43.$http

转自：https://www.cnblogs.com/best/tag/Angular/

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

使用格式：

// 简单的 GET 请求，可以改为 POST
$http({
    method: 'GET',
    url: '/someUrl'
}).then(function successCallback(response) {
        // 请求成功执行代码
    }, function errorCallback(response) {
        // 请求失败执行代码
});

简写方法

POST 与 GET 简写方法格式：

$http.get('/someUrl', config).then(successCallback, errorCallback);
$http.post('/someUrl', data, config).then(successCallback, errorCallback);

此外还有以下简写方法：

$http.get
$http.head
$http.post
$http.put
$http.delete
$http.jsonp
$http.patch

更详细内容可参见：

读取 JSON 文件

以下是存储在web服务器上的 JSON 文件：

 1 {
 2     "sites": [
 3         {
 4             "Name": "菜鸟教程",
 5             "Url": "www.runoob.com",
 6             "Country": "CN"
 7         },
 8         {
 9             "Name": "Google",
10             "Url": "www.google.com",
11             "Country": "USA"
12         },
13         {
14             "Name": "Facebook",
15             "Url": "www.facebook.com",
16             "Country": "USA"
17         },
18         {
19             "Name": "微博",
20             "Url": "www.weibo.com",
21             "Country": "CN"
22         }
23     ]
24 }

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <meta charset="utf-8">
 5 <script src="https://cdn.bootcss.com/angular.js/1.6.3/angular.min.js"></script>
 6 </head>
 7 <body>
 8 
 9 <div ng-app="myApp" ng-controller="siteCtrl"> 
10 
11 <ul>
12   <li ng-repeat="x in names">
13     {{ x.Name + ', ' + x.Country }}
14   </li>
15 </ul>
16 
17 </div>
18 
19 <script>
20 var app = angular.module('myApp', []);
21     
22 app.controller('siteCtrl', function($scope, $http) {
23     $http({
24         method: 'GET',
25         url: 'http://www.runoob.com/try/angularjs/data/sites.php'
26     }).then(function successCallback(response) {
27             $scope.names = response.data.sites;
28         }, function errorCallback(response) {
29             // 请求失败执行代码
30     });
31   
32 });
33 </script>
34 
35 </body>
36 </html>

简写方法实例

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <meta charset="utf-8">
 5 <script src="https://cdn.bootcss.com/angular.js/1.6.3/angular.min.js"></script>
 6 </head>
 7 <body>
 8 
 9 <div ng-app="myApp" ng-controller="siteCtrl"> 
10 
11 <ul>
12   <li ng-repeat="x in names">
13     {{ x.Name + ', ' + x.Country }}
14   </li>
15 </ul>
16 
17 </div>
18 
19 <script>
20 var app = angular.module('myApp', []);
21 app.controller('siteCtrl', function($scope, $http) {
22   $http.get("http://www.runoob.com/try/angularjs/data/sites.php")
23   .then(function (response) {$scope.names = response.data.sites;});
24 });
25 </script>
26 
27 </body>
28 </html>

AngularJS1.5 以下版本 - 实例

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <meta charset="utf-8">
 5 <script src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js"></script>
 6 </head>
 7 <body>
 8 
 9 <div ng-app="myApp" ng-controller="siteCtrl"> 
10 
11 <ul>
12   <li ng-repeat="x in names">
13     {{ x.Name + ', ' + x.Country }}
14   </li>
15 </ul>
16 
17 </div>
18 
19 <script>
20 var app = angular.module('myApp', []);
21 app.controller('siteCtrl', function($scope, $http) {
22   $http.get("http://www.runoob.com/try/angularjs/data/sites.php")
23   .success(function (response) {$scope.names = response.sites;});
24 });
25 </script>
26 
27 </body>
28 </html>