node+MySQL+Express实现账户登录
- 实现技术
- 开发工具
- 项目结构
- 效果图
- app.js代码
- db.js
- router下的account.js
- db下的account.js
- login.html
- 数据库结构
实现技术
node.js,MySQL5.7(8.0以上版本会报错)，layui(前端框架)，Express
notify(消息通知layui插件)
开发工具
编码：vscode
数据库：navicat
项目结构
效果图
app.js代码
// 引入express模块
const express = require('express');
const path = require('path');
const { app, pool } =require('./db')
const user = require('./router/account')
// 设置端口号
const port = process.env.PORT || 8080; // 设置默认端口号
// const port = 8080;//设置端口号// 静态资源目录路径
const staticPath = path.join(__dirname, 'public');
// 登录相关页面基础路径
const loginBasePath = path.join(__dirname, 'views/login');// 使用静态资源
app.use(express.static(staticPath));// 页面路由处理
const sendPage = (route, filename) => app.get(route, (req, res) => res.sendFile(path.join(loginBasePath, filename)));// 跳转到登录页面
sendPage('/', 'login.html');
// 跳转到注册页面
sendPage('/register', 'register.html');
// 跳转到重置密码页面
sendPage('/rest', 'restPassword.html');
// 跳转到首页
sendPage('/main', 'main.html');
//跳转到短信验证登录页面
sendPage('/sms', 'smsLogin.html');
// 用户相关路由
app.use('/user', user)// 监听端口
app.listen(port, () => console.log(`服务器在端口 ${port} 上启动成功`));
db.js
const mysql = require('mysql2')
const express = require('express')
const app = express()
const router = express.Router();// 解析参数
const bodyParser = require('body-parser')
// json请求
app.use(bodyParser.json())
// 表单请求
app.use(bodyParser.urlencoded({extended: false}))
/*** 配置mysql*/
const option = {host: 'localhost',user: 'root',password: 'root',port: '3307',database: 'bookInfo',connectTimeout: 5000, //连接超时multipleStatements: false //是否允许一个query中包含多条sql语句
}
let pool;
repool()
function Res ({ code = 200, msg = '', data = {} }) {this.code = code;this.msg = msg;this.data = data;
}
function resJson (_res, result) {return _res.json(new Res(result))
}
// 断线重连机制
function repool() {// 创建连接池pool = mysql.createPool({...option,waitForConnections: true, //当无连接池可用时，等待（true）还是抛错（false）connectionLimit: 100, //连接数限制queueLimit: 0 //最大连接等待数（0为不限制）})pool.on('error', err => {err.code === 'PROTOCOL_CONNECTION_LOST' && setTimeout(repool, 2000)})app.all('*', (_,__, next) => {pool.getConnection( err => {err && setTimeout(repool, 2000) || next()})})
}
module.exports = { app, pool, router, resJson }router下的account.js
const { pool, router, resJson } = require('../db');
const userSQL = require('../db/account');
const path = require('path');/*** 用户登录功能*/
router.post('/login', (req, res) => {// 获取请求参数let user = {account: req.body.account,password: req.body.password};let _res = res;// 判断参数是否为空if (!user.account) {return resJson(_res, {code: -1,msg: '账户不能为空'});}// 判断参数是否为空if (!user.password) {return resJson(_res, {code: -1,msg: '密码不能为空'});}// 从连接池获取连接pool.getConnection((err, conn) => {conn.query(userSQL.queryByNamePassword, [user.account, user.password], (e, result) => {if (e) {return resJson(_res, { code: -1, msg: e });}// 通过用户名和密码索引查询数据有数据说明用户存在且密码正确if (result && result.length) {// 登录成功resJson(_res, {code: 0,msg: '登录成功！'});} else {// 账户或密码错误resJson(_res, {code: -1,msg: '账户或密码错误'});}});pool.releaseConnection(conn); // 释放连接池，等待别的连接使用});
});module.exports = router;
db下的account.js
const accountSQL = {queryByNamePassword: 'select * from tb_account where account=? and password=?', // 通过账户和密码索引查询用户
}module.exports = accountSQL
login.html
<!DOCTYPE html>
<html>
<head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><title>暖意书籍管理系统登录</title><!-- 设置系统图标 --><link rel="shortcut icon" href="../icon/login.ico" type="image/x-icon" /><!-- 引用layui文件中layui.css --><link rel="stylesheet" href="../layui/css/layui.css" media="all"></link>
</head>
<style>.login-container{width: 320px; margin: 241px auto 0;}body {background-image: url(../image/login_index.jpg);background-size: cover;background-repeat: repeat;}.register-link-container {text-align: right; /* 右对齐文本 */}</style>
<body>
<form class="layui-form"><div class="login-container"><div class="layui-form-item"><div class="layui-input-wrap"><div class="layui-input-prefix"><i class="layui-icon layui-icon-username"></i></div><input type="number" name="account" lay-verify="required|phone" placeholder="账户" lay-reqtext="请先填写账户" lay-vertype="tips" autocomplete="off" class="layui-input" lay-affix="clear"></div></div><div class="layui-form-item"><div class="layui-input-wrap"><div class="layui-input-prefix"><i class="layui-icon layui-icon-password"></i></div><input type="password" name="password" lay-verify="required" placeholder="密 码" lay-reqtext="请填写密码" lay-vertype="tips" autocomplete="off" class="layui-input" lay-affix="eye"></div></div><div class="layui-form-item"><input type="checkbox" name="remember" lay-skin="primary" title="记住密码"><a href="/rest" style="float: right; margin-top: 7px;color: #435594;">忘记密码？</a></div><div class="layui-form-item"><button class="layui-btn layui-btn-fluid layui-bg-black" lay-submit lay-filter="loginBtn">登 录</button></div><div class="layui-form-item"><a href="/sms" style="position: fixed;color: #435594;">短信快捷登录</a><div class="register-link-container"><a href="/register" style="color: #435594;">注册帐号</a></div></div></div>
</form><!-- 请勿在项目正式环境中引用该 layui.js 地址 -->
<script src="../layui/layui.js"></script>
<script src="../notify/notify.js"></script>
<script>layui.use(['notify'],function(){var $ = layui.$;var form = layui.form;var layer = layui.layer;var util = layui.util;var notify = layui.notify;/* 方法1：利用layui的form模块的进行表单提交事件form.on('submit(loginBtn)', function(data){var field = data.field; // 获取表单字段值var loadIndex = layer.msg('验证登录中，请稍后...', {icon: 16,shade: 0.01});;setTimeout(function(){layer.close(loadIndex);$.ajax({url: 'http://localhost:3000/user/login',type: 'post',data: {account:field.account,password:field.password}, // 数据转换为JSON字符串success: function(res) {if(res.code == 0){layer.msg(res.msg);setTimeout(function(){location.href = 'http://localhost:3000/main';}, 1000);}else{layer.msg(res.msg);}}})}, 2000);// 阻止表单跳转return false; });*/// 方法2： 引用第三方消息通知组件进行表单提交事件form.on('submit(loginBtn)', function(data){var field = data.field; // 获取表单字段值if(field.password.length < 6){notify.info({msg:'密码长度不能小于6位',position:'vcenter',shadow:true, closable:false,duration:1000});return false;}/*加载提示：用法 notify.info({msg:"提示",//提示信息closable:true,//是否显示关闭按钮 默认是trueposition:'vcenter',// 指定弹出位置:默认topCenter，可选值：bottomRight|bottomLeft|topRight|topLeft|topCenter|bottomCenter|vcenter"shadow:true,// 是否显示阴影默认是falseduration:2000,//显示时间默认3000，为 0 时不自动关闭});*/notify.loading({msg:'验证登录中，请稍后...',position:'vcenter',shadow:true, closable:false});//显示加载中setTimeout(function(){notify.destroyAll();//关闭所有通知$.ajax({url: 'http://localhost:8080/user/login',type: 'post',data: {account:field.account,password:field.password}, // 数据转换为JSON字符串success: function(res) {if(res.code == 0){//弹出成功提示notify.success({msg:res.msg,position:'vcenter',shadow:true, closable:false,duration:1000});//跳转到系统首页，延迟500毫秒setTimeout(function(){location.href = 'http://localhost:8080/main';}, 500);}else{//弹出错误提示notify.error({msg:res.msg,position:'vcenter',shadow:true, closable:false,duration:1000});}}})}, 2000);// 阻止表单跳转return false; //如果不加的话，表单不会跳转但不会进行登录操作});});</script></body>
</html>
数据库结构
