...
radio单选框 + <c:if 标签判断是否选中
<div>
<label >用户类别:</label>
<c:forEach items="${userRole}" var="role" varStatus="u">
<input type="radio" name="userRole" value="${role.id}"
<c:if test="${userUpdate.get('userRole') eq role.roleName}">checked="checked"</c:if>
/>${role.roleName}
</c:forEach>
</div>