AngularJS XMLHttpRequest
$http 是 AngularJS 中的一個核心服務，用于讀取遠程服務器的數(shù)據(jù)。
讀取 JSON 文件
以下是存儲在web服務器上的 JSON 文件：
Customers_JSON.php
[
{
"Name" : "Alfreds Futterkiste",
"City" : "Berlin",
"Country" : "Germany"
},
{
"Name" : "Berglunds snabbk?p",
"City" : "Lule?",
"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" : "K?niglich 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" : "K?benhavn",
"Country" : "Denmark"
},
{
"Name" : "The Big Cheese",
"City" : "Portland",
"Country" : "USA"
},
{
"Name" : "Vaffeljernet",
"City" : "?rhus",
"Country" : "Denmark"
},
{
"Name" : "Wolski Zajazd",
"City" : "Warszawa",
"Country" : "Poland"
}
]
AngularJS $http
AngularJS $http 是一個用于讀取web服務器上數(shù)據(jù)的服務。
$http.get(url) 是用于讀取服務器數(shù)據(jù)的函數(shù)。
AngularJS 實例
<div ng-app="" ng-controller="customersController">
<ul>
<li ng-repeat="x in names">
{{ x.Name + ', ' + x.Country }}
</li>
</ul>
</div>
<script>
function customersController($scope,$http) {
$http.get("/statics/demosource/Customers_JSON.php")
.success(function(response) {$scope.names = response;});
}
</script>
應用解析:
AngularJS 應用通過 ng-app 定義。應用在 <div> 中執(zhí)行。
ng-controller 指令設置了 controller 對象 名。
函數(shù) customersController 是一個標準的 JavaScript 對象構造器。
控制器對象有一個屬性: $scope.names。
$http.get() 從web服務器上讀取靜態(tài) JSON 數(shù)據(jù)。
服務器數(shù)據(jù)文件為： /statics/demosource/Customers_JSON.php。
當從服務端載入 JSON 數(shù)據(jù)時，$scope.names 變?yōu)橐粋€數(shù)組。
 | 以上代碼也可以用于讀取數(shù)據(jù)庫數(shù)據(jù)。 |
