How to redirect springboot error page to vaadin error UI? - spring-boot

Question

I have an error page in vaadin UI. But sometimes we can write a wrong url and we see the springboot error page.
I want to show vaadin UI error page in this case. By the way, I have already have a rendered 404 page for springboot. But I don't want to show it.
This is my vaadin error UI. But this works into the application. (http://localhost:7001/MyApplication/#!error)
sometimes I write an invalid url like this: http://localhost:7001/MyApplication/blablablabla
in this case I want to redirect vaadin error page (http://localhost:7001/MyApplication/#!error) But the springboot redirects me to rendered 404 page.
It is possible?
#UIScope
#SpringView(name = ErrorView.VIEW_NAME)
public class ErrorView extends VerticalLayout implements View {
public static final String VIEW_NAME = "error";
private Label explanation;
public ErrorView() {
Label header = new Label("The view could not be found");
header.addStyleName(MaterialTheme.LABEL_H1);
addComponent(header);
addComponent(explanation = new Label());
}
#Override
public void enter(ViewChangeListener.ViewChangeEvent event) {
explanation.setValue(String.format("You tried to navigate to a view ('%s') that does not exist.", event.getViewName()));
getUI().getNavigator().navigateTo(ErrorView.VIEW_NAME);
}
}

Answer 1

you can put 404/500 page under resources/error/ folder, Spring boot will redirect those page automatic when have error

Answer 2

I think SpringNavigator can solve your problem. While defining your Navigator, you can also define error View. See the example below
#SpringUI(path = "ui")
public class DemoUI extends com.vaadin.ui.UI {
#Override
protected void init(VaadinRequest vaadinRequest) {
SpringNavigator navigator = new SpringNavigator();
navigator.setErrorView(new ErrorView());
setNavigator(navigator);
}
}