JSP+ACCESS 分页问题

spirit_kolin 2008-05-26 05:44:04

<%@ page import="java.sql.*" pageEncoding="utf-8"%>
<%@ page language="java" import="java.lang.Math.*" %>

<%@ page contentType="text/html"%>
<jsp:useBean id="conn" scope="page" class="db.db"/>

<%!

ResultSet rs=null;
ResultSet rsTmp=null;
String sql="";
int PageSize=6;
int Page=1;
int totalPage=1;
String str="";

public String ShowOnePage(ResultSet rs,int Page,int PageSize){
str="";
//先将记录指针定位到相应的位置
try{
rs.absolute((Page-1)*PageSize+1);
}catch(SQLException e){
}
for(int iPage=1;iPage<=PageSize;iPage++ ){
str+=RsToGbook(rs);
try{
if(!rs.next())break;
}catch(Exception e){
System.out.println("Locate Current Page Error!");
}
}
return str;
}
//显示单行记录子模块

public String RsToGbook(ResultSet rs){
String tt="";
String email="";
String homepage="";
String name="";
String sex="";
String subject="";
String memo="";
String gtime="";
try{
email=rs.getString("email");
homepage=rs.getString("homepage");
name=rs.getString("name");
sex=rs.getString("gender");
subject=rs.getString("title");
memo=rs.getString("content");
gtime=rs.getString("gtime");

if(!email.equals("")){
email="<A href='mailto:"+email+"'><img src='images/email.gif' border='0' alt='电子邮件信箱'></A>";
}
if(homepage.equals("http://")||homepage.equals("")){
homepage="";
}else{
homepage="<A href='"+homepage+"'><img src='images/homepage.gif' border='0' alt='首页'></A>";
}

tt+="<table border='0' width='70%'>";
tt+="<tr><td><table border='0'><tr><td><img src='images/buttom-g.gif'>";
tt+=name+"</td><td>";
tt+=email+homepage;
tt+="</td><td><font style='font:9pt 宋体'>[</font><font style='font:9pt 宋体'color='bule'>"+sex;

tt+="</font><font style='font:9pt 宋体'>]</font></td></tr></table></td></tr>";
tt+="<tr><td></td></tr>";
tt+="<tr><td colspan='4'>"+"<img src='images/file.gif' border='0'alt='主题'>"+subject+"</td></tr>";
tt+="<tr><td colspan='4'>"+"<img src='images/write.gif' border='0'alt='留言'>"+memo+"</td></tr>";
tt+="<tr><td colspan='4'><font face='Arial' size='1'>["+gtime+"]</td></tr>";
tt+="<hr border='1' width='100%'></table>";
}catch(SQLException e){}
return tt;
}
%>
<%

sql="select * from gbook order by gtime desc";
try{
rs=conn.getBySql(sql);//修正
}catch(Exception e){
out.println("访问数据库出错！");
}
rsTmp=conn.getBySql("select count(*) as mycount from gbook");//修正
rsTmp.next();
int totalrecord=rsTmp.getInt("mycount");
if(totalrecord%PageSize==0)totalPage=totalrecord/PageSize;//如果是当前页的整数倍
else totalPage=(int)Math.floor(totalrecord/PageSize)+1;
if(totalPage==0)totalPage=1;
rsTmp.close();
try{
if(request.getParameter("page")==null||request.getParameter("page").equals(""))//修改page
Page=1;
else
Page=Integer.parseInt(request.getParameter("page"));// 修改。。。。。
}catch(java.lang.NumberFormatException e){
//捕获用户从浏览器地址栏直接输入Page=sdfsdf所造成的异常
Page=1;
}
if(Page<1)Page=1;
if(Page>totalPage)Page=totalPage;

%>
<html>
<body bgcolor="#ffffff">
<div align="center">
<img src="images/gbook.gif" width="374" height="93"><br>
[<a href="form.html"><font color="red" onmouseover="this.style.color='#0000bb'" onmouseout="this.style.color='red'">我要留言</font></a>]
<%
out.println((ShowOnePage(rs,Page,PageSize)));
%>
<form action="liuyan.jsp" method="get">
<%
if(Page!=1){
out.println("<A href=liuyan.jsp?page=1>第一页</A>");
out.println("<A href=liuyan.jsp?page="+(Page-1)+">上一页</A>");

}
if(Page!=totalPage){
out.println("<A href=liuyan.jsp?page="+(Page+1)+">下一页</A>");
out.println("<A href=liuyan.jsp?page="+totalPage+">最后一页</A>");
}
rs.close();
%>
<p>输入页数：<input type="text" name="Page" size="3">页数：<font color="red"><%=Page%>/<%=totalPage%></font>
</p>
</form>

<a href="form.html">返回留言表单</a><br><br>
</div>

</body>
</html>

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spirit_kolin 2008-06-04

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这篇问题忘提出我后来又写了篇

East271536394 2008-05-31

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<%@ page contentType="text/html;charset=GBK"%>
<%@ page import="java.sql.*"%>
<html>
<head><title>分页数据显示</title></head>
<body>
<center>
<%
int curpage=0;//当前页
int total_page=0;//总页数
int max_rows=25;//每页显示30行数据
int max_line=0;//总的行数
int number=0;
String str=request.getParameter("curpage");
if(str==null || str.equals("")){
number=(curpage)*max_rows;
curpage=1;
}else{
curpage=Integer.parseInt(str);
number=(curpage-1)*max_rows;
}
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
String url="jdbc:microsoft:sqlserver://127.0.0.1:1433;databaseName=News";
Connection con=DriverManager.getConnection(url,"sa","");
String sql="select count(*) from bookInfo";
PreparedStatement pstmt=con.prepareStatement(sql);
ResultSet rs=pstmt.executeQuery();
rs.next();
max_line=rs.getInt(1);
System.out.println(max_line);

if(max_line%max_rows==0)
total_page=max_line/max_rows;
else
total_page=max_line/max_rows+1;

String page_sql="select top "+max_rows+" * from bookInfo where id not in(select top "+number+" id from bookInfo)";
//String page_sql="select top ? * from bookInfo where id not in(select top ? id from bookInfo)";
pstmt=con.prepareStatement(page_sql);
//pstmt.setInt(1,max_rows);
//pstmt.setInt(2,number);
rs=pstmt.executeQuery();
%>
<h1>分页数据显示</h1>
<table border=1>
<tr>
<td>id 号</td>
<td>Title</td>
<td>authors</td>
<td>publish_date</td>
</tr>
<%
while(rs.next()){
%>
<tr>
<td><%=rs.getString("id")%></td>
<td><%=rs.getString("title")%></td>
<td><%=rs.getString("authors")%></td>
<td><%=rs.getString("date")%></td>
</tr>
<%
}
%>
</table>
<a href="page.jsp?curpage=<%=1%>">第一页</a>
<%
if(curpage==1){
%>
上一页
<%
}else{
%>
<a href="page.jsp?curpage=<%=curpage-1%>">上一页</a>
<%
}
%>

<%
if(curpage==total_page){
%>
下一页
<%
}else{
%>
<a href="page.jsp?curpage=<%=curpage+1%>">下一页</a>
<%
}
%>
<a href="page.jsp?curpage=<%=total_page%>">最后一页</a>
</center>
</body>
</html>

临远 2008-05-31