嚴重: Servlet.service() for servlet [jsp] in context with path [/CookieDemo1] threw exception [An exception occurred processing JSP page /dologin.jsp at line 41

38: ?? ???????? usernameCookie.setMaxAge(864000);
39: ?? ???????? passwordCookie.setMaxAge(864000);
40: ?? ??????? ?
41: ?? ???????? response.addCookie(usernameCookie);
42: ?? ???????? response.addCookie(passwordCookie);
43: ?? ???? }? else
44: ?? ???? {


Stacktrace:] with root cause