struts2 JSP取session问题

    String       user       =     ((com.mb.manage.vo.UserInfoVO)session.getAttribute("memberInfo")).getLoginID();              String       userID       =     ((com.mb.manage.vo.UserInfoVO)session.getAttribute("memberInfo")).getUserID();
               //out.println(user+","+userID);
    %>
       
     <s:if test='%{#session.memberInfo!=null}'>
        jjjjjjjjj
       <%=((com.mb.manage.vo.UserInfoVO)session.getAttribute("memberInfo")).getLoginID() %>     </s:if>--%>
       <s:if test='%{#session.memberInfo==null}'>
        kkkkkkkkkkkk
        </s:if>

          <s:if test='%{#session.memberInfo!=null}'>
           <a href='${pageContext.request.contextPath}/login/<%=((com.mb.manage.vo.UserInfoVO)session.getAttribute("memberInfo")).getLoginID() %>.html' target="_blank"><%=((com.mb.manage.vo.UserInfoVO)session.getAttribute("memberInfo")).getLoginID() %>！</a>欢迎来到商圈网！
                 <input type="hidden" id="userID" name="userVO.userID" value='<%((com.mb.manage.vo.UserInfoVO)session.getAttribute("memberInfo")).getUserID(); %>' />
                 [<a id="exitPath" href="#">退出</a>]
                  <script>
        var exitPath = document.getElementById('exitPath');
        exitPath.href = '${pageContext.request.contextPath}/member/quit_'+self.location.href+'/<%=((com.mb.manage.vo.UserInfoVO)session.getAttribute("memberInfo")).getLoginID() %>.html';
        </script>
                 </s:if>
                 <s:if test='%{#session.memberInfo==null}'>欢迎来到商圈网！[<a href="${pageContext.request.contextPath}/login.html" target="_blank">请登陆</a>]</s:if>  | <a href="${pageContext.request.contextPath}/register.html">注册</a></p>