Asf_Dispatcher 负责路由分发
The framework automatically initializes the 'dispatcher' when the 'Application' is running.
在开启命名空间情况下（asf.use_namespace=1）类名为 Asf\Dispatcher
<?php
final class Asf_Dispatcher
{
public static Asf_Dispatcher getInstance(void)
public Asf_Router getRouter(void)
public Asf_Http_Request getRequest(void)
public Asf_Dispatcher setDefaultModule(string $name)
public Asf_Dispatcher setDefaultService(string $name)
public Asf_Dispatcher setDefaultAction(string $name)
}