基本满足要求，可能有一丢丢副作用.

var app = angular.module('myApp', []); app.factory('User', function($q, $timeout){ var userInfo, loading, deferred = $q.defer(), promise = deferred.promise; return { getUserInfo: function(){ if(!loading){ loading = true; // 模拟http请求 console.log('发起请求...') $timeout(function(){ userInfo = { name: 'Angularjs', version: '1.x' }; deferred.resolve(userInfo); }, 100); return promise; }else if( userInfo ){ console.log('这是缓存的信息'); return $q.resolve(userInfo); }else{ console.log('正在等待请求的结果...'); return promise; } } } }); app.controller('MyCtrl',function($scope, User, $timeout){ User.getUserInfo().then(function(userInfo){ console.log('run:',userInfo); $scope.name = userInfo.name; }); }); app.run(function(User){ User.getUserInfo().then(function(userInfo){ console.log('controller:',userInfo); }); })