0
loggedIn Stringオブジェクトをフラグとして使用しようとしています。ログに出力する際にnull値を返すのはなぜですか？Javaセッション属性がnullを返す理由
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String loggedIn = "false"; //create a marker to tell if the user is logged in
String url = "/index.jsp";
HttpSession session = request.getSession();
// get a user object from the session.
User sessionUser =(User) session.getAttribute("user");
// create empty message strings
String messageSuccess = "";
String passwordMismatch = "";
session.setAttribute("loggedIn", loggedIn);
System.out.println("The loggedIn attribute of the session object is: " + session.getAttribute(loggedIn));
String action = request.getParameter("action");
if (action == null) {
action = "join";
}
if (action.equals("join")) {
url = "/new_customer.jsp";
} else if (action.equals("signIn")) {
// User sessionUser = (User) session.getAttribute("sessionUser");
if (sessionUser == null) {
url = "/login_failure.jsp";
} else {
String username = request.getParameter("username");
String password = request.getParameter("password");
if (username.equals(sessionUser.getUserName()) && password.equals(sessionUser.getPassword())) {
url = "/account_activity.jsp";
loggedIn = "true";
session.setAttribute("loggedIn", true);
} else {
url = "/login_failure.jsp";
}
}
}