HttpServletRequest request=ServletActionContext.getRequest(); 
........
request.setAttribute("list", list);

#request.list

<!-- value代表一个集合List -->
    <s:iterator value="#request.list">
        <tr>
            <!-- 必须加“#”，不然取的是column.column -->
                        <!-- 必须加“#”，不然取的是column.column -->
            <td align="center"><s:property value="v_id" /></td>
            </td>
            <td align="center"><s:property value="v_name" /></td>
            </td>
        </tr>
    </s:iterator>