SpringBoot自定义错误页面

@Component
public class ErrorPageConfig implements ErrorPageRegistrar {
    @Override
    public void registerErrorPages(ErrorPageRegistry registry) {
        ErrorPage error400Page = new ErrorPage(HttpStatus.BAD_REQUEST, "/error/404");
        ErrorPage error404Page = new ErrorPage(HttpStatus.NOT_FOUND, "/error/404");
        ErrorPage error500Page = new ErrorPage(HttpStatus.INTERNAL_SERVER_ERROR, "/error/500");
        registry.addErrorPages(error400Page,error404Page,error500Page);
    }
}

@RequestMapping("/error/{status}")
public String errorPage(@PathVariable Integer status){
    switch (status){
        case 401:
        case 400:return "/error/404";
        case 500:return "/error/500";
        default:return "/error/default";
    }
}