/**
 * @return Error page registry bean
 */
@Bean
public ErrorPageRegistrar errorPageRegistrar() {
	return new ErrorPageRegistrar() {
		@Override
		public void registerErrorPages(ErrorPageRegistry epr) {
			epr.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/not-found"));
			epr.addErrorPages(new ErrorPage(HttpStatus.FORBIDDEN, "/error/403"));
			epr.addErrorPages(new ErrorPage(HttpStatus.UNAUTHORIZED, "/error/401"));
			epr.addErrorPages(new ErrorPage(HttpStatus.INTERNAL_SERVER_ERROR, "/error/500"));
			epr.addErrorPages(new ErrorPage(HttpStatus.SERVICE_UNAVAILABLE, "/error/503"));
			epr.addErrorPages(new ErrorPage(HttpStatus.BAD_REQUEST, "/error/400"));
			epr.addErrorPages(new ErrorPage(HttpStatus.METHOD_NOT_ALLOWED, "/error/405"));
			epr.addErrorPages(new ErrorPage(Exception.class, "/error/500"));
		}
	};
}
 

@Bean
public ErrorPageRegistrar errorPageRegistrar() {
	return (registry) -> {
		registry.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/404.html"));
		registry.addErrorPages(new ErrorPage("/error/index.html"));
	};
}
 

@Bean
public ErrorPageRegistrar errorPageRegistrar() {
	return new CustomErrorPageRegistrar();
}
 

@Bean
public ErrorPageRegistrar myErrorPageRegistrar() {
    return registry -> registry.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/index.html"));
}
 

@Bean
public ErrorPageRegistrar errorPageRegistrar() {
  return new MyErrorPageRegistrar();
}