forward.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!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>Insert title here</title>
</head>
<body>
<jsp:forward page="target.jsp">
<jsp:param value="1234" name="userName"/>
<jsp:param value="123456" name="password"/>
</jsp:forward>
</body>
</html>
target.jsp
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!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>Insert title here</title>
</head>
<body>
服务器内部跳转后的页面<br/>
userName:<%=request.getParameter("userName") %><br/>
password:<%=request.getParameter("password") %><br/>
</body>
</html>
原文：http://www.cnblogs.com/csy666/p/6422032.html