<table>
<%
   while(iter.hasNext())
{
                 map = (Map)iter.next() ;                 String s1 = map.get("数据库字段A") ;
                 String s2 = "";
                 if(iter.hasNext()) {
                     map = (Map)iter.next() ;
                     s2= map.get("数据库字段A") ;
%>
<tr>
<td><%=s1%></td>
<td><%=s2%></td>
</tr>
<%                     
                 }
%>
</table>