jsp页面上做判断

<div style="width:;">

<c:choose>

<c:when test="${item.alert_grade>0}"> //这个条件一定要写对，否则这个判断可能执行不了

<span style="color:red;font-weight:bold;padding-left:0px;"></span><br/>

<span style="color:bclack;font-weight:bold;padding-left: 20px;" id="edit_alert_action">

${item.alert_action }

</span>

</c:when>

<c:otherwise>

<span style="color:bclack;font-weight:bold;padding-left: 20px;">

<center>该预警没有对应的预案！</center>

</span>

</c:otherwise>

</c:choose>

</div>

</td></tr>

</table>

</form>

</div>