我做毕业设计,其它的都能做好,就分页做不出来,一页显示记录太多,特别别扭.网上看了不少,却总看不懂,弄得寝食难安,请高手帮帮忙.代码最好注释一下
非常感谢!
如果代码太长,可以发送到
非常感谢!
如果代码太长,可以发送到
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<%@page import="java.sql.*"%>
<html>
<body>
<%
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver").newInstance();
String url="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=student";
String user="sa";
String password="command";
Connection conn=DriverManager.getConnection(url,user,password);
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
String sql;
int pagecount=0;//总页数
int pagesize=4;//一页4行记录
int showpage=1;//默认显示页为第一页
int recordcount=0;//总记录数
String topage=request.getParameter("topage");
if(!(topage==null))
showpage=Integer.parseInt(topage);
sql="select count (*) recordcount from T_Student";
ResultSet rs=stmt.executeQuery(sql);
rs.next();
recordcount=rs.getInt("recordcount");
pagecount=(recordcount+pagesize-1)/pagesize;
if(showpage>pagecount)
showpage=pagecount;
else if(showpage<=0)
showpage=1;
sql="SELECT TOP "+pagesize +" * FROM T_Student WHERE (xh NOT IN (SELECT TOP "+(showpage-1)*pagesize +" xh FROM T_Student ORDER BY xh)) ORDER BY xh";
rs=stmt.executeQuery(sql);
%><form action="#"> //就是跳转到本页,也可以不写,默认是本页
<table cellspacing="0" cellPadding="3" border=1 bordercolor="#B0B0B0" rules="all" width="100%">
<tr bgcolor="#6699FF">
<td>学号</td>
<td>姓名</td>
<td>性别</td>
</tr>
<%
while(rs.next()){
%>
<tr>
<td><%=rs.getString(1)%> </td>
<td><%=rs.getString(2)%> </td>
<td><%=rs.getString(3)%> </td>
</tr>
<%}%>
</table>
<table cellspacing="0" cellPadding="3" border=1 bordercolor="#B0B0B0">
<tr>
<td>
<a href="index.jsp?topage=<%=1%>">第一页</a>
<a href="index.jsp?topage=<%=showpage-1%>">上一页</a>
<a href="index.jsp?topage=<%=showpage+1%>">下一页</a>
<a href="index.jsp?topage=<%=pagecount%>">最后一页</a>
<span><input name="topage" type="text" class="txt_grey" value="<%=showpage%>"></span>
</td>
</tr>
</table>
<%
rs.close();
stmt.close();
conn.close();%>
</form>
</body>
</html>
<%@ page contentType="text/html; charset=GBK"%>
<%@ page import="java.sql.*"%>
<%
int pagesize=2;//每页显示记录数
int recordcount=0;//记录总数
int pagecount=0;//总页数
int pageid=1;//待显页码
Connection conn=null;
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
conn=DriverManager.getConnection("jdbc:odbc:jspguest","sa","sa");
Statement stmt=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
String sql="select * from message";
ResultSet rs=stmt.executeQuery(sql);
rs.last();
recordcount=rs.getRow();//取得总记录数
pagecount=(recordcount%pagesize==0?(recordcount/pagesize):(recordcount/pagesize)+1);//取得总页数
int count=1;
String strpage=request.getParameter("pageid");
if(strpage==null) pageid=1;
else pageid=Integer.parseInt(strpage);
if(pageid>recordcount) pageid=recordcount;
if(recordcount>0){
rs.absolute((pageid-1)*pagesize+1);}
int i=0;
//rs.previous();
rs.beforeFirst();
while(rs.next()&&count<=pagesize){
count++;
i++;
out.print(rs.getString("name"));
out.print("||");
out.print(rs.getString("title"));
out.print("<br/>");
}
out.print("共");
out.print(pagecount);
out.print("页");
out.print("共");
out.print(recordcount);
out.print("条");
out.print("第");
out.print(pageid);
out.print("页");
out.print("<br/>");
if(pageid<pagecount){
out.print("<a href=del.jsp?pageid=");
out.print(pageid+1);
out.print(">下一页</a>");}
if(pageid>1){
out.print("<a href=del.jsp?pageid=");
out.print(pageid-1);
out.print(">上一页</a>");}
out.print("<br/>");
for(int j=1;j<=pagecount;j++){
out.print("<a href=del.jsp?pageid=");
out.print(j);
out.print(">");
out.print(j);
out.print("</a>");}
stmt.close();
conn.close();
}
catch(ClassNotFoundException e){
out.println(e.getMessage());
}
catch(SQLException e) {
out.println(e.getMessage());
}
finally{
try{
if(conn != null)
conn.close();
}
catch(Exception e){}
}
%>
把连接字符串改一下就好了
size 表示 返回行数 就是 每页显示多少记录begin = (page-1)*size
int PageSize=10,i=0,RowCount=0,PageCount;
int GetPage=Chk.IsPage(request.getParameter("page"));
ResultSet RSs=Conn.executeQuery("Select Count(SID) As s From comments where SID ="+ID);
if(RSs.next()){
RowCount=RSs.getInt("s");
}
PageCount = (RowCount+PageSize-1) / PageSize;
if(GetPage>PageCount) GetPage = PageCount;
int p=(GetPage-1)*PageSize;
String sqlComment="Select * From comments where SID = "+ID+" Order By ID ASC limit "+p+","+PageSize+"";
见:http://www.family168.com/tutorial/jsp/html/jsp-ch-15.html
<!--
function MM_openBrWindow(theURL,winName,features) { //v2.0
window.open(theURL,winName,features);
}
//-->
</script>
<script>
function openbag(id) { window.open("basket.jsp?id="+id,"","height=420,width=460,left=190,top=10,resizable=yes,scrollbars=yes,status=no,toolbar=no,menubar=no,location=no");}
</script>
<table border=0 align="center" cellpadding=0 cellspacing=1>
<tr bgcolor="#E6E6E6">
<th width="251">图书名称</th>
<th width="111">出版社</th>
<th width="112">定价</th>
<th colspan="2">日期</th>
</tr>
<%
//public bs=rs.getString("leiID");
int intPageSize; //一页显示的记录数
int intRowCount; //记录总数
int intPageCount; //总页数
int intPage; //待显示页码
String strPage,lei;
int i;
//设置一页显示的记录数
intPageSize =15;
//取得待显示页码
strPage = request.getParameter("page");
lei = request.getParameter("lei"); //图书类别
if(lei==null){
lei="1";
}if(strPage==null){//表明在QueryString中没有page这一个参数,此时显示第一页数据
intPage = 1;
} else{//将字符串转换成整型
intPage = java.lang.Integer.parseInt(strPage);
}sql="select * from tushumingxi where lieID="+java.lang.Integer.parseInt(lei);
Statement selstmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs=selstmt.executeQuery(sql);
if(intPage< 1){
intPage = 1;
}
//获取记录总数
rs.last();
intRowCount = rs.getRow();
//记算总页数
intPageCount = (intRowCount+intPageSize-1) / intPageSize;
//调整待显示的页码
if(intPage >intPageCount) intPage = intPageCount;
if(intPageCount >0){
//将记录指针定位到待显示页的第一条记录上
rs.absolute((intPage-1) * intPageSize+1);
//显示数据
}
i = 0;
while(i< intPageSize && !rs.isAfterLast()){
int bkid=rs.getInt("shuID");
%>
<tr valign="middle" bgcolor="#f8f8f8" height="25">
<td width="251" bgcolor="#f8f8f8" ><a href=# onClick="MM_openBrWindow('browbook.jsp?id=<%=bkid%>','','width=400,height=550')"><%=rs.getString("shu_name")%></a></td>
<td><%=rs.getString("banshe")%></td>
<td><div align="center">¥<%=rs.getString("dingjia")%>元</div></td>
<td width="114"><%=rs.getString("date")%></td>
<td width="34" align="center"><a href="javascript:MM_openBrWindow('basket.jsp?id=<%=bkid%>','','scrollbars=yes,width=480,height=350')"><img src="image/04dd_car.gif" width="19" height="16" border="0"></a></td>
</tr>
<tr>
<td height=1 colspan="5" background="image/dian.gif"><img src="images/blank.gif" width=1 height=1></td>
</tr>
<%rs.next();
i++;
} rs.close();
selstmt.close();
conn.close();%>
</table>
<p align="center">
共<%=intRowCount%>个记录,分<%=intPageCount%>页显示,您所在本页是:第<%=intPageCount%>页
<%for(int j=1;j<=intPageCount;j++)
{out.print(" <a href='language.jsp?lei="+lei+"&page="+j+"'>"+j+"</a>");
}%>我以前写的代码!记得加分啊