Getting cookie in servlet

Question

I\'m trying to get cookie in servlet using

Cookie[] cookie = request.getCookies();

but cookie is always null.

Answer 1

firstly ,you should create a cookie,and then add to response

Cookie cookie = new Cookie(name,value);
response.addCookie(cookie);

Answer 2

SET COOKIE

  Cookie cookie = new Cookie("cookiename", "cookievalue");
  response.addCookie(cookie);

GET COOKIE

  Cookie[] cookies = request.getCookies();
  if(cookies != null) {
      for (int i = 0; i < cookies.length; i++) {
          cookie=cookies[i]
          String cookieName = cookie.getName();
          String cookieValue = cookie.getValue();
       }
   }

Answer 3

I had the same problem and discovered the cause in my case was that I was using the browser built into Eclipse. This does not accept cookies. When I accessed the same JSP from chrome, it worked. Perhaps you are doing the same thing I did?

It may also be the case that the browser you are using or your internet settings are set to reject cookies. Hope this helps you or any other visitor experiencing the same issue.

Answer 4

According to docs getCookies() Returns an array containing all of the Cookie objects the client sent with this request. This method returns null if no cookies were sent.

Did you add the cookie correctly? If yes, you should be able to iterate through the list of cookies returned with

Cookie[] cookies = request.getCookies();

for (int i = 0; i < cookies.length; i++) {
  String name = cookies[i].getName();
  String value = cookies[i].getValue();
}

If no...

Cookies are added with the addCookie(Cookie) method in the response object!

Answer 5

Are you sure the client supports cookies? because if it is configure to NOT accept cookies, you will never get them back on a following request...