在Spring MVC中，有什么方法可以请求不继续用户会话？

Question

I need to make an ajax request to server to check if user's session expired. The problem is that this request will continue user session if session was not expired. How to tell Spring not to continue session for this particular request?

Answer 1

One possible way to expire the HTTP session is to expire the JSESSIONID cookie. You can get an array of cookies from HttpServletRequest 's getCookies() method. You can find the cookie with name JSESSIONID from that array. We can not delete the cookie using the Cookie object though. But we can expire it by setting the max age to zero ie cookie.setMaxAge(0). Here is a possible implementation you can try to use:

public static void expireJSessionIdCookie(HttpServletRequest request) {
    Cookie[] cookies = request.getCookies();
    Optional<Cookie> cookieOpt = Stream.of(cookies)
            .filter(c -> c.getName().equalsIgnoreCase("JSESSIONID"))
            .findFirst();
    if (cookieOpt.isPresent()) {
        Cookie cookie = cookieOpt.get();
        cookie.setMaxAge(0);            
    }
}