用express+mongoose快速开发API接口用express+mongoose快速开发API接口

1.初始化项目
npm init -y
2.使用Express框架创建服务器，用mongoose连接数据库，cors解决跨域
npm i express mongoose cors
3.新建一个文件夹http_serve，目录结构

文章图片

【用express+mongoose快速开发API接口】3.1 index.js文件，启动node服务

const express = require('express') const cors = require('cors') const app = express()//解决跨域 app.use(cors()) //express内置了post参数解析 app.use(express.urlencoded({ extended: false }))const apiRouter = require('./router') app.use(apiRouter)app.listen(3008, function () { console.log('app is runing at port 3008'); })

3.2 db.js 连接mongoDB

const mongoose = require('mongoose')const IP = 'localhost' const PORT = 27017 const DB_NAME = 'org'//连接 mongoose.connect(`mongodb://${IP}:${PORT}/${DB_NAME}`, { useNewUrlParser: true })//连接成功 mongoose.connection.on('connected', () => { console.log('Mongoose connection success') })//连接异常 mongoose.connection.on('error', (err) => { console.log('Mongoose connection error:' + err) })//连接成功 mongoose.connection.on('disconnected', () => { console.log('Mongoose connection disconnected') })module.exports = mongoose

3.3 router.js 定义接口以及方法

const express = require('express') const router = express.Router()const dataList = require('../serve_schema/dataList')let result = { code: 200, msg: 'ok' }//创建数据 router.post('/postData', async (req, res) => { let postData = https://www.it610.com/article/new dataList({ ...req.body }) await postData.save(err => { if (err) { throw err } else { res.json({ ...result }) } }) })//获取数据 router.get('/getList', async (req, res) => { let { start, limit } = req.query if (start == undefined) { start = 0; } if (limit == undefined) { limit = 10; } let data = https://www.it610.com/article/await dataList.find().skip(Number(start)).limit(Number(limit)); res.json({ ...result, data }) })module.exports = router

3.4 serve_scheam文件夹下的dataList.js，创建数据库模型，也就是创建一个数据库的表，用来存数据，设置数据的一些字段等。

const mongoose = require('../serve_setting/db') const { Schema } = mongooseconst userSchema = new Schema({ username: { type: String }, password: { type: String }, email: { type: String }, mobile: { type: String }, status: { type: Number, default: 1 }, }, { versionKey: false }) // versionKey 不显示版本字段module.exports = mongoose.model('User', userSchema, 'user') //第三个参数，指定集合名，不自动匹配对应的复数形式users。

4.全局安装一个自动重启的node工具nodemon
npm install -g nodemon
5.配置启动文件，pageage.json