一个简单的删除操作。删除不了，那里出问题了。
主页面代码
try{
Connection conn = DriverManager.getConnection("jdbc:odbc:Northwind","","");
Statement stmt = conn.createStatement();
String sql="Select * FROM Test order by id DESC";
//String str="insert into Test(title,message) values('"+title+"','"+message+"')";
//stmt.execute(str);
ResultSet rs = stmt.executeQuery(sql);


while(rs.next()){


%>

<table width="747" height="32" border="1" bordercolor="#ECE9D8">
<tr>
<td width="55"><%=rs.getString("id" )%></td>
<td width="156"><%=rs.getString("title" )%></td>
<td width="342"><%=rs.getString("message")%></td>
<td width="166"><a href="del.jsp?<%=rs.getString("id" )%>">删除 </a>　 　

<td width="166"><a href="upd.jsp">更新</a></td>
</tr>
</table>

<%}
rs.close();


删除页面代码：
try{
Connection conn = DriverManager.getConnection("jdbc:odbc:Northwind","","");
Statement stmt = conn.createStatement();
out.print("id");
String sql="delete from Test where id="+id;
stmt.executeUpdate(sql);

out.println("正在删除数据，请稍等。。。 。。。");
%>
<meta http-equiv="refresh" content="2;url=hejiao.jsp" />
<%

//stmt.execute(str);
//ResultSet rs = stmt.executeQuery(sql);
//rs.close();
stmt.close();
conn.close();
}
catch(Exception ex){
out.print(ex);
}
%>


[解决办法]
<td width="166"><a href="del.jsp?<%=rs.getString("id" )%>">删除 </a>　

这里，你没有把你的id传递过去啊~~

地址应该是这样：del.jsp?id=<%=rs.getString("id")%>

这样你可以从del.jsp中通过id获取过来。
[解决办法]
debug debug debug!