struts显示不了下拉框是咋回事

struts显示不了下拉框是怎么回事？

类别这一栏显示不了下拉框
jsp代码如下：

<tr>
          <td align="right">类别：</td>
          <td align="left">
          <logic:present name="cs" scope="request">
          	<select name="categoryId" id="categoryId">
	          	<logic:notEmpty name="cs" scope="request">
	          		<logic:iterate id="ele" name="cs" scope="request">
	          			<logic:equal value="${ele.id}" name="InfoForm" property="categoryId" >
		          			<option value="<bean:write name='ele' property='id' />" selected>
								<bean:write name="ele" property="title"/>
							</option>
						</logic:equal>
						<logic:notEqual value="${ele.id}" name="InfoForm" property="categoryId">
		          			<option value="<bean:write name='ele' property='id' />">
								<bean:write name="ele" property="title"/>
							</option>
						</logic:notEqual>
	          		</logic:iterate>
	          	</logic:notEmpty>
	          	<logic:empty name="cs" scope="request">
	          		<option value="-1" >没有添加类别</option>
	          	</logic:empty>
          	</select>
          </logic:present>
          </td>
        </tr>

Action类
// 添加信息

    public ActionForward add(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        Info med = null;
        // 获取MedicineForm
        InfoForm df = (InfoForm) form;
        InfoDao dao = new InfoDao();
         
        med = new Info();
        BeanUtils.copyProperties(med, df);
        CategoryDao cd = new CategoryDao();
        Category category = cd.loadCategory(df.getCategoryId());
        med.setCategory(category);
         
        dao.saveOrUpdate(med);
        return mapping.findForward("addSuccess");
    }

------解决思路----------------------
用 s:select 试试：

<s:select name="user.sex" list="#{'0':'男','1':'女'}" label="性别" headerKey="" headerValue="请选择性别"></s:select>