session对象

 1 package cn.itcast.cookie;
 2 
 3 import java.io.IOException;
 4 import java.io.PrintWriter;
 5 
 6 import javax.servlet.ServletException;
 7 import javax.servlet.http.Cookie;
 8 import javax.servlet.http.HttpServlet;
 9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11 import javax.servlet.http.HttpSession;
12 
13 public class SessionDemo extends HttpServlet {
14 
15     public void doGet(HttpServletRequest request, HttpServletResponse response)
16             throws ServletException, IOException {
17 
18         HttpSession session = request.getSession();
19 
20         String sessionid = session.getId();
21         Cookie cookie = new Cookie("JSESSIONID", sessionid);
22         cookie.setPath("/ServletDemo");
23         cookie.setMaxAge(30 * 60);
24         response.addCookie(cookie);
25         session.setAttribute("name", "洗衣机");
26 
27     }
28 
29     public void doPost(HttpServletRequest request, HttpServletResponse response)
30             throws ServletException, IOException {
31 
32     }
33 
34 }

 1 package cn.itcast.cookie;
 2 
 3 import java.io.IOException;
 4 import java.io.PrintWriter;
 5 
 6 import javax.servlet.ServletException;
 7 import javax.servlet.http.HttpServlet;
 8 import javax.servlet.http.HttpServletRequest;
 9 import javax.servlet.http.HttpServletResponse;
10 import javax.servlet.http.HttpSession;
11 
12 public class SessionDemo2 extends HttpServlet {
13 
14     
15     public void doGet(HttpServletRequest request, HttpServletResponse response)
16             throws ServletException, IOException {
17 
18         response.setCharacterEncoding("UTF-8");
19         response.setContentType("text/html;charset=UTF-8");
20         PrintWriter out = response.getWriter();
21         
22         HttpSession session = request.getSession();
23         String product = (String) session.getAttribute("name");
24         
25         out.print("您购买的商品是："+product);
26         
27     }
28 
29     
30     public void doPost(HttpServletRequest request, HttpServletResponse response)
31             throws ServletException, IOException {
32 
33         
34     }
35 
36 }