男人和女人间那点不得不捅破的事---非原创，转自某知名博客

              <bean:size id="len" name="ProjectBillForm" property="resultList" />
              <logic:greaterThan name="len"  value="0">
                 <input type="button" name="button" value="<bean:message key="queryBill_projectBillQuery_18"/>" class="button"   onclick="changeProjectStatusByLinks();"/>
                 <input type="button" name="button" value="<bean:message key="EPM.1975400"/>" class="button" onclick='exportExcel();'>
              </logic:greaterThan>