springboot普通类中如何获取session问题

public class ServletUtil {

    public static ServletRequestAttributes getRequestAttributes() {

        return (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
    }

    public static HttpServletRequest getRequest() {
        return getRequestAttributes().getRequest();
    }
}

server.servlet.session.cookie.http-only=false

<Context useHttpOnly="false"><Context>

@RequestMapping(value="/query", method=RequestMethod.GET)
public ModeAndView queryInfo(@RequestParam(value="sq")String sq,
                          HttpServletRequest request,
                          HttpServletResponse response
                          ) {
 
      ModeAndView view = new ModeAndView();
      //... view 操作
      Cookie[] cookies = request.getCookies();
      String sessionId = request.getSession().getId();
      if (cookies == null) {
          Cookie cookie = new Cookie("JSESSIONID", sessionId);
          cookie.setMaxAge(5 * 60);
          cookie.setDomian("localhost");
          cookie.setPath("/hand");
          response.addCookie(cookie);
      } else {
          for (Cookie cookie : cookies) {
              if (cookie.getName().equals("JSESSIONID")) {
                  cookie.setMaxAge(5 * 60);
                  cookie.setValue(sessionId);
                  cookie.setDomain("localhost");
                  cookie.setPath("/hand");
                  response.addCookie(cookie);
                  break;
              }
          }
      }
 
      return view;
}

var s = $.ajax({
  type: "get",
  timeout: 8000,
  xhrFields: { withCredentials: true},
  url: "/hand/val",
  data: {"params": ""},
  success: function(rel) {
      console.log(rel)
  },
  error: function() {
      console.log("failed")
  },
  complete: function(XMLHttpRequest, status) {
      if (status == "timeout") {
          s.abort();
          console.log("timeout");
      }
  }
})