JAVA中对Cookie的操作

（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="">

    <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="">

    <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 =  ;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="">

    <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(); //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。

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JAVA中对Cookie的操作

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