HTTP Status 500 - /jsp1/Department/list.jsp (line: 57, column: 88) Attribute vaule invalid for tag property according to TLD

? ?這是第57行 感覺是<s:property vaule="currPage-1"/>無效 ?

?<a href="${pageContext.request.contextPath}/department_findAll.action?currPage=<s:property vaule="currPage-1"/>">[上一頁]</a>&nbsp;&nbsp;