实现代码如下
<!DOCTYPE html>
<html ng-app="myServiceApp">
<head>
<meta charset="UTF-8">
<title>$watch实现input监听--并向后台发出HTTP请求</title>
<!--引入第三方样式库bootstrap.min.css-->
<link rel="stylesheet" href="framework/bootstrap-3.0.0/css/bootstrap.min.css" />
<link rel="stylesheet" href="css/main.css" />
<!--引入js库anglarjs-->
<script type="text/javascript" src="framework/angular-1.5.5/angular.js"></script>
<script type="text/javascript" src="js/service.js"></script>
</head>
<body>
<div class = "form-group col-sm-6 main" ng-controller="ServiceController">
<label for = "name" class="pull-left">用户名</label>
<input type = "text" class = "form-control" ng-model="userName" placeholder = "用户名"/>
<div class="pad-t-5">
<table class="table table-bordered table-hover">
<thead>
<tr>
<th>序号</th>
<th>用户名</th>
<th>年龄</th>
<th>电话号码</th>
<th>所在部门</th>
</tr>
</thead>
<tbody>
<tr ng-repeat="users in usersList">
<td>{{$index+1}}</td>
<td>{{users.userName}}</td>
<td>{{users.age}}</td>
<td>{{users.phoneNumber}}</td>
<td>{{users.department}}</td>
</tr>
</tbody>
</table>
</div>
</div>
</body>
</html>
service.js
<script type="text/javascript">
var myService = angular.module(‘myServiceApp‘,[]);
//共用的controller抽成Service
myService.factory(‘userListService‘, [‘$http‘,
function($http){
//doRequest处理请求
var doRequest = function(userName, path){
return $http({
method: ‘GET‘,
url: ‘cardInfo/users.json‘
});
}
return {
userList : function(userName){
return doRequest(userName, ‘userList‘);
}
}
}
]);
//控制器调用service
myService.controller(‘ServiceController‘, [‘$scope‘,‘$timeout‘, ‘userListService‘,
function($scope, $timeout, userListService){
//监听数据模型ng-model
var timeout;
$scope.$watch(‘userName‘, function(newUserName){
if(newUserName){
if(timeout){
$timeout.cancel();
}
}
timeout = $timeout(function(){
userListService.userList(newUserName).success(function(data, status){
$scope.usersList = data;
})
},350)
});
}
]);
</script>
Angular中$watch实现控件改变后实时发送HTTP请求
原文：http://www.cnblogs.com/zjf-1992/p/6481506.html