jsp怎么在程序塊里用forward傳值？

index.jsp<%@ page language="java" pageEncoding="GBK"%> <jsp:forward page="in.jsp"> <jsp:param name="aa" value="bb"/> <jsp:param name="aa11" value="bb11"/> </jsp:forward> in.jsp<%@ page language="java" pageEncoding="GBK"%> <% String aa=request.getParameter("aa"); String aa11=request.getParameter("aa11"); %> <%=aa %><br> <%=aa11 %><br>