ResponseBody RequestMappingdel public void delInteger id bookServiceremoveByIdid;

This is a Java method that handles a HTTP POST request to delete a book from a database. The annotation @ResponseBody tells Spring MVC to return the response in the HTTP response body instead of rendering a view. The @RequestMapping("/del") annotation maps the URL path "/del" to this method. The method takes an Integer parameter id, which is the ID of the book to be deleted. The bookService.removeById(id) method is called to remove the book from the database.