功能主要用MySQL数据库，包括登录、注册、主页三部分；下面就一步步开始吧！
1.新建express + ejs 项目：user
cd 工作目录 express -e user cd user && npm install
2.创建数据库
CREATE DATABASE IF NOT EXISTS user CHARACTER SET UTF8; USE user; SET FOREIGN_KEY_CHECKS=0; DROP TABLE IF EXISTS `userinfo`; CREATE TABLE `userinfo` ( `Id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键', `UserName` varchar(64) NOT NULL COMMENT '用户名', `UserPass` varchar(64) NOT NULL COMMENT '用户密码', PRIMARY KEY (`Id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='用户信息表';
3.修改package.json文件,安装session和mysql模块
{
"name": "user",
"version": "0.0.1",
"private": true,
"scripts": {
"start": "node ./bin/www"
},
"dependencies": {
"express": "~4.0.0",
"static-favicon": "~1.0.0",
"morgan": "~1.0.0",
"cookie-parser": "~1.0.1",
"body-parser": "~1.0.0",
"debug": "~0.7.4",
"ejs": "~0.8.5",
"express-session" : "latest",
"mysql" : "latest"
}
}执行
npm install
安装完后 执行
express -e
destination is not empty, continue? [y/N] y create : . create : ./package.json create : ./app.js create : ./public create : ./public/javascripts create : ./public/images create : ./public/stylesheets create : ./public/stylesheets/style.css create : ./routes create : ./routes/index.js create : ./routes/users.js create : ./views create : ./views/index.ejs create : ./views/error.ejs create : ./bin create : ./bin/www install dependencies: $ cd . && npm install run the app: $ DEBUG=user:* npm start
基本的express 生成完成
安装完成后，打开app.js文件，添加如下代码
var express = require('express');
var path = require('path');
var favicon = require('static-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var session = require('express-session');
...
//这里传入了一个密钥加session id
app.use(cookieParser('Wilson'));
//使用靠就这个中间件
app.use(session({ secret: 'wilson'}));
...4.样式和JQuery文件
样式： 样式主要使用了bootstrap 3.0.3 https://github.com/twbs/bootstrap/releases/tag/v3.0.3
JQuery: jquery 1.11.1 http://jquery.com/download/
添加以上文件到项目中，目录结构如下
5 增加两个css navbar-static-top.css
body {
min-height: 2000px;
}
.navbar-static-top {
margin-bottom: 19px;
}
navbar-static-top.cssbody {
padding-top: 40px;
padding-bottom: 40px;
background-color: #eee;
}
.form-signin {
max-width: 330px;
padding: 15px;
margin: 0 auto;
}
.form-signin .form-signin-heading,
.form-signin .checkbox {
margin-bottom: 10px;
}
.form-signin .checkbox {
font-weight: normal;
}
.form-signin .form-control {
position: relative;
font-size: 16px;
height: auto;
padding: 10px;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
.form-signin .form-control:focus {
z-index: 2;
}
.form-signin input[type="text"] {
margin-bottom: 10px;
border-bottom-left-radius: 0;
border-bottom-right-radius: 0;
}
.form-signin input[type="password"] {
margin-bottom: 10px;
border-top-left-radius: 0;
border-top-right-radius: 0;
}
signin.css规划路由，并新建相关文件
1.路由
首页：/
注册页：/reg
登录页：/login
安全退出：/logout
(红色表示需要新建的)
2.routes目录下新建如下文件
reg.js
login.js
logout.js
3.views目录下新建：
header.ejs
reg.ejs
login.ejs
4.打开app.js文件，添加如下代码
...
var routes = require('./routes/index');
var reg = require('./routes/reg');
var login = require('./routes/login');
var logout = require('./routes/logout');
...
app.use('/', routes);
app.use('/reg', reg);
app.use('/login', login);
app.use('/logout', logout);
...实现登录和注册需要的数据访问方法
我们新建一个models文件夹，在其中新建user.js，实例代码如下
var mysql = require('mysql');
var DB_NAME = 'test';
var pool = mysql.createPool({
host : '127.0.0.1',
user : 'root',
password : ''
});
pool.on('connection', function(connection) {
connection.query('SET SESSION auto_increment_increment=1');
});
function User(user){
this.username = user.username;
this.userpass = user.userpass;
};
module.exports = User;
pool.getConnection(function(err, connection) {
var useDbSql = "USE " + DB_NAME;
connection.query(useDbSql, function (err) {
if (err) {
console.log("USE Error: " + err.message);
return;
}
console.log('USE succeed');
});
//保存数据
User.prototype.save = function save(callback) {
var user = {
username: this.username,
userpass: this.userpass
};
var insertUser_Sql = "INSERT INTO userinfo(id,username,userpass) VALUES(0,?,?)";
connection.query(insertUser_Sql, [user.username, user.userpass], function (err,result) {
if (err) {
console.log("insertUser_Sql Error: " + err.message);
return;
}
// connection.release();
console.log("invoked[save]");
callback(err,result);
});
};
//根据用户名得到用户数量
User.getUserNumByName = function getUserNumByName(username, callback) {
var getUserNumByName_Sql = "SELECT COUNT(1) AS num FROM userinfo WHERE username = ?";
connection.query(getUserNumByName_Sql, [username], function (err, result) {
if (err) {
console.log("getUserNumByName Error: " + err.message);
return;
}
// connection.release();
console.log("invoked[getUserNumByName]");
callback(err,result);
});
};
//根据用户名得到用户信息
User.getUserByUserName = function getUserNumByName(username, callback) {
var getUserByUserName_Sql = "SELECT * FROM userinfo WHERE username = ?";
connection.query(getUserByUserName_Sql, [username], function (err, result) {
if (err) {
console.log("getUserByUserName Error: " + err.message);
return;
}
// connection.release();
console.log("invoked[getUserByUserName]");
callback(err,result);
});
};
});有这三个方法，基本登录注册就够了^_^!
注册
1.先来布局一下HTML和CSS，加上前端验证及一些提示信息显示（reg.ejs）
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title><%= title %></title>
<link rel="stylesheet" type="text/css" href="/stylesheets/bootstrap.min.css" />
<link rel="stylesheet" type="text/css" href="/stylesheets/signin.css" />
</head>
<body>
<div id="container" class="container">
<% if (locals.success) { %>
<div id="alt_sucess" class="alert alert-success">
<%- success %>
</div>
<% } %>
<% if (locals.error) { %>
<div id="alt_warning" class="alert alert-warning">
<%= error %>
</div>
<% } %>
<form class="form-signin" role="form" method="post">
<h2 class="form-signin-heading">注册</h2>
<input id="txtUserName" name="txtUserName" type="text" class="form-control" placeholder="用户名" required autofocus />
<input id="txtUserPwd" name="txtUserPwd" type="password" class="form-control" placeholder="密码" required/>
<input id="txtUserRePwd" name="txtUserRePwd" type="password" class="form-control" placeholder="重复密码" required/>
<button id="btnSub" class="btn btn-lg btn-primary" type="submit">注 册</button>
<a class="btn btn-link" href="/login" role="button">登 录</a>
</form>
</div>
</body>
</html>
<script src="/javascripts/jquery-1.11.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
String.prototype.format = function (args) {
var result = this;
if (arguments.length > 0) {
if (arguments.length == 1 && typeof (args) == "object") {
for (var key in args) {
if (args[key] != undefined) {
var reg = new RegExp("({" + key + "})", "g");
result = result.replace(reg, args[key]);
}
}
}
else {
for (var i = 0; i < arguments.length; i++) {
if (arguments[i] != undefined) {
var reg = new RegExp("({)" + i + "(})", "g");
result = result.replace(reg, arguments[i]);
}
}
}
}
return result;
}
$(function(){
$('#btnSub').on('click',function(){
var
$txtUserName = $('#txtUserName'),
txtUserNameVal = $.trim($txtUserName.val()),
$txtUserPwd = $('#txtUserPwd'),
txtUserPwdVal = $.trim($txtUserPwd.val()),
$txtUserRePwd = $('#txtUserRePwd'),
txtUserRePwdVal = $.trim($txtUserRePwd.val()),
errorTip = '<div id="errorTip" class="alert alert-warning">{0}</div> ';
$("#errorTip,#alt_sucess,#alt_warning").remove();
if(txtUserNameVal.length == 0)
{
$("#container").prepend(errorTip.format('用户名不能为空'));
$txtUserName.focus();
return false;
}
if(txtUserPwdVal.length == 0)
{
$("#container").prepend(errorTip.format('密码不能为空'));
$txtUserPwd.focus();
return false;
}
if(txtUserRePwdVal.length == 0)
{
$("#container").prepend(errorTip.format('重复密码不能为空'));
$txtUserRePwd.focus();
return false;
}
if(txtUserPwdVal != txtUserRePwdVal)
{
$("#container").prepend(errorTip.format('两次密码不一致'));
$txtUserPwd.focus();
return false;
}
return true;
})
});
</script>2.实现注册功能（reg.js）
var express = require('express'),
router = express.Router(),
User = require('../models/user.js'),
crypto = require('crypto'),
TITLE_REG = '注册';
router.get('/', function(req, res) {
res.render('reg',{title:TITLE_REG});
});
router.post('/', function(req, res) {
var userName = req.body['txtUserName'],
userPwd = req.body['txtUserPwd'],
userRePwd = req.body['txtUserRePwd'],
md5 = crypto.createHash('md5');
userPwd = md5.update(userPwd).digest('hex');
var newUser = new User({
username: userName,
userpass: userPwd
});
//检查用户名是否已经存在
User.getUserNumByName(newUser.username, function (err, results) {
if (results != null && results[0]['num'] > 0) {
err = '用户名已存在';
}
if (err) {
res.locals.error = err;
res.render('reg', { title: TITLE_REG });
return;
}
newUser.save(function (err,result) {
if (err) {
res.locals.error = err;
res.render('reg', { title: TITLE_REG });
return;
}
if(result.insertId > 0)
{
res.locals.success = '注册成功,请点击 <a class="btn btn-link" href="/login" role="button"> 登录 </a>' ;
}
else
{
res.locals.error = err;
}
res.render('reg', { title: TITLE_REG });
});
});
});
module.exports = router;
效果图如上 至此 注册就完成了