本人已解决问题:

如果您的组件只有一个菜单项(否则您必须选择正确的菜单项)，则只需将以下行添加到代码中即可:

In the case that you have only one menu item for your component (else you have to pick the right one) you just have to add these lines to your code:

$app = JFactory::getApplication();
$menu = $app->getMenu();
$items = $menu->getItems('component', 'com_games');

if (!isset($query['Itemid']))   
    $query['Itemid'] =  $items->id; 

现在，joomla将使用菜单项别名来生成sef url.

Now joomla takes the menu item alias for generating the sef urls.