Add SpringContextLoaderListener(WebApplicationContext context) constructor

Server server = new Server(8080);
ServletContextHandler contextHandler = new  ServletContextHandler(ServletContextHandler.SESSIONS);
AnnotationConfigWebApplicationContext rootContext = new AnnotationConfigWebApplicationContext();
rootContext.register(AppConfig.class);
contextHandler.addEventListener(new ResteasyBootstrap());
contextHandler.addEventListener(new SpringContextLoaderListener(rootContext));
contextHandler.addServlet(HttpServletDispatcher.class, "/*");
server.setHandler(contextHandler);
server.start();
server.join();