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 }