Abrufen von Sitzung von einem anderen Servlet

Question

Ich versuche, ein Benutzerobjekt in Sitzung in Servlet1 zu speichern. In Servlet2 versuche ich, die Werte von der gleichen eingeloggten Sitzung von Servlet1 zu bekommen.

Servlet1:

private void login(HttpServletRequest request, HttpServletResponse response) throws IOException { 
    request.setCharacterEncoding("UTF-8"); 

    String emailFromForm = request.getParameter("email").toLowerCase(); 
    String passwordFromForm = request.getParameter("passWord"); 

    try { 
     User userThatLogsIn = manager.getUser(emailFromForm); 
     String passwordFromDB = userThatLogsIn.getPassword(); 

     if (passwordFromDB.equals(passwordFromForm)) { 
      request.getSession().setAttribute("TheLoggedInUser", userThatLogsIn); 
      response.sendRedirect("/Slit/welcome.jsp"); 
     } else { 
      request.setAttribute("error", "Unknown login, try again"); 
      response.sendRedirect("/Slit/LoginFailed.jsp"); 
     } 
    } catch (NullPointerException nullPointer) { 
     System.err.println("NullPointerException: " + nullPointer.getMessage()); 
     response.sendRedirect("/Slit/LoginFailed.jsp"); 
    } 
} 

Servlet2: Im einen Nullpointer sessionaccept fnavn bei Mypage.MyPageServlet.sessionAccept (MyPageServlet.java:40)

private void sessionAccept(HttpServletRequest request, HttpServletResponse response) throws IOException { 
    HttpSession session = request.getSession(); 
    session.setMaxInactiveInterval(30 * 60); 
    User loggedInUser = (User) request.getAttribute("TheLoggedInUser"); 
    String fnavn = loggedInUser.getfName(); 
    String enavn = loggedInUser.getlName(); 
    String epost = loggedInUser.getEmail(); 


    request.getSession().setAttribute("messageJSP", "Velkommen" + epost); 
    response.sendRedirect("Innstillinger.jsp"); 

} 

Answer 1

User loggedInUser = (User) request.getAttribute("TheLoggedInUser"); 

Diese Linie bekommen

muss mit

ersetzt werden

User loggedInUser = (User) 
request.getSession().getAttribute("TheLoggedInUser");