Question : How to do paggination in Jsp

Hi ,

I have fetch some data that have more than 20 rows so i need paggination .
How can i do paggination ??

Thanks

Answer : How to do paggination in Jsp

Here the code in doPost method after getting the result... keep iit  vector v

      v = new Vector(msgList);

                        log.info("Vector in QueryServlet from MessageBean: " +v);

                        if(v != null && v.size()>0)
                        {
                              log.info("Vector in QueryServlet from MessageBean: " +v.size());
                              mr = (MsgReply)v.get(0);
                              System.out.println("MsgReply in QueryServlet : "+mr);
                              if(mr != null && mr.getMsgId()!=null)
                              {
                                    log.info("Vector size in QueryServlet: " + v.size());

                                    session.setAttribute("mhb/MessageReplyVec", v);

                                    int noOfRecPerPage = 0;
                                    //Integer.parseInt(bundle.getString("No_Of_Messages"));
                                    try
                                    {
                                          String str_No_Of_Records = bundle.getString("No_Of_Messages");
                                          if(str_No_Of_Records != null && str_No_Of_Records.trim().length() != 0)
                                          {
                                                noOfRecPerPage = Integer.parseInt(str_No_Of_Records);
                                          }
                                          System.out.println("No of Messages : --"+bundle.getString("No_Of_Messages")+"--");
                                    }
                                    catch(NumberFormatException nfe)
                                    {
                                          System.out.println("NumberFormatException : "+nfe);
                                    }
                                    catch(java.util.MissingResourceException mre)
                                    {
                                          System.out.println("MissingResourceException : "+mre);
                                    }

                                    if(noOfRecPerPage > 0)
                                    {
                                          int endIndex = 0;
                                          if(noOfRecPerPage > v.size())
                                          {
                                                endIndex = v.size();
                                          }
                                          else
                                          {
                                                endIndex = noOfRecPerPage;
                                          }
                                          List l = v.subList(0,endIndex);
                                          Vector vsub = new Vector(l);
                                          log.info("Vector sub in QueryServlet: " + vsub);
                                          log.info("Vector sub size in QueryServlet: " + vsub.size());
                                          req.setAttribute("mhb/MessageReplyVecReq", vsub);
                                    }
                                    else
                                    {
                                          req.setAttribute("mhb/MessageReplyVecReq", v);
                                    }
                                    session.setAttribute("mhb/MessageReplyVecSize", new Integer(v.size()));







Here the code in doGet method

int noOfRecPerPage = Integer.parseInt(bundle.getString("No_Of_Messages"));
            log.debug("NEXT BUTTON");
            Vector v = (Vector)session.getAttribute("mhb/MessageReplyVec");
            log.debug("V.Size : "+v.size());
            log.debug("noOfRecPerPage : "+noOfRecPerPage);

            int noOfRec = v.size();
            int pageNo = 0;
            if(req.getParameter("pageNo") != null){
                  pageNo = Integer.parseInt(req.getParameter("pageNo"));
            }

            int startIndex = 0;
            int endIndex = 0;

            if(pageNo > 1){
                  startIndex = pageNo*noOfRecPerPage-noOfRecPerPage;
            }
            endIndex = startIndex+noOfRecPerPage;
            if(endIndex > noOfRec){
                  endIndex = noOfRec;
            }


            List l = v.subList(startIndex,endIndex);
            Vector vsub = new Vector(l);

            req.setAttribute("mhb/MessageReplyVecReq", vsub);
   Dispatch();




Here the code in JSP page:-

int noOfRecPerPage = 0;
                              try {
                                    String str_No_Of_Records = bundle
                                                .getString("No_Of_Messages");
                                    if (str_No_Of_Records != null
                                                && str_No_Of_Records.trim().length() != 0) {
                                          noOfRecPerPage = Integer
                                                      .parseInt(str_No_Of_Records);
                                    }
                              } catch (NumberFormatException nfe) {
                                    System.out.println("NumberFormatException : " + nfe);
                              } catch (java.util.MissingResourceException mre) {
                                    System.out.println("MissingResourceException : " + mre);
                              }

                              if (noOfRecPerPage == 0) {
                                    noOfRecPerPage = vSize;
                              }

                              int noOfPages = 0;
                              String pageNo = request.getParameter("pageNo");
                              if (request.getParameter("pageNo") != null
                                          && !(request.getParameter("pageNo").equals(""))) {
                                    pageNo = request.getParameter("pageNo");
                              } else {
                                    pageNo = "1";
                              }

                              if (vSize % noOfRecPerPage == 0) {
                                    noOfPages = vSize / noOfRecPerPage;
                              } else {
                                    noOfPages = vSize / noOfRecPerPage + 1;
                              }