AngularJS入门教程之 XMLHttpRequest实例讲解

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

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
</head>
<body>

<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>

</body>
</html>

运行结果:

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

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 <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:  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。

注意:以上代码也可以用于读取数据库数据。

以上就是对AngularJS XMLHttpRequest资料的整理,后续继续补充,希望能帮助有需要的朋友。