request的setAttribute方法确实能够多页传值和多页取值的，因为request完成的是服务器跳转，在这期间所有设置的内容会被保存下来。下面的例子包含4个页面，1page.jsp和2page.jsp完成的是页面多次传值，3page.sjp和4page.jsp完成的是页面多次取值，直到页面显示出来，url一直是1page.jsp，说明这是服务器跳转。
1page.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<%
request.setAttribute("name","zhangsan");
%>
<body>
<jsp:forward page="2page.jsp"/>
</body>
</html>
2page.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>无标题文档</title> </head> <body> <jsp:forward page="3page.jsp"/> </body> </html>
3page.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<%=request.getAttribute("name")%>
<jsp:forward page="4page.jsp"/>
</body>
</html>
4page.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
</head>
<body>
<%=request.getAttribute("name")+" in 4page.jsp"%>
</body>
</html>
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