Strange question about cookie

Question

jsp page 1 create a cookie and send it to browser,then forward to jsp page 2,
jsp page 2 can read cookie successfully,and jsp page 2 link to jsp page 3,
but in jsp page 3,cookie can't be read yet,why?
Anybody have experience like to tell me?

Answer 1

Thx.I have solved the problem.
The reason jsp page 3 can't read cookie is cookie has the
property "path",the application write and the application read
the cookie must be at the same path,otherwise it failed to read.
If they are at the different path,you must use cookie.setPath()
method to set the path which the application read is at before
you write the cookie.
The other thing I found is forward() will not change the path,
so why the jsp 2 can read the cookie.
once you added a cookie to your response, then any
resource in your application should be able to read it
and retrieve it's value, because actually it is going
to be stored at the client local drive. maybe you
should be sure about the age of the cookie i.e
Cookie userCookie = new Cookie("cookiename",
"cookie_value");
userCookie.setMaxAge(60*60*24*365); // 1 year,
setMaxAge in seconds
response.addCookie(userCookie);
so maybe if you try to set the max age of the cookie
it would work
regards