In my project using spring-mvc, I have an ajax call that returns void as it only updates database data. However, if the user is not logged in, I want to redirect them to a login page. The issue is that for redirection, I need to specify String as return type instead of void. How can I handle this scenario?
@RequestMapping(value="/add_to_fav")
public @ResponseBody
void add_to_fav( ... ) {
....
if(session.getAttribute("contact") == null)
return "redirect:/login?next="+URLEncoder.encode(
request.getRequestURL().toString() + "" + (request.getQueryString() != null ? "?" + request.getQueryString() : "")
,"utf-8");
....
}