（1）往 Cookie 中存值：
<%@page import="javax.xml.ws.Response"%> <%@ page language="java" import="java.util.*" pageEncoding="gbk"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>Cookie的使用案例</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <% Cookie c1 =new Cookie("wth","wutiaohui"); //定义Cookie对象 Cookie c2 =new Cookie("soso","www.baidu.com"); //定义Cookie对象 response.addCookie(c1);//向客户端添加Cookie response.addCookie(c2); %> </body> </html>
（2）取出 Cookie 中的值 ：
<%@page import="javax.xml.ws.Response"%> <%@ page language="java" import="java.util.*" pageEncoding="gbk"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>Cookie的使用案例</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <% Cookie c[]=request.getCookies(); //获取全部的Cookie for(int i = 0 ;i <c.length;i++){ %> <h2><%=c[i].getName() %> ----> <%=c[i].getValue() %></h2> <% } %> </body> </html>
（2）对 Cookie 中的值 进行 时间设置 ：
<%@page import="javax.xml.ws.Response"%> <%@ page language="java" import="java.util.*" pageEncoding="gbk"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>Cookie的使用案例</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <% Cookie c1 =new Cookie("wth","wutiaohui"); //定义Cookie对象 Cookie c2 =new Cookie("soso","www.baidu.com"); //定义Cookie对象 c1.setMaxAge(15); //设置Cookie的有效时间为 15 秒 response.addCookie(c1);//向客户端添加Cookie response.addCookie(c2); %> </body> </html>
注意 ：
虽然，Cookie 中可以存放信息，但是并不是可以无限的保持，一般一个客户端最多只能保存300个 Cookie 所以数据量太大时 将无法使用 Cookie。