AngularJS学习笔记（3）——通过Ajax获取JSON数据_H5之家

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"/> <link href="./bootstrap/css/bootstrap-theme.css"/> <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> <h1>{{todo.user}}'s TO DO List  <span ng-hide="incompleteCount() == 0" ng-class="warningLevel()">{{incompleteCount()}}</span></h1> </div> <div> <div> <input ng-model="actionText"/> <span> <button ng-click="addNewItem(actionText)">Add</button> </span> </div> <table> <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"/> <link href="./bootstrap/css/bootstrap-theme.css"/> <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> <h1>{{todo.user}}'s TO DO List  <span ng-hide="incompleteCount() == 0" ng-class="warningLevel()">{{incompleteCount()}}</span> </h1> </div> <div> <div> <input ng-model="actionText"/> <span> <button ng-click="addNewItem(actionText)">Add</button> </span> </div> <table> <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} ]