1 import javax.servlet.ServletException;
2 import javax.servlet.http.Cookie;
3 import javax.servlet.http.HttpServlet;
4 import javax.servlet.http.HttpServletRequest;
5 import javax.servlet.http.HttpServletResponse;
6 import java.io.IOException;
7 import java.io.PrintWriter;
8 import java.util.Date;
9
10 public class CookieDemo01 extends HttpServlet {
11 @Override
12 protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
13 //解决中文乱码
14 req.setCharacterEncoding("utf-8");
15 resp.setCharacterEncoding("utf-8");
16
17 PrintWriter out = resp.getWriter();
18
19 Cookie[] cookies = req.getCookies();
20
21 if (cookies != null){
22 out.write("您上次访问的时间是：");
23 for (int i = 0; i < cookies.length; i++) {
24 Cookie cookie = cookies[i];
25 if (cookie.getName().equals("LastLoginTime")){
26 long lastLoginTime = Long.parseLong(cookie.getValue());
27 Date date = new Date(lastLoginTime);
28 out.write(date.toLocaleString());
29 }
30 }
31 }else {
32 out.write("这是您第一次访问本站");
33 }
34
35 Cookie cookie = new Cookie("LastLoginTime", System.currentTimeMillis()+"");
36 resp.addCookie(cookie);
37 }
38
39 @Override
40 protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
41 doGet(req, resp);
42 }
43 }
