cookies 顯示用戶上次訪問的時間 學習筆記
阿新 • • 發佈:2018-04-18
cookies 顯示用戶上次訪問的時間Cookie.setMaxAge(72460*60)
Cookie.setPath(“/day0X”);
Httpwatch觀察
Cookie.setMaxAge(0)刪除同名Cookie
import java.io.IOException; import java.util.Date; import javax.servlet.ServletException; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /* * http://localhost:8080/day07/Demo2?name=jack回車 */ public class Demo2 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException { String name = request.getParameter("name"); if(name==null){ name="default"; } //取得客戶端的所有Cookie的值 Cookie[] cookies = request.getCookies(); if(cookies==null){ Cookie cookie = new Cookie("name_"+name,System.currentTimeMillis()+""); cookie.setMaxAge(1*24*60*60); response.addCookie(cookie); response.setContentType("text/html;charset=UTF-8"); response.getWriter().write("歡迎"+name+"首次光臨,訪問時間:" + new Date().toLocaleString()); }else{ //查找名為name的Cookie Cookie nameCookie = null; for(Cookie c : cookies){ if(c.getName().equals("name_"+name)){ nameCookie = c; break; } } //找到了 if(nameCookie!=null){ String strTime = nameCookie.getValue(); response.setContentType("text/html;charset=UTF-8"); long lastTime = Long.parseLong(strTime); response.getWriter().write("歡迎"+name+"再次光臨,你上次訪問時間:" + new Date(lastTime).toLocaleString()); //更新時間 Cookie cookie = new Cookie("name_"+name,System.currentTimeMillis()+""); cookie.setMaxAge(1*24*60*60); response.addCookie(cookie); } } } }
cookies 顯示用戶上次訪問的時間 學習筆記