pageraction.java

网上书城源码

package com.wang.action;

import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import java.io.*;
import com.wang.db.MyDb;
import java.util.ArrayList;
import com.wang.bean.*;

public class PagerAction
    extends Action
{
    public ActionForward execute(ActionMapping mapping, ActionForm form,
                                 HttpServletRequest request,
                                 HttpServletResponse response)
    {
        String page = request.getParameter("page");
        String bookTypeId = request.getParameter("TypeId");
        String bookStep =request.getParameter("bookStep");
        com.wang.db.MyDb md = new MyDb();
        int countPage = 0;
        if (bookTypeId != null)
        {
            countPage = md.getPageCount(1, 6,
                                        Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));

            ArrayList bookList = md.getPageData(1, 6,
                                                Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
            request.setAttribute("bookList", bookList);
            request.setAttribute("page", 1);
            request.setAttribute("TypeId", bookTypeId);
            request.setAttribute("countPage",countPage);
            request.setAttribute("bookStep",bookStep);
        }

        if (request.getParameter("next") != null)
        {
           String flage = request.getParameter("next");
            if (flage.equals("true"))
            {
                countPage = md.getPageCount(1, 6,
                                        Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
                ArrayList bookList = md.getPageData(Integer.parseInt(page),
                    6,
                    Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
                request.setAttribute("bookList", bookList);
                request.setAttribute("page", page);
                request.setAttribute("TypeId", bookTypeId);
                 request.setAttribute("countPage",countPage);
                 request.setAttribute("bookStep",bookStep);
            }
            else
            {

                    countPage = md.getPageCount(1, 6,
                                        Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
                    ArrayList bookList = md.getPageData(Integer.parseInt(page),
                        6,
                        Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
                    request.setAttribute("bookList", bookList);
                    request.setAttribute("page", page);
                    request.setAttribute("TypeId", bookTypeId);
                    request.setAttribute("countPage",countPage);
                    request.setAttribute("bookStep",bookStep);

            }
        }

        if (page != null)
        {
            if (page.equals("frest"))
            {
                countPage = md.getPageCount(1, 6,
                                        Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
                ArrayList bookList = md.getPageData(1, 6,
                    Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
                request.setAttribute("bookList", bookList);
                request.setAttribute("page", 1);
                request.setAttribute("TypeId", bookTypeId);
                request.setAttribute("countPage",countPage);
                request.setAttribute("bookStep",bookStep);
            }
            if (page.equals("last"))
            {
                countPage = md.getPageCount(1, 6,
                                        Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
                ArrayList bookList = md.getPageData(countPage, 6,
                    Integer.parseInt(bookTypeId),Integer.parseInt(bookStep));
                request.setAttribute("bookList", bookList);
                request.setAttribute("page",countPage);
                request.setAttribute("TypeId", bookTypeId);
                request.setAttribute("countPage",countPage);
                request.setAttribute("bookStep",bookStep);

            }
        }

        return mapping.findForward("list");
    }
}