angularJs在多个控制器中共享服务数据的方法

<div ng-app="module"> <div ng-controller="ctrl1">  <table border="1" width="600">   <tr>    <td>网站名称</td>    <td>网址</td>   </tr>   <tr ng-repeat="v in data.webs">    <td>{{v.name}}</td>    <td>{{v.url}}</td>   </tr>  </table> </div> <hr> <div ng-controller="ctrl2">  <table border="1" width="600">   <tr>    <td>网站名称</td>    <td>网址</td>   </tr>   <tr ng-repeat="v in data.webs">    <td>{{v.name}}</td>    <td>{{v.url}}</td>   </tr>  </table>  <h1>{{web.name}}</h1>  <button ng-click="removeAll()">删除所有数据</button> </div></div><script> var m = angular.module('module', []); //定义服务 m.factory('videoServer', ['$http', function ($http) {  var obj = {   data: {webs:[]},   //所有数据   all: function () {    return $http({url: '1.php'}).then(function (response) {     obj.data.webs = response.data;     return obj.data;    });   },   //获取一条数据   find: function (id) {    return this.all().then(function (data) {     for (var i = 0; i < data.length; i++) {      if (data[i].id == id) {       return data[i];      }     }    });   },   //删除所有数据   flush: function () {    obj.data.webs=[];   }  };  return obj; }]); //控制器ctrl1 m.controller('ctrl1', ['$scope', 'videoServer', function ($scope, videoServer) {  videoServer.all().then(function (data) {   $scope.data = data;  }); }]);  //控制器ctrl2 m.controller('ctrl2', ['$scope', 'videoServer', function ($scope, videoServer) {  videoServer.all().then(function (data) {   $scope.data = data;  });  videoServer.find(1).then(function (data) {   $scope.web = data;  })  $scope.removeAll=function(){   videoServer.flush();  } }]);</script>

<?php$data = [ [ 'name' => '百度', 'url' => 'www.baidu.com' ], [ 'name' => '谷歌', 'url' => 'google.com' ],];echo json_encode($data,JSON_UNESCAPED_UNICODE);