如何在使用angularjs刷新页面后保持链接活动？

app.config(function($routeProvider) {
  $routeProvider
    .when('/home', {
      templateUrl: 'views/home.html',
      controller: 'HomeController'
    })
    .when('/about', {
      templateUrl: 'views/about.html',
      controller: 'AboutController'
    })
    .otherwise({
      redirectTo: '/home'
    });
});

<div ng-view></div>

app.controller('HomeController', function($scope) {
  // 控制器逻辑
});

app.controller('AboutController', function($scope) {
  // 控制器逻辑
});

<a ng-href="#/home">Home</a>
<a ng-href="#/about">About</a>