欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识！
您现在的位置是： 首页

AngularJS学习笔记（3）——通过Ajax获取JSON数据

程序员文章站 2024-03-16 18:54:22
...

通过Ajax获取JSON数据

以我之前写的与用户交互的动态清单列表为例，使用JSON前todo.html代码如下：

<!DOCTYPE html>
<html ng-app="todoApp">
<head>
    <meta charset="UTF-8">
    <title>TO DO List</title>
    <link href="./bootstrap/css/bootstrap.css" rel="stylesheet"/>
    <link href="./bootstrap/css/bootstrap-theme.css" rel="stylesheet"/>
    <script src="./angularJs/angular.js"></script>
    <script>

        var model = {
            user:"Yimi",
            items:[{action:"练车",done:true},
                {action:"看课外书",done:false}]
        };

        var todoApp = angular.module("todoApp",[]);

        todoApp.controller("ToDoCtrl",function($scope){ //以$开头的变量名表示AngularJS的内置特性
            $scope.todo = model;

            $scope.incompleteCount = function(){
                var count = 0;
                angular.forEach($scope.todo.items,function(item){
                    if(!item.done){count++;}
                });
                return count;
            }

            $scope.warningLevel = function(){
                return $scope.incompleteCount() < 2 ? "label-success" : "label-warning";
            }

            $scope.addNewItem = function(actionText){
                $scope.todo.items.push({action:actionText, done:false});
            }

        });

    </script>
</head>
<body ng-controller="ToDoCtrl">
<div class="page-header">
    <h1>{{todo.user}}'s TO DO List
    <!--添加ng-hide="incompleteCount() == 0"使未办事项数为0时不显示此标签-->
    <span class="label label-default" ng-hide="incompleteCount() == 0" ng-class="warningLevel()">{{incompleteCount()}}</span></h1>
</div>
<div class="panel">
    <div class="input-group">
        <input class="form-control" ng-model="actionText"/>
        <span class="input-group-btn">
                <button class="btn btn-default" ng-click="addNewItem(actionText)">Add</button>
        </span>
    </div>
    <table class="table table-striped">
        <thead>
        <tr>
            <th>Description</th>
            <th>Done</th>
        </tr>
        </thead>
        <tbody>
        <tr ng-repeat="item in todo.items">
            <td>{{item.action}}</td>
            <td><input type="checkbox" ng-model="item.done"/></td>
            <td>{{item.done}}</td>
        </tr>
        </tbody>
    </table>
</div>
</body>
</html>

效果图如下：
AngularJS学习笔记（3）——通过Ajax获取JSON数据

现在把模型model内的items中的值单独写成一个JSON文件，再通过发起Ajax请求的方式获取JSON数据。

1.把todo.html文件内的模型model去除直接定义的items，改成如下形式：

 var model = {
            user: "admin"
        };

2.新建todo.json文件并编写如下代码：

[
  {"action": "练车","done": false},
  {"action": "看书","done": true}
]

3.发起Ajax请求的方式获取JSON数据：

......
todoApp.run(function ($http) {
            $http.get("./todo.json").success(function (data) {
                model.items = data;
                console.log("data:" ,data );
                console.log("items:" , model.items)
            });
        });
......

现在，清单列表中的数据项就都是通过JSON数据来传递的了，使用Chrome可以浏览器查看时可以按F12看到NetWork的状态，状态码为200即成功获取。可以看到todo.json的数据成功获取到了：
AngularJS学习笔记（3）——通过Ajax获取JSON数据
而且显示的页面效果与原先一致。

完整源码（css/js文件需自己额外设置）：
todo.html

<!DOCTYPE html>
<html ng-app="todoApp">
<head>
    <meta charset="UTF-8">
    <title>TO DO List</title>
    <link href="./bootstrap/css/bootstrap.css" rel="stylesheet"/>
    <link href="./bootstrap/css/bootstrap-theme.css" rel="stylesheet"/>
    <script src="./angularJs/angular.js"></script>
    <script>

        var model = {
            user: "Yimi"
        };

        var todoApp = angular.module("todoApp", []);
        todoApp.run(function ($http) {
            $http.get("./todo.json").success(function (data) {
                model.items = data;
                console.log("data:" ,data );
                console.log("items:" , model.items)
            });
        });

        todoApp.controller("ToDoCtrl", function ($scope) {
            $scope.todo = model;

            $scope.incompleteCount = function () {
                var count = 0;
                angular.forEach($scope.todo.items, function (item) {
                    if (!item.done) {
                        count++;
                    }
                });
                return count;
            }

            $scope.warningLevel = function () {
                return $scope.incompleteCount() < 2 ? "label-success" : "label-warning";
            }

            $scope.addNewItem = function (actionText) {
                $scope.todo.items.push({action: actionText, done: false});
            }

        });

    </script>
</head>
<body ng-controller="ToDoCtrl">
<div class="page-header">
    <h1>{{todo.user}}'s TO DO List
        <!--添加ng-hide="incompleteCount() == 0"使未办事项数为0时不显示此标签-->
        <span class="label label-default" ng-hide="incompleteCount() == 0" ng-class="warningLevel()">{{incompleteCount()}}</span>
    </h1>
</div>
<div class="panel">
    <div class="input-group">
        <input class="form-control" ng-model="actionText"/>
        <span class="input-group-btn">
                <button class="btn btn-default" ng-click="addNewItem(actionText)">Add</button>
        </span>
    </div>
    <table class="table table-striped">
        <thead>
        <tr>
            <th>Description</th>
            <th>Done</th>
            <th></th>
        </tr>
        </thead>
        <tbody>
        <tr ng-repeat="item in todo.items">
            <td>{{item.action}}</td>
            <td><input type="checkbox" ng-model="item.done"/></td>
            <td>{{item.done}}</td>
        </tr>
        </tbody>
    </table>
</div>
</body>
</html>

todo.json

[
  {"action": "练车","done": false},
  {"action": "看书","done": true}
]
相关标签： angularjs ajax json 清单列表

上一篇： GitHub 图片加载不出来怎么办

下一篇： 【数据库系统原理】常用sql 操作

推荐阅读