如果是 ORACLE,那么 ORACLE 已经提供了分页的处理机制!!(rownum)
如果是其他,例如 sql server,可以使用 TOP,但要记住上一页最后一条记录的 ID!
如果是其他,例如 sql server,可以使用 TOP,但要记住上一页最后一条记录的 ID!
解决方案 »
- seo实战密码:60天网站流量提高20倍(zac)全本pdf下载
- web路径问题!!
- 求:当text为空的时候checkbox为灰色
- jxl读取excel
- history.back的问题
- location.replace("/module/rili/index_en.jsp");响应很慢甚至没反映
- 救救我吧!关于TOMCAT的问题!!!
- ●●有没有人用过Acrobat JavaScript,有几个问题请教,急●●
- jrun 3 的序列号救我啊!
- 求助推荐struts1的学习视频
- 帮忙看看以下分页程序,可以分页了但还有点错误(见内容)
- 关于jsp分页,有什么方法?什么是cach分页?讲讲方法,给个例子!谢谢!
PreparedStatement prepstmt = m_conn.prepareStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY,strSql);
prepstmt.setFetchSize(10); //10条纪录
ResultSet rs = prepstmt.executeQuery() ;试试看吧。
我上次做了一个sqlserver 的分页.效果不是很理想..
" WHERE obj_id NOT IN (SELECT TOP "
+ currPage * pageRecords + " obj_id FROM " + dataTableName +
" ORDER BY obj_id ASC ) ORDER BY obj_id ASC ";pageRecords : 条数
dataTableName : 数据库表名
currPage :当前页数记住这句话,不敢说是最好的,但绝对是最经典的 ------------------------------------------------------
我们还年轻牛奶会有的奶牛也会有的
可天天在 csdn 混这些会有吗 ??
//PageCt.java 分页的类
/*
*** @version ***********
*** Created on 2001年6月25日, 下午14:41
**************************************
*/
package vod;
import java.sql.*;
import java.util.*; public class PageCt
{
private long l_start; //开始纪录
private long l_end; //结束纪录
private long l_curpage; //当前页数
private long l_totalnum;//总记录数
private int int_num=5; //每页10条
private long l_totalpage; //总的页数
public void Init(long currentpage,long totalnum)
{
l_curpage = currentpage;
l_totalnum = totalnum;
if (currentpage>=0)
{
if (currentpage>=(long)Math.ceil((double)l_totalnum/(double)int_num))
l_curpage = (long)Math.floor((double)l_totalnum/(double)int_num);
else
l_curpage = currentpage;
}
else
{
l_curpage = 0;
}
l_start = l_curpage * int_num;
l_end = l_start + int_num;
if (l_end > l_totalnum)
l_end = l_totalnum;
l_totalpage = (long)Math.ceil((double)l_totalnum/(double)int_num);
}
public long getCurpage()
{
return l_curpage;
}
public long getPrepage()
{
if (l_curpage-1>=0)
{
return l_curpage-1;
}
else
{
return 0;
}
}
public long getNextpage()
{
if (l_curpage+1<=l_totalpage)
{
return l_curpage+1;
}
else
{
return l_totalpage;
}
}
public long getTotalnum()
{
return l_totalnum;
}
public long getTotalpage()
{
return l_totalpage;
}
public long getStart()
{
return l_start;
}
public long getEnd()
{
return l_end;
}
};
===============================================
//调用例子
<%
/*
*** @author 马毅 ***********
*** @version ***********
*** Created on 2001年6月12日, 下午17:13
**************************************
*/
<%@ page import="java.sql.*"%>
<%@ page import="java.lang.*"%>
<%@ page contentType="text/html;charset=gb2312" %>
<jsp:useBean id="PageCount" scope="page" class="kstest.PageCt" />
<jsp:useBean id="sqlbean" scope="page" class="vod.sql_data" />
<html>
<head>
<TITLE>测试</TITLE>
<STYLE>
body,table{font-size:9pt}
A:link {
COLOR: #000084; TEXT-DECORATION: none
}
A:visited {
COLOR: #000084; TEXT-DECORATION: none
}
A:hover {
COLOR: black; TEXT-DECORATION: underline
}
.ourfont {
FONT-SIZE: 9pt
}
</STYLE>
</head>
<body bgcolor=#eff3ff>
<center>
<font color=#000084><h3>Test for Test</h3></font>
<hr width=600 color=#b5dbff>
<br>
<%
ResultSet rs0 = sqlbean.executeQuery("select count(*) from UserList );
rs0.next();
long data_num=rs0.getLong(1);
long Current_Page = 0;
String currentpage=(String)request.getParameter("currentpage");
if (currentpage != null && !currentpage.equals(""))
{
Current_Page = Integer.parseInt(request.getParameter("currentpage"));
}
String Query_Page=(String)request.getParameter("Query_Page");
if (Query_Page!=null && !Query_Page.equals(""))
{
Current_Page = Integer.parseInt(request.getParameter("Query_Page"))-1;
}
PageCt.Init(Current_Page,data_num);
long l_start = PageCt.getStart();
long l_end = PageCt.getEnd();
//查询记录
ResultSet rs = sqlbean.executeQuery("select * from UserList " );
long i=0;
while((i<l_start) && rs.next())
{
i++;
}
//输出查询结果
long j=0;
while(rs.next() && (i<l_end))
{
j=i+1;
String col2 = rs.getString(2);
String col3 = rs.getString(3);
String col4 = rs.getString(4);
String col5 = rs.getString(5);
String col6 = rs.getString(6);
String col7 = rs.getString(7);
String col8 = rs.getString(8);
//打印所显示的数据
out.println("<table border=0 width=600>");
out.println("<tr><td colspan=2><font color=#000084>" + j + "、"+(col2==null?"":col2)+"</font></td></tr><tr><td colspan=2>答案:"+(col3==null?"":col3)+"</td></tr>");
out.println("<tr><td> 选项1:"+(col4==null?"":col4)+"</td><td> 选项2:"+(col5==null?"":col5)+"</td></tr>");
out.println("<tr><td> 选项3:"+(col6==null?"":col6)+"</td><td> 选项4:"+(col7==null?"":col7)+"</td></tr>");
if (col8!=null && !col8.equals(""))
{
out.println("<tr><td colspan=2>备注:"+col8+"</td></tr>");
}
out.println("</table><br>");
i++;
}
%>
<table width=600>
<tr bgcolor=#b5dbff>
<form method=GET action=index.jsp>
<td width=80 align=center valign=bottom>共 <%=PageCt.getTotalnum()%> 条</td>
<td width=80 align=center valign=bottom><%=PageCt.getCurpage()+1%>/<%=PageCt.getTotalpage()%> 页</td>
<td width=120 align=center>查看第 <input type=text name=Query_Page size=3> 页</td>
<td width=50 align=center valign=bottom><a href=index.jsp?currentpage=<%=PageCt.getPrepage()%>>上页</a></td>
<td width=50 align=center valign=bottom><a href=index.jsp?currentpage=<%=PageCt.getNextpage()%>>下页</a>
</td>
</tr>
</table>
<br><br><br>
<table cellspacing=20>
<tr>
<td>问题包含<input type=text name=question_str size=10 value=<% if (question_str != null) out.println(question_str); %> ></td>
<td>答案包含<input type=text name=answer_str size=10 value=<% if (answer_str != null) out.println(answer_str); %> ></td>
<td>选项包含<input type=text name=sel_str size=10 value=<% if (sel != null) out.println(sel); %> ></td>
</tr>
<tr>
<td colspan=3 align=center><input type=submit value=查询></td>
</tr>
</form>
</table>
<br><br>
<a href="insert.jsp">添加</a>
<center>
</body>
</html>
分页一个是为了好看,另一个是为了查询的效率.这也一来只会增加系统开销... ------------------------------------------------------
我们还年轻牛奶会有的奶牛也会有的
可天天在 csdn 混这些会有吗 ??
TEST.java
TESTAction.java
TESTDAO.java
TESTForm.java
TEST.jsp
TESTOut.jsp代码见:
http://expert.csdn.net/Expert/topic/2228/2228055.xml?temp=.1732599
import java.util.*;/**
* Title:分页
* Description:
* Copyright: Copyright (c) 2004
* Company:
* author:颜喜班
* @version 1.0
*/
public class SplitPager
{
/*
* _sql_str:传入的sql语句
* _total_records: 总记录数目
* _pageSize: 每页显示的记录数目
* _page: 所分的逻辑页数
*/
private Connection con=null;
private Statement stmt=null;
private ResultSet rs=null;
private ResultSetMetaData rsmd=null;
private String _sql_str;
private int _total_records;
private int _pages;
private int _pagesize;
public void setConnection(Connection con)
{
this.con=con;
if (this.con == null)
System.out.println("Failure to get a connection!");
else
System.out.println("Success to get a connection!");
}
public void initialize(String sqlStr,int pageSize)
{
this._sql_str=sqlStr;
this._pagesize=pageSize;
try{
stmt=this.con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
rs=stmt.executeQuery(this._sql_str);
rsmd=rs.getMetaData();
if (rs!=null)
{
rs.last();
this._total_records = rs.getRow();
rs.first();
this._pages = (this._total_records - 1) / this._pagesize + 1;
}
}
catch(SQLException e){System.out.println(e.toString()); }
}
public Vector getPage(int ipage){
Vector vData=new Vector();
int n=ipage;
int m=0;
m=(n-1)*this._pagesize+1;
try{
if (rs!=null)
{
rs.absolute(m);
for(int i=0;i<this._pagesize;i++){
String[] sData=new String[rsmd.getColumnCount()];
for(int j=0;j<rsmd.getColumnCount();j++)
{
sData[j]=rs.getString(j+1);
}
if (sData==null)
{
break;
}
vData.addElement(sData);
rs.next();
}
}
rs.close();
stmt.close();
}
catch(SQLException e){System.out.println(e.toString()); }
return vData;
}
public int getPages()
{
return this._pages;
}
public int getTotalRecords()
{
return this._total_records;
}}