Jsp Cookie的创建与读取 标签： cookiejsp 2016-11-17 15:14 61人阅读 评论(0)

时间：2023-11-10 13:07:20

Cookie.jsp

<%@ page language="Java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<html>

  <head>

    <base href="<%=basePath%>">

    <title>创建Cookie</title>

  </head>

  <body>

   <%

     // 创建一个Cookie,包括(key,value).

     Cookie cookie = new Cookie("cookieName", "cookieValue");

     // 设置Cookie的生命周期,如果设置为负值的话,关闭浏览器就失效.

     cookie.setMaxAge(60*60*24*365);

     // 设置Cookie路径,不设置的话为当前路径(对于Servlet来说为request.getContextPath() + web.xml里配置的该Servlet的url-pattern路径部分)

     // cookie.setPath("/"); 

     // 输出Cookie

     response.addCookie(cookie);

    %>

    已创建Cookie. <br>

   <a href="ShowCookie.jsp">查看Cookie</a>

  </body>

</html>

ShowCookie.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<html>

  <head>

    <base href="<%=basePath%>">

    <title>读取客户端的Cookie信息</title>

  </head>

  <body>

    读取客户端的Cookie信息. <br>

   <%

     // 获得当前路径以及"直接父路径"的所有Cookie对象,如果没有任何Cookie的话,则返回null

     Cookie[] cookies = request.getCookies();

     // 遍历数组,获得具体的Cookie

     if(cookies == null) {

        out.print("没有Cookie信息");

     } else {

         for(int i=0; i<cookies.length; i++) {

            // 获得具体的Cookie

            Cookie cookie = cookies[i];

            // 获得Cookie的名称

            String name = cookie.getName();

            String value = cookie.getValue();

            out.print("Cookie名:"+name+" &nbsp; Cookie值:"+value+"<br>");

         }

     }

    %>

  </body>

</html>

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