这样试试，如果还不行，那就是你的JDBC版本不支持这种方法了。
strm2 = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE) ;
rs1=strm2.executeQuery(sql_str) ;
strm2 = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE) ;
rs1=strm2.executeQuery(sql_str) ;
因为我自己机器上是可以的啊，而且上传的第一天显示是很正常的，第二天就变了！
郁闷~~~~~~~~~~~
up
<%@ page language="java" import="java.sql.*"%>
<%@ page contentType="text/html;charset=gb2312"%>
<jsp:useBean id="DB" scope="page" class="bbs.Mysql" />
<%
//以下三行清除缓存，每次进入该页面自动刷新
response.setHeader("progma","no-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires",0);
int pagesize; //每页记录数
int rowcount; //总记录数
int pagecount; //总页数
int pages; //当前页码
String strpage; //传递参数变量
String sql=""; //查询语句
String title="";
pagesize=20;
rowcount=0; //初始化
strpage=request.getParameter("page");
if(strpage==null){
pages=1;
}else{
pages=java.lang.Integer.parseInt(strpage);
if (pages<1) pages=1;
}
sql="select count(*) as count from forum where rootid=0";
ResultSet rs=DB.executeQuery(sql);
if (rs.next()){
rowcount=rs.getInt("count"); //得到总主贴数
}
pagecount=(rowcount+pagesize-1)/pagesize; //计算总页数
if (pages>pagecount){
pages=pagecount;
rs.close();
} //对于大于总页数的页面调整为最大页数
%>
<html>
<head>
<title>欢迎来到在线学习论坛</title>
</head>
<body background="image/bbg.gif">
<table width="100%" border="1" cellpadding="0" cellspacing="0" bordercolordark="#FFFFFF" bordercolorlight="#000000">
<tr>
<td bgcolor="#0099ff" height="16"> <font color="#FFFFFF">在线学习论坛 <a href="login.html"><font color="#FFFFFF">登录</font></a>
<a href="reg.html"><font color="#FFFFFF">注册</font></a> <a href="loginout.jsp"><font color="#FFFFFF">注销</font></a></font></td>
</tr>
</table>
<p> </p>
<table width="25%" border="0" align="right">
<tr>
<td><font color="#0000FF"><a href="addtitle.jsp">发表新贴</a></font></td>
</tr>
</table>
<form name="form1" method="post" action="search.jsp">
按
<select name="select" size="1">
<option value="writer" selected>作者
<option value="title">主题
</select>
<input type="text" name="text">
<input type="submit" name="Submit" value="搜索">
</form>
<table width="100%" border="0">
<tr bgcolor="#0099ff">
<td align=center width=10% height="34"><font color="#FFFFFF"><b>编号</b></font></td>
<td align=center width=46% height="34"><font color="#FFFFFF"><b>讨论区</b></font></td>
<td align=center width="12%" height="34"><font color="#FFFFFF"><b>发言人</b></font></td>
<td align=center width="12%" height="34"><font color="#FFFFFF"><b>回复数</b></font></td>
<td align=center width="20%" height="34"><font color="#FFFFFF"><b>最后更新时间</b></font></td>
</tr>
<%
sql="select * from forum where rootid=0 order by lastupdatetime DESC";
ResultSet rs1=DB.executeQuery(sql); //得到主贴记录集
//显示记录
if(rowcount>0){
rs1.absolute((pages-1)*pagesize+1);
int i=0;
while ((i<pagesize)&&(!rs1.isAfterLast())){
title=rs1.getString("title");
if (title.length()>50) {
title=title.substring(0,49)+"...";}
%>
<tr>
<td align=center width=10% height="34"><font color="#000063"><%=rs1.getInt("id")%></font></td>
<td align=left width=46% height="34"><font color="#0099ff"><a href=forumcontent.jsp?id=<%=rs1.getInt("id")%>><%=title%></a></font></td>
<td align=center width="12%" height="34"><font color="#000063"><%=rs1.getString("writer")%></font></td>
<td align=center width="12%" height="34"><font color="#000063"><%=rs1.getInt("replynum")%></font></td>
<td align=center width="20%" height="34"><font color="#000063"><%=rs1.getString("lastupdatetime")%></font></td>
</tr>
<%
rs1.next();
i++;
}
}
%>
</table>
<hr color="#0099ff">
</body>
</html>
<%
rs1.close();
%>