•  19-10-2022
  •  | 
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题

index.jsp:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Login</title>
</head>
<body>
<h1>
<font color=orange ><center> Authentification </font> </h1>
<form name"loginform" action="login" method="post">
<p> Enter your ID: <input type="text" name="id"><br>
<input type="submit">

</form>
</body>
</html>

Authentification.java:

  protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
            HttpSession session = request.getSession();

            int IdUser = Integer.valueOf(request.getParameter("id"));
            session.setAttribute("ide", IdUser);

            try {

                if(auth.authen(IdUser)){
                    session=request.getSession();

                       request.getRequestDispatcher("acceuil.jsp").forward(request, response);
                       System.out.println("found");}
                else{
                       request.getRequestDispatcher("index.jsp").forward(request, response);
                      System.out.println("not found");
                }

            } catch (SQLException e) {

                e.printStackTrace();
            }


        }

acceuil.jsp: Where I want to display IdUser

 <% Integer idUser = (Integer)session.getAttribute("IdUser"); %>
<!--some HTML code--> 
<div id="corps"><h1>
        Welcome <%=idUser%> </h1></div>

So what I want to have is after the user enter's his id and if the id is found in the database(this operation works) there would be a message ncluding the user's id. the get.Attribute doesn't return a value instead in my page the result is "Welcome NULL".

没有正确的解决方案

其他提示

You saved the attribute in session with name "ide" but try to recover it with name "IdUser". Use the same attribute name in both places.

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