该代码应如下所示(我现在不知道它如何工作):
function getList()
{
// $mainframe = JFactory::getApplication('site'); // you don't need this line!
$db = JFactory::getDBO();
$query = " SELECT
*
FROM
#__ListUser
WHERE
1=1"; // just some condition to extract selected rows
$db->setQuery( $query ); // this sets the query and it's joomla, not sql.
$rows = $db->loadObjectList();
return $rows;
}