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
以下是存储在web服务器上的 JSON 文件:
Customers_JSON.php
{"records":[ { "Name" : "Alfreds Futterkiste", "City" : "Berlin", "Country" : "Germany" }, { "Name" : "Berglunds snabbköp", "City" : "Luleå", "Country" : "Sweden" }, { "Name" : "Centro comercial Moctezuma", "City" : "México D.F.", "Country" : "Mexico" }, { "Name" : "Ernst Handel", "City" : "Graz", "Country" : "Austria" }, { "Name" : "FISSA Fabrica Inter. Salchichas S.A.", "City" : "Madrid", "Country" : "Spain" }, { "Name" : "Galería del gastrónomo", "City" : "Barcelona", "Country" : "Spain" }, { "Name" : "Island Trading", "City" : "Cowes", "Country" : "UK" }, { "Name" : "Königlich Essen", "City" : "Brandenburg", "Country" : "Germany" }, { "Name" : "Laughing Bacchus Wine Cellars", "City" : "Vancouver", "Country" : "Canada" }, { "Name" : "Magazzini Alimentari Riuniti", "City" : "Bergamo", "Country" : "Italy" }, { "Name" : "North/South", "City" : "London", "Country" : "UK" }, { "Name" : "Paris spécialités", "City" : "Paris", "Country" : "France" }, { "Name" : "Rattlesnake Canyon Grocery", "City" : "Albuquerque", "Country" : "USA" }, { "Name" : "Simons bistro", "City" : "København", "Country" : "Denmark" }, { "Name" : "The Big Cheese", "City" : "Portland", "Country" : "USA" }, { "Name" : "Vaffeljernet", "City" : "Århus", "Country" : "Denmark" }, { "Name" : "Wolski Zajazd", "City" : "Warszawa", "Country" : "Poland" } ]}
AngularJS $http
AngularJS $http 是一个用于读取web服务器上数据的服务。
$http.get(url) 是用于读取服务器数据的函数。
AngularJS 实例
<div ng-app="" ng-controller="customersController"> <ul> <li ng-repeat="x in names"> {{ x.Name + ', ' + x.Country }} </li> </ul> </div> <script> function customersController($scope,$http) { $http.get("/statics/demosource/Customers_JSON.php") .success(function(response) {$scope.names = response;}); } </script>尝试一下 »
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。
$http.get() 从web服务器上读取静态 JSON 数据。
服务器数据文件为: /statics/demosource/Customers_JSON.php。
当从服务端载入 JSON 数据时,$scope.names 变为一个数组。
以上代码也可以用于读取数据库数据。