jsp条件查询的翻页有关问题

<%@page import="javax.jms.Session"%><%@page import="org.apache.tomcat.jdbc.pool.interceptor.SlowQueryReport.QueryStats"%><%@page import="javax.management.Query"%><%@page import="javax.jms.QueueSession"%><%@page import="java.text.SimpleDateFormat"%><%@page import="java.sql.ResultSet"%><%@page import="model.config.Config"%><%@page import="com.whale.empire.MysqlDB"%><%@page import="java.util.*" %><%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@include file="_header.jsp"%>  <script language="javascript" type="text/javascript" src="../js/My97DatePicker/WdatePicker.js""></script><%        MysqlDB db = new  MysqlDB(Config.inst().mstr);    java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat("yyyy-MM-dd");         Date date = new Date();    Calendar cal = Calendar.getInstance();      cal.add(Calendar.MONTH, -1);    Date date2 = cal.getTime();    String startTime = request.getParameter("startTime");    if(startTime==null) startTime=sdf.format(date2);    String endTime = request.getParameter("endTime");    if(endTime==null) endTime=sdf.format(date);    int pageSize = 2;//一页显示的记录数    String page2 = request.getParameter("page");//取得待显示页码    Integer page1 = 0;//待显示页码    if(page2 == null || page2.equals(""))           page1 = 0;    else           page1 = Integer.parseInt(page2);    if (page1 < 0)        page1 = 0;    %><form  method="post"><p>查询日期:<input name="startTime" type="text" class="Wdate" onClick="WdatePicker()" value="<%=startTime%>"/>到            <input name="endTime" type="text" class="Wdate" onClick="WdatePicker()"value="<%=endTime%>"/>                <input type="submit" value="查询"></p></form> <table border=1 width=400 class=data><tr><th>用户ID</th><th>用户来源</th><th>邀请时间</th><th>平台</th></tr><tr><%        int rowCount = db.count("select count(id) from invited WHERE add_time>='"+ startTime + "' and date(add_time)<='"+ endTime + "'");//记录总数    int pageCount = (rowCount-1)/pageSize;//计算总页数    if (page1>pageCount) page1 = pageCount;    int i =0;    ResultSet rs = db.query("select * from invited WHERE add_time>='"+ startTime + "' and date(add_time)<='"+ endTime + "' ORDER BY add_time DESC LIMIT "+page1*pageSize+","+pageSize+"");        while( rs.next()){%>        <tr>                 <td><%=rs.getString(2)%></td>         <td><%=rs.getString(3)%></td>         <td><%=rs.getString(4)%></td>         <td><%=rs.getString(5)%></td>        </tr><%        i++;        }    %><tr><td colspan=5 align="center"><a href="?page=<%=((page1 - 1) >= 0 ? (page1-1):0)%>">上一页</a> ||第<%=page1+1%>页| 共<%=pageCount+1%>页||<a href="?page=<%=(page1 + 1)%>">下一页</a></td></tr><tr><td colspan=5 align="center"><%int j;  for(j=0;j<pageCount+1;j++){%><a href="invited.jsp?page=<%=j%>"><%=j+1%></a><%}%></td></tr></table><%@include file="_footer.jsp"%>