<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
first.jsp
First
Session ID=<%=session.getId()%>
test = <%=session.getAttribute("test")%>
test2 = <%=session.getAttribute("test2")%>
<%
session.setAttribute("test2","test2");
%>
test2 confirm = <%=session.getAttribute("test2")%>