servlet类：
package Control;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
-
Servlet implementation class Demoo
*/
@WebServlet(name="Demoo",urlPatterns = { "/Demoo"})
public class Demoo extends HttpServlet {
private static final long serialVersionUID = 1L;protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stubString a="aaaaaaa"; request.setAttribute("aa",a); request.getRequestDispatcher("a.jsp").forward(request, response);}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
//doGet(request, response);}
}
jsp：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="Beans.*,java.util.*"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
Insert title here
<p>传值：</p>
<p>${aa}</p>
<%=request.getAttribute("aa")%>
