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 }

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