Spring MVC- several parts/views from a controller

<jsp:include page="header.jsp"/>
<!-- login_form specific page content goes here -->

<jsp:include page="footer.jsp"/>

<select id="attr1" name="attr1">
    <option value="1">A</option>
    <option value="2">B</option>
</select>

@RequestMapping(value = "/aaa", method = RequestMethod.POST)
public ModelAndView methodName(@RequestParam(value = "attr1") int attribute) {
    if (attribute == 1) {
        return new ModelAndView("view1");
    }
    else if (attribute == 2) {
        return new ModelAndView("view2");
    }
    else {
        return null; // Empty 200 OK just to be sure if other attr is received
    }
}

package project.eHealth;

import java.io.IOException;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;

import javafx.application.Application;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;



@SpringBootApplication
public class EHealthApplication extends Application {
    private ConfigurableApplicationContext context;
    private Parent rootNode;
    private Stage primary;

    public static void main(String[] args) {
        Application.launch(args);
    }

    @Override
    public void init() throws Exception {
        context = SpringApplication.run(EHealthApplication.class);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {

        // UI work should really be here, as it's on the FX Application Thread
        // (though I think you can get away with it in the init() method)
        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("Main.fxml"));
        fxmlLoader.setControllerFactory(context::getBean);
        rootNode = fxmlLoader.load();
        this.primary = primaryStage;
        primaryStage.setScene(new Scene(rootNode));
        primaryStage.setTitle("E-Health Login");
        primaryStage.show();


    }

    @Override
    public void stop() throws Exception {
        context.close();
    }



}

pacakge project.eHealth ;

// imports omitted...

@Component
public class MainController {

    @Autowired
    private ApplicationContext context ;

    private Stage doctorStage;

    @FXML
    void showDoctorFrame() throws IOException{
        System.out.println("Handle regular User");
        FXMLLoader loader = new FXMLLoader();
        loader.setLocation(EHealthApplication.class.getResource("DoctorView.fxml"));
        loader.setControllerFactory(context::getBean);
        Parent rootNode = loader.load();

        doctorStage = new Stage();
        doctorStage.setTitle("PatientView");
        Scene scene = new Scene(rootNode);
        doctorStage.setScene(scene);
        doctorStage.show();
    }

}