/**
* 实例化controller
* @param class $router 路由
* @return void
*/
public static function dispatch($router)
{
//得到的controller类似: App\Controller\BaseController，而不是: Base
$controller = $router->getController();
$action = $router->getAction();
$params = $router->getParams();
$controllerfile = str_replace('\\', '/', $controller) . '.class.php';
if (file_exists($controllerfile)) {
require_once $controllerfile;
$app = new $controller();
$app->setParams($params);
$app->{$action}();
} else {
throw new \Exception("找不到controller，请检查{$controllerfile}是否存在");
}
}
