jsp+servlet+javabean的分页显示，进来给点思路，多谢！ 100分

 //roomBean.javapublic Vector list_room(String username){        Vector vc=new Vector();       String sql="select r_number,r_photo,if_book,r_area,r_price,r_facility,insert_time from room_info where username='"+username+"' order by insert_time desc";       try{         this.stmt=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);         rs=stmt.executeQuery(sql);         while(rs.next())         {  bossBean bos=new bossBean();            bos.setR_number(rs.getString("r_number"));            bos.setR_photo(rs.getString("r_photo"));            bos.setR_area(rs.getString("r_area"));            bos.setR_price(rs.getString("r_price"));            bos.setR_facility(rs.getString("r_facility"));            bos.setInsert_time(rs.getString("insert_time"));            bos.setIf_book(rs.getString("if_book"));            vc.add(bos);                  }              }              catch(Exception e)       {e.printStackTrace();}       return vc;   }

 //selectList.javaif(request.getParameter("send").equals("list_room")){                username=(String)session.getAttribute("username");                 String goToPage = request.getParameter("list_room");                Vector result=db.list_room(username,goToPage);                request.getSession().setAttribute("list_room",(Object)result);                  request.getSession().setAttribute("boss_info",null);                  request.getSession().setAttribute("search",null);                request.getSession().setAttribute("addroom",null);                request.getSession().setAttribute("upload_success",null);                request.getSession().setAttribute("nullresult",null);                 RequestDispatcher rd=request.getRequestDispatcher("trader_index.jsp");                rd.forward(request,response);                        }