这工作：
<div id="displayFields"> <table > <tr> <td> <c:forEach items="${detFieldMap}" var="detFieldEntry" varStatus="loop"> <c:if test="${not loop.first and loop.index % 5 == 0}"> </td> </tr> <tr> <td> </c:if> <fieldset ><legend>${detFieldEntry.key}</legend> <c:forEach items="${detFieldEntry.value}" var="detBean"> <input type="checkbox" name="fieldNames" value="${detBean.fieldName}" <c:if test="${preselectionMap[detBean.fieldName]}">checked="checked"</c:if>>${detBean.displayName}</input> </br> </c:forEach> </fieldset> </c:forEach> </td> </tr> </table></div>
