Problem in session.setAttribute (like the other user!)

Question

Hello,
when JSP is invoked by the servlet it found ID = null
My Servlet has this code ( I tried to let connection and statement open like you said in another post, but nothing)
The worse thing is that, the first time I tried this code, it worked!
public class Login extends HttpServlet{
     private Connection con;
     private Statement st;
     private ResultSet rs,rs2;
     public void doGet(HttpServletRequest req,HttpServletResponse res) {
          try{
          Class.forName("com.mysql.jdbc.Driver");
          con=DriverManager.getConnection("jdbc:mysql://localhost:3306/gecoprova","root","argoilcane");
          st=con.createStatement();     
          rs=st.executeQuery("SELECT * FROM anagrafe_procuratori WHERE ragsoc='"+req.getParameter("ID")+"'");          
          if(rs!=null){
               if(rs.next())try {
                    st=con.createStatement();
                    rs2=st.executeQuery("SELECT * FROM privilegi_procuratore WHERE (userid='"+req.getParameter("ID")+"' AND pass='"+req.getParameter("pass")+"')");
                    if(rs2!=null){
                         if(rs2.next())try {
                                        HttpSession session=req.getSession(true);
                                        String ID=req.getParameter("ID");
                                        String pass=req.getParameter("pass");
                                          session.setAttribute(pass,pass);
                                        session.setAttribute(ID,ID);
                                        // rs2.close();     
                                        // con.close();
                                        String url = res.encodeRedirectURL("Inserimento.jsp");
                                        res.sendRedirect(url);
               }catch (Exception e){e.printStackTrace();}
               res.sendRedirect("errorlogin.html");
          else{
               res.sendRedirect("errorlogin.html");
               }catch (Exception e){e.printStackTrace();}
               res.sendRedirect("errorlogin.html");
          else{
               res.sendRedirect("errorlogin.html");
          res.sendRedirect("errorlogin.html");
          catch(Exception e){
               try {
                    e.printStackTrace();
                    res.sendRedirect("errorlogin.html");
               catch(Exception e1){}
     }

Answer 1

Hello,
when JSP is invoked by the servlet it found ID =
null
My Servlet has this code ( I tried to let connection
and statement open like you said in another post, but
nothing)
The worse thing is that, the first time I tried this
code, it worked!
public class Login extends HttpServlet{
     private Connection con;
     private Statement st;
     private ResultSet rs,rs2;
public void doGet(HttpServletRequest
t req,HttpServletResponse res) {
          try{
          Class.forName("com.mysql.jdbc.Driver");
          con=DriverManager.getConnection("jdbc:mysql://localh
ost:3306/gecoprova","root","argoilcane");
          st=con.createStatement();     
rs=st.executeQuery("SELECT * FROM
OM anagrafe_procuratori WHERE
ragsoc='"+req.getParameter("ID")+"'");          
          if(rs!=null){
               if(rs.next())try {
                    st=con.createStatement();
rs2=st.executeQuery("SELECT * FROM
FROM privilegi_procuratore WHERE
(userid='"+req.getParameter("ID")+"' AND
pass='"+req.getParameter("pass")+"')");
                    if(rs2!=null){
                         if(rs2.next())try {
                                        HttpSession session=req.getSession(true);
                                        String ID=req.getParameter("ID");
                                        String pass=req.getParameter("pass");
                                          session.setAttribute(pass,pass);
                                        session.setAttribute(ID,ID);
                                        // rs2.close();     
                                        // con.close();
String url =
ng url = res.encodeRedirectURL("Inserimento.jsp");
                                        res.sendRedirect(url);
               }catch (Exception e){e.printStackTrace();}
               res.sendRedirect("errorlogin.html");
          else{
               res.sendRedirect("errorlogin.html");
               }catch (Exception e){e.printStackTrace();}
               res.sendRedirect("errorlogin.html");
          else{
               res.sendRedirect("errorlogin.html");
          res.sendRedirect("errorlogin.html");
          catch(Exception e){
               try {
                    e.printStackTrace();
                    res.sendRedirect("errorlogin.html");
               catch(Exception e1){}
hi ...
i think u retrive the session information in jsp like this ....
session.getAttribute("ID");
session.getAttribute("pass");
if this so .. then u made a mistake in ur servlet code
check wat u write in ur servlet
String ID=req.getParameter("ID");
String pass=req.getParameter("pass");
session.setAttribute(pass,pass);
session.setAttribute(ID,ID);
the first argument of setAttribute method is used as key ... which u set as ID and pass .. but b4 that u set ID and pass to string values that r coming from request...
change the code in servlet to this
String ID=req.getParameter("ID");
String pass=req.getParameter("pass");
session.setAttribute("pass",pass);
session.setAttribute("ID",ID);
i think it will work now
session.getAttribute("ID");
session.getAttribute("ID");