重定向不适用于Spring MVC表单

Question

<form:form>   

  <%
     String applicationId=(String)session.getAttribute("appId");
     String serviceId=(String)session.getAttribute("servId");
     String mineralIdAndName=(String)session.getAttribute("mineralIdAndName");

     response.sendRedirect("updateStock.com?appId="+applicationId+"&serviceId="+serviceId+"&mineralIdAndName="+mineralIdAndName);%>

<form:form>

此代码无效请咨询我。