JSTL标签的使用

<c:if test="${not empty error}">   判断是否不为空

<c:if test="${empty error}">         判断是否为空

<c:if test="${mark  eq  '46'}">         判断字符是否相等

<c:if test="${mark  ==  46}">         判断数字是否相等

 

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 <c:when test=${}>标签必须要嵌套在<c:choose>标签中使用

 

  <c:choose>

        <c:when test="${empty QDrelationID}">//  当....时

                   <c:if test="${deptNum==0}">

 

               </c:if>
    </c:when>
    <c:otherwise> // 否则

 

</c:otherwise>

 

</c:choose>

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 <c:forEach items="${activityList }" var="item" varStatus="status">   //   集合activityList 遍历

      <tr >
          <td align="center" height="20" bgcolor="#FFFFFF" class="STYLE19">   //  顺序号
            &nbsp;${status.count}
          </td>
          <td height="20" bgcolor="#FFFFFF" class="STYLE19">
            &nbsp;${item.resourceName}
          </td>
          <td height="20" bgcolor="#FFFFFF" class="STYLE19">          
            &nbsp;${item.resourceIntro }
          </td>

       </tr>

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