JSP之response关于Cookie实战

妖狐艹你老母 2021-07-24 20:11 384阅读 0赞

**一 实战1**

1 向客户端写Cookie

2 从客户端读Cookie

3 测试

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1][]

**二 实战2——中文Cookie**

1 代码

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title> 中文Cookie </title>
        <meta name="website" content="http://www.crazyit.org" />
    </head>
    <body>
    <%
    // 以编码后的字符串为值，创建一个Cookie对象
    Cookie c = new Cookie("cnName"
        , java.net.URLEncoder.encode("孙悟空" , "gbk"));
    // 设置Cookie对象的生存期限
    c.setMaxAge(24 * 3600);
    // 向客户端增加Cookie对象
    response.addCookie(c);
    
    // 获取本站在客户端上保留的所有Cookie
    Cookie[] cookies = request.getCookies();
    // 遍历客户端上的每个Cookie
    for (Cookie cookie : cookies)
    {
        // 如果Cookie的名为username，表明该Cookie是需要访问的Cookie
        if(cookie.getName().equals("cnName"))
        {
            //使用java.util.URLDecoder对Cookie值进行解码
            out.println(java.net.URLDecoder
                .decode(cookie.getValue()));
        }
    }
    %>
    </body>
    </html>

2 测试

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 2][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/c36aaa41a8cc47c1abdb8693099ebc30.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 1]: /images/20210724/b1f69f4aff3d4de9924fdfaeb2dc757d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70 2]: /images/20210724/e154a6623a8e4d58ae03c8ad276f7a87.png