vaadin 14 :如何在菜单栏组件中添加和提供填写表单的功能

import com.vaadin.flow.component.button.Button;
import com.vaadin.flow.component.formlayout.FormLayout;
import com.vaadin.flow.component.menubar.MenuBar;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.router.Route;

@Route("")
public class MainView extends VerticalLayout {

    public MainView() {
        MenuBar menuBar = new MenuBar();
        MenuItem formMenuItem = menuBar.addItem("表单");
        
        formMenuItem.addClickListener(event -> {
            FormLayout formLayout = new FormLayout();
            TextField nameField = new TextField("姓名");
            TextField emailField = new TextField("邮箱");
            Button submitButton = new Button("提交");
            
            submitButton.addClickListener(submitEvent -> {
                // 处理表单提交事件，例如保存数据到数据库
                String name = nameField.getValue();
                String email = emailField.getValue();
                // ...
            });
            
            formLayout.add(nameField, emailField, submitButton);
            add(formLayout);
        });
        
        add(menuBar);
    }
}