/**
* Web Application应用入口
*
* @param string $appName
* @param string|array $config
* @return WindWebApplication
*/
public static function application($appName = '', $config = array())
{
if (self::$_front === null) {
self::$_classes['WindWebFrontController'] = 'web/WindWebFrontController';
self::$_front = new WindWebFrontController($appName, $config);
}
return self::$_front;
}