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some problem with java beans scope attribute?

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posted 16 years ago

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i make a javabena element in a page and its scope is session but it not working correctly, because i do not access it next two page in same session and error create object?

following are code for create java bean in jsp

<%@page import="DAO.*" session="true"%>
<jsp:useBean id="pDAO" scope="session" class="DAO.BankDAO" />
 
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Controller jsp</title>
    </head>
    <body>        
                      
    <%        
        String login = request.getParameter("login");
        String password = request.getParameter("password");
      
        //search for user login
        
        boolean isFlage = pDAO.search(login,password);
        
        if(isFlage){ 
            //store value in session variable of user which login to bank
            //set login in session to retrieve user name in next page
            session.setAttribute("login",login);
            //set interval time of user session to -1 
            session.setMaxInactiveInterval(-1);
            //differentiate users and adminstration 
            //if it admin then admin page other user page
            if(login.equals("administration")){ 
                response.sendRedirect("admin.jsp");                
     %>
                <%--<jsp:forward page="admin.jsp"/>--%>
     <%}
        else{                 
                //if it is user then show user page
             response.sendRedirect("user.jsp");
     %>
                <%--<jsp:forward page="user.jsp"/>--%>
     <%}
         }else{
                //if user is not login then enter login value unknown
                session.setAttribute("login","unknown");
                response.sendRedirect("index.jsp");                
                %>
                <%--<jsp:forward page="index.jsp"/>--%>
            <%}%>
    </body>
</html>
 
and next page is 
 
 
<%@ page import="DAO.*" session="true"%>
 
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
    
    
    <%
        String login   = request.getParameter("login");
        String oldPass = request.getParameter("oldpass");
        String newPass = request.getParameter("newpass");                                                         
            
            //out.println(login+"   "+oldPass+"  "+newPass);
      
            boolean isFlage = pDAO.changePassword(login,oldPass,newPass);
            //out.println(isFlage);
            
            if(isFlage){
                //if login is admin then it show admin page else show user page
                if(login.equals("administration")){
                    response.sendRedirect("admin.jsp");
                }//inner if
            else{
                 //   <jsp:forward page="user.jsp"/>
                    response.sendRedirect("user.jsp");
            }//else
            }//outer if 
            else{ 
                response.sendRedirect("changepassword.jsp");
                }//outer else
     %>                      
                <%--<jsp:forward page="changepassword.jsp"/><%}%>--%>
    </body>
</html>

[BSouther: Added UBB CODE tags]
[ January 29, 2008: Message edited by: Ben Souther ]

Christophe Verré

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Posts: 14691

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posted 16 years ago

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In the second page, where does pDAO come from ? You have to get it back.

or use the session implicit object

(I'm not looking at the rest, and I'm not commenting on how difficult it is to read this JSP)

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