AngularJS XMLHttpRequest

2016-04-24 20:13发布

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:

http://www.runoob.com/try/angularjs/data/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="myApp" ng-controller="customersCtrl"> 

<ul>
  <li ng-repeat="x in names">
    {{ x.Name + ', ' + x.Country }}
  </li>
</ul>

</div>

<script>
var app = angular.module('myApp', []);
app.controller('customersCtrl', function($scope, $http) {
    $http.get("http://www.runoob.com/try/angularjs/data/Customers_JSON.php")
    .success(function(response) {$scope.names = response.records;});
});
</script>


应用解析:

注意:以上代码的 get 请求是本站的服务器,你不能直接拷贝到你本地运行,会存在跨域问题,解决办法就是将 Customers_JSON.php 的数据拷贝到你自己的服务器上,附:PHP Ajax 跨域问题最佳解决方案

AngularJS 应用通过 ng-app 定义。应用在

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:  http://www.runoob.com/try/angularjs/data/Customers_JSON.php

当从服务端载入 JSON 数据时,$scope.names 变为一个数组。


Note以上代码也可以用于读取数据库数据。