报错找不到command

<c:forEach items=" ${messageList}" var="message"  varStatus="status">

<tr <c:if test="${status.index%2!=0}">style="background-color:#ECF6EE;"</c:if>>

<td><input type="checkbox" /></td>

<td>${status.index+1}</td>

<td>${message.command}</td>

<td>${message.description}</td>

<td><a href="#">修改</a>&nbsp;&nbsp;&nbsp; <a href="#">删除</a>

</td>

</tr>

</c:forEach>

报错javax.el.PropertyNotFoundException: Property 'command' not found on type java.lang.String

没有什么空格问题