提示：学习express，搭建管理系统

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前言

需求：主要学习express，所以先写service部分

一、新建user表

1、express_service数据库，鼠标右键点击表

2、点击新建表

3、创建user表

3、ctrl+s保存，输入user，点击确认


4、设计表添加栏位userID、userName、password

二、安装bcryptjs、MD5、body-parser

bcryptjs是对密码进行加密的插件
body-parser对http请求进行解析

 npm install bcryptjs --save

npm install md5 --save

npm install body-parser --save

三、修改config/db.js

const mysql = require('mysql');
const pool = mysql.createPool({
    host:'localhost',
    ipport:'3306',
    user:'root',
    password:'123456',
    database:'express_service'
});

const query = (sql,params,callback)=>{
    return new Promise((resolve,reject)=>{
        pool.getConnection((err,connect)=>{
            if(err) reject(err);
            connect.query(sql,params,(err,result)=>{
                if(err) reject(err);
                return resolve(result);
            });
        });
    });
}
module.exports = query;

四、新建config/bcrypt.js

bcrypt.js

const bcryptJs = require('bcryptjs');

const bcrypt = {
    hash:(txt,salt=9)=>{
        return bcryptJs.hashSync(txt,salt);
    },
    compare:(txt,hash)=>{
        return bcryptJs.compareSync(txt,hash);
    },
}

module.exports = bcrypt;

五、新建models文件夹和models/user.js

user.js

const query = require('../config/db');
const bcrypt = require('../config/bcrypt');
const md5 = require('md5');
const secretKey = 'longlongago';

const errFun = (msg,code)=>{
    return {
        code:code||500,
        success:false,
        msg:msg||'操作失败'
    }
}

const sucFun = (data,msg)=>{
    return {
        code:200,
        success:true,
        msg:msg||'操作成功',
        data,
    }
}

const userDao = {
    register:async(data)=>{
        //这里只添加user到数据库，不做验证和检验
        const userId = md5(data.userName+secretKey);
        const password = bcrypt.hash(data.password+secretKey);
        const sql = `insert into user (userId,userName,password) values('${userId}','${data.userName}','${password}')`;
        const result = await query(sql);
        console.log(result)
        // return result;
        if(result&&result.affectedRows==1)return sucFun(result[0],'添加用户成功');
        return errFun('添加用户失败');
    },
}

module.exports = userDao;

五、index.js引入使用body-parser

const express = require('express');

const app = express();
const router = express.Router();

const bodyParser = require('body-parser');
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

const port = 1990;

require('./config/db');

//初始化路由
require('./routes/index')(router);

app.use('/', router);
app.listen(port,()=>{
    console.log('http://localhost:'+port);
})

六、修改routes/user.js

const userDao = require('../models/user');
const userRoutes = (router)=>{
    router.post('/user/register',async (req,res)=>{
        const result = await userDao.register(req.body);
        res.json(result);
    });
}
module.exports = userRoutes;

七、启动项目

npm run dev

八、配置Apipost接口/user/register

使用到的工具是Apipost
1、新建目录

2、目录命名express_service

3、鼠标右键点击express_service，新建user子目录


4、右键点击user子目录，新建接口

5、接口配置
url:http://localhost:1990/user/register
name:/user/register
params:{
“userName”:“longlongago”,
“password”:“123456”
}

九、访问/user/register

总结

踩坑路漫漫长@~@