listen(8080);
六、MVC设计项目结构
model -->数据层 views -->视图层 controllers -->视图控制层
//routers--index.js const router = require("koa-router")(); const controllers = require("../controllers"); // 只写文件名默认会读取文件里的index.js router.get("/", controllers.index) module.exports = router;
//controller--index.js let index = async ctx=>{ await ctx.render('index'); } module.exports = { index }
七、获取post传值
//1.安装依赖 npm i koa-bodyparser -S
//2.进行项目的配置 var Koa = require('koa'); var bodyParser = require('koa-bodyparser'); var app = new Koa(); app.use(bodyParser()); app.use(async ctx => { //3.取值 ctx.request.body ctx.body = ctx.request.body; });
八、连接数据库
npm i mongoose -S
//models --db.js const mongoose = require('mongoose'); mongoose.connect( 'mongodb://127.0.0.1:27017/studentManage', {useNewUrlParser: true},(err)=>{ if(err) throw err; console.log("database连接成功") }); module.exports = mongoose;
//models --user.js var mongoose = require('./db'); var UserSchema = new mongoose.Schema({ name:String, pwd:String }) var User = mongoose.model('User',UserSchema,'user'); module.exports = User;
//controllers -- index.js let doLogin = async ctx=>{ let {user,pwd} = ctx.request.body; let data = await UserModel.find({name:user,pwd}); console.log(data); // 数据库中有对应的用户名密码则数组有东西,没有则数组没东西 if(data.length>0){ /* 登录成功 */ ctx.body = "登录成功" }else{ ctx.body = "用户名和密码不存在" } }
总结