Java Web cookie的有效期

Java Web中cookie中的有效期
(1)Java Web后台添加cookie

Cookie 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