Spring. WebApplicationInitializer. Добавление сервлета. Работа с диспетчером

public class ApplicationInitializer implements WebApplicationInitializer {
 
    private final static String DISPATCHER = "dispatcher";
 
    public void onStartup(ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
        ctx.register(WebConfig.class);
        servletContext.addListener(new ContextLoaderListener(ctx));
 
        ServletRegistration.Dynamic servlet = servletContext.addServlet(DISPATCHER, new DispatcherServlet(ctx));
        servlet.addMapping("/");
        servlet.setLoadOnStartup(1);
    }
}

@RestController
public class HouseController {
@RequestMapping(value = "/{id}", method = RequestMethod.GET)
    @ResponseBody
    public House getHouse(@PathVariable("id") long houseID) {
        return service.getByID(houseID);
    }
 
  private static final int BUFFER_SIZE = 4096;
 
    /**
     * Path of the file to be downloaded, relative to application's directory
     */
 
    private String filePath = "video\\foto.png";
 
    @RequestMapping(value = "/getfoto", method = RequestMethod.GET)
    public void doDownload(HttpServletRequest request,
                           HttpServletResponse response) throws IOException {
                        ....
                        ....
                        ....
    }
 
 
}

@RestController
public class BannerController {
    private static final int BUFFER_SIZE = 4096;
 
    /**
     * Path of the file to be downloaded, relative to application's directory
     */
 
    private String filePath = "banner\\banner.jpg";
 
    /**
     *      Servlet download daily movie to client
     **/
    @RequestMapping(value = "/getfoto", method = RequestMethod.GET)
    public void doDownload(HttpServletRequest request,
                           HttpServletResponse response) throws IOException {
 
        
    }
}