public int registerUser()throws Exception
    {
        int i=0;
        DBconn db=new DBconn();    
        Connection con=null;
        PreparedStatement stmt=null;
        //User u1=new User();
         try
            {
             con=db.getConnection();
             stmt=con.prepareStatement("insert into userTable(name,password) values(?,?)");
             stmt.setString(1,username);
             stmt.setString(2,password);
             i=stmt.executeUpdate();
             
        }catch(Exception e)
        {
            e.printStackTrace();
        }
        finally
        {
            stmt.close();
            //con.close();
            db.closeConnection(con);
        }
        return i;
    }
    
    public String execute()throws Exception
    {
        if(registerUser()!=0)
        {
            return "success";
        }
        else
        {
            return "fail";
        }
    }