request属性范围表示在服务器跳转后，所有设置的内容依然会被保留下来。（服务器端跳转：页面跳转，地址栏不发生变化）
下面写个小例子测试下：
(1)request_demo.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" errorPage="" %>
<%@ page import="java.util.*"%>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>page属性范围</title>
</head> <body>
<%
request.setAttribute("name","ninic");
request.setAttribute("birthday",new Date());
%>
<jsp:forward page="request_demo2.jsp"/>
</body>
</html>
(2)request_demo2.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.util.*" errorPage="" %>
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>无标题文档</title>
</head> <body>
<%
String username=(String)request.getAttribute("name");
Date userbirthday=(Date)request.getAttribute("birthday");
%>
<h2>姓名：<%=username%></h2>
<h2>生日：<%=userbirthday%></h2>
</body>
</html>
浏览器中显示：