使用<bean:define >取到bean:write的值，并赋值给java变量

<logic:iterate id="item" name="list" type="com.worthtech.app.bean.Expense" indexId="index">
                <%
                int i =((java.lang.Integer)pageContext.findAttribute("index")).intValue();
                if((i%2)==0){//斑马线
                %>
                  <tr class="SelcetOff">
                <%}else{%>
                  <tr class="SelcetOn">
                <%}%>
                  <td><div align="center"><bean:write name="item" property="date"/></div></td>
                  <td><div align="center"><bean:write name="item" property="addtime"/></div></td>
                  
                   <bean:define id="var" name="item" property="addtime" type="java.lang.String"/>
                  <%
                  java.lang.String old=var;
                  java.lang.String now=com.worthtech.app.util.Util.getCurrentDate("yyyy-MM-dd");
                  int oldMonth=java.lang.Integer.parseInt(old.substring(5,7));
                  int oldDay=java.lang.Integer.parseInt(old.substring(8,10));
                  int nowMonth=java.lang.Integer.parseInt(now.substring(5,7));
                  int nowDay=java.lang.Integer.parseInt(now.substring(8,10));
                  if((nowMonth-oldMonth)*30+nowDay-oldDay>7){
                  %> 
                      <td><div align="center"><a href="expense.portal?action=view&backto=add&id=<bean:write name="item" property="id"/>" target="mainFrame">查看</a></div></td>
                  <%}else{ %>
                      <td><div align="center">
                        <a href="expense.portal?action=view&backto=add&id=<bean:write name="item" property="id"/>" target="mainFrame">查看</a>
                        <a href="expense.portal?action=update&backto=add&id=<bean:write name="item" property="id"/>" target="mainFrame">修改</a>
                      </div></td>
                  <% } %>
                </tr>
          </logic:iterate>