c:if标签数据回显判断是否选中

<form action="/brand/list.do" method="post" style="padding-top:5px;">
品牌名称: <input type="text" name="name" value="${name }"/>
<select  name="isDisplay" >
<option value="1"  <c:if test="${isDisplay==1 }"> selected="selected"</c:if> >是</option>
<option value="0" <c:if test="${isDisplay==0 }"> selected="selected"</c:if>  >否</option>
</select>
<input type="submit" class="query" value="查询"/>
</form>