first.jsp
<%@ page contentType="text/html;charset=UTF-8"%>
<html>
<body>
<form method=POST action="next.jsp">
请输入用户名：
<input type=text name="name">
<input type=submit value="下一步">
</form>
</body>
</html>
next.jsp
<%@ page contentType="text/html;charset=UTF-8"%>
<html>
<body>
<%@ page language="java"%>
<%! String name="";%>
<%
name=request.getParameter("name");
session.putValue("name",name);
response.setHeader("refresh", "1;url=last.jsp");
%>
</body>
</html>
last.jsp
<%@ page contentType="text/html;charset=UTF-8"%>
<html>
<body>
<%@ page language="java"%>
<%
request.setCharacterEncoding("UTF-8");
String username=(String) session.getValue("name");
out.print("您好："+username+"<a href=first.jsp>注销</a>");
%>
</body>
</html>
原文：http://www.cnblogs.com/guaihaizi/p/4071234.html