Как записать страницу ошибки (404) при весенней загрузке. как перенаправить на логин URL ("/ логин")

Question

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Answer: open spring boot application. go to application.properties in **src/main/resources ** following white label "enable" by default.
1.
server.error.whitelabel.enabled=false
server.error.include-stacktrace=always
write following contoller class.
2.
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import javax.servlet.http.HttpServletRequest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.web.ErrorController;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.HttpRequestMethodNotSupportedException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;



@Controller
public class CustomErrorController implements ErrorController {
    @RequestMapping("/error")
    public String handleError(HttpServletRequest request, Model model) {

        return "login";
    }

    @Override
    public String getErrorPath() {
        return "/error";
    }
}
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