前端MVC学习笔记（四）——NodeJS+MongoDB+AngularJS+Bootstrap书店示例

这章的目的是为了把前面所学习的内容整合一下，这个示例完成一个简单图书管理模块，因为中间需要使用到Bootstrap这里先介绍Bootstrap。

示例名称：天狗书店

功能：完成前后端分离的图书管理功能，总结前端学习过的内容。

技术：NodeJS、Express、Monk、MongoDB、AngularJS、BootStrap、跨域

效果：

一、Bootstrap

Bootstrap是一个UI框架，它支持响应式布局，在PC端与移动端都表现不错。

Bootstrap是Twitter推出的一款简洁、直观、强悍的前端开发框架。

Bootstrap中包含了丰富的Web组件，根据这些组件，可以快速的搭建一个漂亮、功能完备的网站。

在线可视布局：http://www.ibootstrap.cn/

演示： http://expo.bootcss.com/

中文网：http://www.bootcss.com/

官网：http://getbootstrap.com/

安装：npm install bootstrap@3

1.1、添加引用

也可使用包管理器也可以去官网下载后添加引用。

1.2、在页面中使用BootStrap

添加CSS引用：

<link rel="stylesheet" type="text/css" href="js/bootstrap/dist/css/bootstrap.min.css" />

添加JavaScript引用：

 <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>

<script src="js/bootstrap/dist/js/bootstrap.min.js" type="text/javascript" charset="utf-8"></script>

在页面中引用BootStrap定义好的样式

<!DOCTYPE html>
<html>

    <head>
        <meta charset="UTF-8">
        <title>bootstrap</title>
        <link rel="stylesheet" type="text/css" href="js/bootstrap/dist/css/bootstrap.min.css" />
    </head>

    <body>
        <div class="container-fluid">
            <div class="row">
                <div class="jumbotron">
                    <h1>Hello, world!</h1>
                    <p>This is a simple hero unit, a simple jumbotron-style component for calling extra attention to featured content or information</p>
                    <p>
                        <a class="btn btn-primary btn-lg" href="#" role="button">Learn more</a>
                    </p>
                </div>
            </div>
            <div class="row">
                <div class="col-md-6">
                    <button type="button" class="btn btn-default">默认</button>

                    <button type="button" class="btn btn-primary">主要</button>

                    <button type="button" class="btn btn-success">成功</button>

                    <button type="button" class="btn btn-info">信息</button>

                    <button type="button" class="btn btn-warning">警告</button>

                    <button type="button" class="btn btn-danger">错误</button>

                    <button type="button" class="btn btn-link">链接</button>
                </div>
                <div class="col-md-6">
                    <button type="button" class="btn btn-default btn-lg">默认</button>
                    <button type="button" class="btn btn-default">默认</button>
                    <button type="button" class="btn btn-default btn-sm">默认</button>
                    <button type="button" class="btn btn-default btn-xs">默认</button>
                </div>
            </div>
        </div>
        <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
        <script src="js/bootstrap/dist/js/bootstrap.min.js" type="text/javascript" charset="utf-8"></script>
    </body>

</html>

运行结果：

1.3、可视化布局

如果想快速高效的布局可以使用一些在线辅助工具，如：

http://www.ibootstrap.cn/

点击下载可以获得生成的HTML脚本。

二、使用MongoDB创建数据库

2.1、启动MongoDB数据库

数据库的具体安装、配置在前面的章节中已经讲解过，可以参考。

如果服务与配置都没有完成的话可以启动：C:\Program Files\MongoDB\Server\3.4\bin\mongod.exe

2.2、启动数据库GUI管理工具

2.3、创建数据库与集合

在localhost上右键“create database”创建名称为BookStore的数据库。

创建一个用于存放图书的集合名称为books。

在集合中添加5本图书。

db.getCollection('books').insert({id:201701,title:"使用AlarJS开发下一代应用程序",picture:"b1.jpg",price:55.0,author:"brad green"});

三、创建一个Express项目

这里使用Eclipse（HBuilder）为开发工具，添加Nodeclipse插件，新增一个Express项目：

3.1、创建app.js

/**
 * Module dependencies.
 */

var express = require('express')
  , routes = require('./routes')
  , books = require('./routes/books')
  , http = require('http')
  , path = require('path');

var app = express();

// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));

// development only
if ('development' == app.get('env')) {
  app.use(express.errorHandler());
}

app.get('/', books.list);
app.get('/books', books.list);

http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});

四、Monk访问MongoDB数据库

monk是NodeJS平台下访问MongoDB数据库的一个模块。monk访问MongoDB更加方便比NodeJS直接访问。

git仓库地址：https://github.com/Automattic/monk

文档：https://automattic.github.io/monk/

安装：npm install --save monk

4.1、创建连接

const monk = require('monk')

// Connection URL
const url = 'localhost:27017/myproject';

const db = monk(url);

db.then(() => {
  console.log('Connected correctly to server')
})

4.2、插入数据

const url = 'localhost:27017/myproject'; // Connection URL
const db = require('monk')(url);

const collection = db.get('document')

collection.insert([{a: 1}, {a: 2}, {a: 3}])
  .then((docs) => {
    // docs contains the documents inserted with added **_id** fields
    // Inserted 3 documents into the document collection
  }).catch((err) => {
    // An error happened while inserting
  }).then(() => db.close())

users.insert({ woot: 'foo' })
users.insert([{ woot: 'bar' }, { woot: 'baz' }])

4.3、更新数据

const url = 'localhost:27017/myproject'; // Connection URL
const db = require('monk')(url);

const collection = db.get('document')

collection.insert([{a: 1}, {a: 2}, {a: 3}])
  .then((docs) => {
    // Inserted 3 documents into the document collection
  })
  .then(() => {

    return collection.update({ a: 2 }, { $set: { b: 1 } })

  })
  .then((result) => {
    // Updated the document with the field a equal to 2
  })
  .then(() => db.close())

users.update({name: 'foo'}, {name: 'bar'})

4.4、删除数据

const url = 'localhost:27017/myproject'; // Connection URL
const db = require('monk')(url);

const collection = db.get('document')

collection.insert([{a: 1}, {a: 2}, {a: 3}])
  .then((docs) => {
    // Inserted 3 documents into the document collection
  })
  .then(() => collection.update({ a: 2 }, { $set: { b: 1 } }))
  .then((result) => {
    // Updated the document with the field a equal to 2
  })
  .then(() => {

    return collection.remove({ a: 3})

  }).then((result) => {
    // Deleted the document with the field a equal to 3
  })
  .then(() => db.close())

users.remove({ woot: 'foo' })

4.5、查找数据

const url = 'localhost:27017/myproject'; // Connection URL
const db = require('monk')(url);

const collection = db.get('document')

collection.insert([{a: 1}, {a: 2}, {a: 3}])
  .then((docs) => {
    // Inserted 3 documents into the document collection
  })
  .then(() => collection.update({ a: 2 }, { $set: { b: 1 } }))
  .then((result) => {
    // Updated the document with the field a equal to 2
  })
  .then(() => collection.remove({ a: 3}))
  .then((result) => {
    // Deleted the document with the field a equal to 3
  })
  .then(() => {

    return collection.find()

  })
  .then((docs) => {
    // docs === [{ a: 1 }, { a: 2, b: 1 }]
  })
  .then(() => db.close())

users.find({}).then((docs) => {})
users.find({}, 'name').then((docs) => {
  // only the name field will be selected
})
users.find({}, { fields: { name: 1 } }) // equivalent

users.find({}, '-name').then((docs) => {
  // all the fields except the name field will be selected
})
users.find({}, { fields: { name: 0 } }) // equivalent
users.find({}, { rawCursor: true }).then((cursor) => {
  // raw mongo cursor
})
users.find({}).each((user, {close, pause, resume}) => {
  // the users are streaming here
  // call `close()` to stop the stream
}).then(() => {
  // stream is over
})

//创建的数据库
var monk = require('monk')
var db = monk('localhost:27017/bookstore')

//读取数据：
var monk = require('monk')
var db = monk('localhost:27017/monk-demo')
 
var books = db.get('books')
  books.find({}, function(err, docs) {
   console.log(docs)
})

//插入数据：
books.insert({"name":"orange book","description":"just so so"})

//查找数据：
books.find({"name":"apple book"}, function(err, docs) {
  console.log(docs)
})

五、创建Rest后台服务

在routes目录下增加的books.js文件内容如下：

/*
 * 使用monk访问mongodb
 * 以rest的方式向前台提供服务
 */

//依赖monk模块
var monk = require('monk');
//连接并打开数据库
var db = monk('localhost:27017/BookStore');
//从数据库中获得books集合，类似表，并非所有数据， key
var books = db.get('books');

//列出所有的图书json
exports.list = function(req, res) {
    //无条件查找所有的图书，then是当查找完成时回调的异步方法
    books.find({}).then((docs) => {
        //返回json给客户端
        res.json(docs);
    }).then(() => db.close());   //关闭数据库
};

//获得最大id
exports.getMax=function(req,res){
    //找一个，根据id降序排序，
    books.findOne({}, {sort: {id: -1}}).then((bookObj)=>{
        res.json(bookObj);
    }).then(() => db.close());;
}

//添加图书
exports.add = function(req, res) {
    //先找到最大的图书编号
    books.findOne({}, {sort: {id: -1}}).then((obj)=>{
        //从客户端发送到服务器的图书对象
        var book=req.body;
        //设置图书编号为最大的图书编号+1
        book.id=(parseInt(obj.id)+1)+"";
        //执行添加
        books.insert(book).then((docs) => {
        //返回添加成功的对象
         res.json(docs);
       }).then(() => db.close());
    });
};

//删除图书
exports.del = function(req, res) {
    //从路径中取参数id,/:id
    var id=req.params.id;
    //移除编号为id的图书
    books.remove({"id":id}).then((obj)=>{
        //返回移除结果
        res.json(obj);
    }).then(() => db.close());
};

//更新
exports.update = function(req, res) {
    //获得提交给服务器的json对象
    var book=req.body;
    //执行更新,第1个参数是要更新的图书查找条件，第2个参数是要更新的对象
    books.update({"id":book.id}, book).then((obj)=>{
        //返回更新完成后的对象
        res.json(obj);
       }).then(() => db.close());
};

为了完成跨域请求，修改http头部信息及路径映射，app.js文件如下：

var express = require('express'),
    routes = require('./routes'),
    books = require('./routes/books'),
    http = require('http'),
    path = require('path');

var app = express();

// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
app.all('*', function(req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "content-type");
    res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
    res.header("X-Powered-By", ' 3.2.1')
    res.header("Content-Type", "application/json;charset=utf-8");
    if(req.method == "OPTIONS") {
        res.send("200");
    } else {
        next();
    }
});

// development only
if('development' == app.get('env')) {
    app.use(express.errorHandler());
}

app.get('/', books.list);
//获得所有的图书列表
app.get('/books', books.list);
//最大的编号
app.get('/books/maxid', books.getMax);
//添加
app.post('/books/book', books.add);
//删除
app.delete('/books/id/:id', books.del);
//更新
app.put('/books/book', books.update);

http.createServer(app).listen(app.get('port'), function() {
    console.log('Express server listening on port ' + app.get('port'));
});

查询所有：

其它服务的测试可以使用Fiddler完成。

六、使用AngularJS调用后台服务

这里的UI使用BootStrap完成，前端使用AngularJS调用NodeJS发布的服务，将数据存放在MongoDB中。

index.js页面如下：

<!DOCTYPE html>
<html>

    <head>
        <meta charset="UTF-8">
        <title>天狗书店</title>
        <link rel="shortcut icon" href="favicon.ico" />
        <link rel="bookmark" href="favicon.ico" />
        <link rel="stylesheet" type="text/css" href="js/bootstrap/dist/css/bootstrap.min.css" />
        <style type="text/css">
            .cover {
                height: 40px;
                width: auto;
            }
            
            .addBook {
                padding-top: 10px;
            }
            
            .w100 {
                width: 50px
            }
            
            .w200 {
                width: 200px;
            }
            
            .w300 {
                width: 300px
            }
        </style>
    </head>

    <body ng-app="bookApp">

        <div class="container" ng-controller="BookController">
            <div class="row clearfix">
                <div class="col-md-12 column">
                    <nav class="navbar navbar-default" role="navigation">
                        <div class="navbar-header">
                            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> <span class="sr-only">Toggle navigation</span><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></button>
                            <a class="navbar-brand" href="#">天狗书店</a>
                        </div>

                        <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
                            <ul class="nav navbar-nav">
                                <li class="active">
                                    <a href="#">前端</a>
                                </li>
                                <li>
                                    <a href="#">Java</a>
                                </li>
                                <li>
                                    <a href="#">.Net</a>
                                </li>
                                <li class="dropdown">
                                    <a href="#" class="dropdown-toggle" data-toggle="dropdown">更多类型<strong class="caret"></strong></a>
                                    <ul class="dropdown-menu">
                                        <li>
                                            <a href="#">Action</a>
                                        </li>
                                        <li>
                                            <a href="#">Another action</a>
                                        </li>
                                        <li>
                                            <a href="#">Something else here</a>
                                        </li>
                                        <li class="divider">
                                        </li>
                                        <li>
                                            <a href="#">Separated link</a>
                                        </li>
                                        <li class="divider">
                                        </li>
                                        <li>
                                            <a href="#">One more separated link</a>
                                        </li>
                                    </ul>
                                </li>
                            </ul>
                            <form class="navbar-form navbar-left" role="search">
                                <div class="form-group">
                                    <input type="text" class="form-control" />
                                </div> <button type="submit" class="btn btn-default">搜索</button>
                            </form>
                        </div>
                    </nav>
                    <div class="row clearfix">
                        <div class="col-md-12 column">
                            <div class="carousel slide" id="carousel-519027">
                                <ol class="carousel-indicators">
                                    <li class="active" data-slide-to="0" data-target="#carousel-519027">
                                    </li>
                                    <li data-slide-to="1" data-target="#carousel-519027">
                                    </li>
                                    <li data-slide-to="2" data-target="#carousel-519027">
                                    </li>
                                </ol>
                                <div class="carousel-inner">
                                    <div class="item active">
                                        <img alt="" src="img/adv3.jpg" />
                                        <div class="carousel-caption">

                                        </div>
                                    </div>
                                    <div class="item">
                                        <img alt="" src="img/adv2.jpg" />
                                        <div class="carousel-caption">
                                        </div>
                                    </div>
                                    <div class="item">
                                        <img alt="" src="img/adv1.jpg" />
                                        <div class="carousel-caption">
                                            <h4>
                                        Third Thumbnail label
                                    </h4>
                                            <p>
                                                Cras justo odio, dapibus ac facilisis in, egestas eget quam. Donec id elit non mi porta gravida at eget metus. Nullam id dolor id nibh ultricies vehicula ut id elit.
                                            </p>
                                        </div>
                                    </div>
                                </div>
                                <a class="left carousel-control" href="#carousel-519027" data-slide="prev"><span class="glyphicon glyphicon-chevron-left"></span></a>
                                <a class="right carousel-control" href="#carousel-519027" data-slide="next"><span class="glyphicon glyphicon-chevron-right"></span></a>
                            </div>
                        </div>
                    </div>

                </div>
            </div>

            <div class="row clearfix">
                <div class="col-md-12 column">
                    <div class="addBook">
                        <a id="modal-234446" href="#modal-container-234446" role="button" class="btn btn-sm btn-primary" data-toggle="modal"><span class="glyphicon glyphicon-plus"></span> 新书上架</a>

                        <div class="modal fade" id="modal-container-234446" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
                            <div class="modal-dialog">
                                <div class="modal-content">
                                    <div class="modal-header">
                                        <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
                                        <h4 class="modal-title" id="myModalLabel">
                                添加/编辑图书
                            </h4>
                                    </div>
                                    <div class="modal-body">

                                        <form class="form-horizontal" role="form">
                                            <div class="form-group">
                                                <label for="id" class="col-sm-2 control-label">编号</label>
                                                <div class="col-sm-10">
                                                    <input type="text" class="form-control w100" id="id" ng-model="book.id" ng-readonly="true" />
                                                </div>
                                            </div>

                                            <div class="form-group">
                                                <label for="title" class="col-sm-2 control-label">书名</label>
                                                <div class="col-sm-10">
                                                    <input type="text" class="form-control w300" id="title" ng-model="book.title" />
                                                </div>
                                            </div>

                                            <div class="form-group">
                                                <label for="picture" class="col-sm-2 control-label">图片</label>
                                                <div class="col-sm-10">
                                                    <input type="text" class="form-control w200" id="picture" ng-model="book.picture" />
                                                </div>
                                            </div>

                                            <div class="form-group">
                                                <label for="price" class="col-sm-2 control-label">价格</label>
                                                <div class="col-sm-10">
                                                    <input type="text" class="form-control w200" id="price" ng-model="book.price" />
                                                </div>
                                            </div>

                                            <div class="form-group">
                                                <label for="author" class="col-sm-2 control-label">作者</label>
                                                <div class="col-sm-10">
                                                    <input type="text" class="form-control w200" id="author" ng-model="book.author" />
                                                </div>
                                            </div>

                                        </form>

                                    </div>
                                    <div class="modal-footer">
                                        <button type="button" ng-click="save()" class="btn btn-primary">
                                        <span class="glyphicon glyphicon-floppy-disk"></span> 
                                            保存</button>
                                        <button type="button" class="btn btn-success" ng-click="clear()" data-dismiss="modal">
                                            <span class="glyphicon glyphicon-refresh"></span> 
                                            清空</button>
                                        <button type="button" class="btn btn-danger" data-dismiss="modal">
                                            <span class="glyphicon glyphicon-remove"></span> 
                                            关闭</button>
                                    </div>
                                </div>

                            </div>

                        </div>

                    </div>
                    <table class="table">
                        <thead>
                            <tr>
                                <th>
                                    序号
                                </th>
                                <th>
                                    编号
                                </th>
                                <th>
                                    书名
                                </th>
                                <th>
                                    图片
                                </th>
                                <th>
                                    价格
                                </th>
                                <th>
                                    作者
                                </th>
                                <th>
                                    操作
                                </th>
                            </tr>
                        </thead>
                        <tbody>
                            <tr ng-repeat="b in books" ng-class="{'info':$odd}">
                                <td>
                                    {{$index+1}}
                                </td>
                                <td>
                                    {{b.id}}
                                </td>
                                <td>
                                    {{b.title}}
                                </td>
                                <td>
                                    <img ng-src="img/{{b.picture}}" class="cover" />
                                </td>
                                <td>
                                    {{b.price | number:1}}
                                </td>
                                <td>
                                    {{b.author}}
                                </td>
                                <td>
                                    <button type="button" class="btn btn-danger btn-xs" ng-click="del(b.id,$index)">删除</button>
                                    <button href="#modal-container-234446" role="button" class="btn btn-xs btn-primary" data-toggle="modal" ng-click="edit(b)">编辑</button>
                                </td>
                            </tr>
                        </tbody>
                    </table>
                </div>
            </div>
        </div>

        <!--引入angularjs框架-->
        <script src="js/angular146/angular.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="js/jQuery1.11.3/jquery-1.11.3.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="js/bootstrap/dist/js/bootstrap.min.js" type="text/javascript" charset="utf-8"></script>
        <script type="text/javascript">
            //定义模块，指定依赖项为空
            var bookApp = angular.module("bookApp", []);

            //定义控制器，指定控制器的名称，$scope是全局对象
            bookApp.controller("BookController", ['$scope', '$http', function($scope, $http) {
                $scope.books = [];
                $scope.save = function() {
                    $http({
                            url: "http://127.0.0.1:3000/books/book",
                            data: $scope.book,
                            method: $scope.book.id ? "PUT" : "POST"
                        })
                        .success(function(data, status, headers, config) {
                            if($scope.book.id) {
                                alert("修改成功");
                            } else {
                                $scope.books.push(data);
                            }
                        })
                        .error(function(data, status, headers, config) {
                            alert(status);
                        });
                }

                $scope.edit = function(b) {
                    $scope.book = b;
                }
                $scope.clear = function() {
                    $scope.book = {};
                }

                //初始化加载
                $http.get("http://127.0.0.1:3000/")
                    .success(function(data, status, headers, config) {
                        $scope.books = data;
                    })
                    .error(function(data, status, headers, config) {
                        alert(status);
                    });

                $scope.del = function(id, index) {
                    $http.delete("http://127.0.0.1:3000/books/id/" + id)
                        .success(function(data, status, headers, config) {
                            $scope.books.splice(index, 1);
                        })
                        .error(function(data, status, headers, config) {
                            alert(status);
                        });
                }
            }]);
        </script>
    </body>

</html>