java cookie的有效期_Java Web cookie的有效期

最新推荐文章于 2023-11-04 19:50:10 发布

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#java cookie的有效期

本文详细解析了JavaWeb中cookie的生命周期管理，包括后台如何添加cookie，未显式设置有效期的默认行为，以及如何通过setMaxAge方法设置有效期，单位为秒。重点介绍了如何通过不同的参数控制cookie的持久性和过期时间。

Java Web中cookie中的有效期

(1)Java Web后台添加cookieCookie emailCook = new Cookie(name2, "whuang");

emailCook.setPath("/");

response.addCookie(emailCook);

(2)没有显式设置有效期,则有效期为session,即关闭浏览器之后就失效

(3)设置有效期:emailCook.setMaxAge(10000000);

response.addCookie(emailCook);

setMaxAge 的单位是:秒public void setMaxAge(int expiry)Sets the maximum age of the cookie in seconds.

A positive value indicates that the cookie will expire after that many seconds have passed. Note that the value is the maximum age when the cookie will expire, not the cookie‘s current age.

A negative value means that the cookie is not stored persistently and will be deleted when the Web browser exits. A zero value causes the cookie to be deleted.

Parameters:

expiry - an integer specifying the maximum age of the cookie in seconds; if negative, means the cookie is not stored; if zero, deletes the cookie