<%
List list = (List)request.getAttribute("list");
for(int i = 0; i < list.size(); i++) {
Object obj [] = (Object [])list.get(i);
%>
<tr>
<td class="data_cell" style="text-align: center;"><%=obj[2] %></td>
</tr>
<%
}
%>
如果要累加<%=obj[2] %>这个值显示怎么办?