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[Java教程]AngularJS XMLHttpRequest


$http 是 AngularJS 中的一个核心服务,用于读取远程服务器的数据。

读取 JSON 文件

下是存储在web服务器上的 JSON 文件:

{  "records": [    {      "Name": "Alfreds Futterkiste",      "City": "Berlin",      "Country": "Germany"    },    {      "Name": "Ana Trujillo Emparedados y helados",      "City": "Mxico D.F.",      "Country": "Mexico"    },    {      "Name": "Antonio Moreno Taquera",      "City": "Mxico D.F.",      "Country": "Mexico"    },    {      "Name": "Around the Horn",      "City": "London",      "Country": "UK"    },    {      "Name": "B's Beverages",      "City": "London",      "Country": "UK"    },    {      "Name": "Berglunds snabbk枚p",      "City": "Lule",      "Country": "Sweden"    },    {      "Name": "Blauer See Delikatessen",      "City": "Mannheim",      "Country": "Germany"    },    {      "Name": "Blondel pre et fils",      "City": "Strasbourg",      "Country": "France"    },    {      "Name": "Blido Comidas preparadas",      "City": "Madrid",      "Country": "Spain"    },    {      "Name": "Bon app'",      "City": "Marseille",      "Country": "France"    },    {      "Name": "Bottom-Dollar Marketse",      "City": "Tsawassen",      "Country": "Canada"    },    {      "Name": "Cactus Comidas para llevar",      "City": "Buenos Aires",      "Country": "Argentina"    },    {      "Name": "Centro comercial Moctezuma",      "City": "Mxico D.F.",      "Country": "Mexico"    },    {      "Name": "Chop-suey Chinese",      "City": "Bern",      "Country": "Switzerland"    },    {      "Name": "Comrcio Mineiro",      "City": "So Paulo",      "Country": "Brazil"    }  ]}

 

AngularJS $http

AngularJS $http 是一个用于读取web服务器上数据的服务。

$http.get(url) 是用于读取服务器数据的函数。

<div ng-app="myApp" ng-controller="customersCtrl"> <ul> <li ng-repeat="x in names">  {{ x.Name + ', ' + x.Country }} </li></ul></div><script type="text/javascript" src="js/angular.min.js"></script><script>var app = angular.module('myApp', []);app.controller('customersCtrl', function($scope, $http) {  $http.get("js/text.json")  .success(function(response) {$scope.names = response.records;});});</script>

结果:

  • Alfreds Futterkiste, Germany
  • Ana Trujillo Emparedados y helados, Mexico
  • Antonio Moreno Taquera, Mexico
  • Around the Horn, UK
  • B's Beverages, UK
  • Berglunds snabbk枚p, Sweden
  • Blauer See Delikatessen, Germany
  • Blondel pre et fils, France
  • Blido Comidas preparadas, Spain
  • Bon app', France
  • Bottom-Dollar Marketse, Canada
  • Cactus Comidas para llevar, Argentina
  • Centro comercial Moctezuma, Mexico
  • Chop-suey Chinese, Switzerland
  • Comrcio Mineiro, Brazil   

应用解析:

AngularJS 应用通过 ng-app 定义。应用在 <div> 中执行。

ng-controller 指令设置了 controller 对象 名。

函数 customersController 是一个标准的 JavaScript 对象构造器

控制器对象有一个属性: $scope.names

$http.get() 从web服务器上读取静态 JSON 数据

服务器数据文件为:  我这儿是写了text.json。

当从服务端载入 JSON 数据时,$scope.names 变为一个数组。

 注:以上代码也可以用于读取数据库数据。

转载地址:http://www.runoob.com/angularjs/angularjs-http.html