Chapter 8. @CookieParam

The @CookieParam annotation allows you to inject the value of a cookie, or an object representation of an HTTP request cookie, into your method invocation. 
  GET /books?num=5


   @GET
   public String getBooks(@CookieParam("sessionid") int id) {
   ...
   }

   @GET
   public String getBooks(@CookieParam("sessionid") javax.ws.rs.core.Cookie id) {...}
As with @PathParam, the type of parameter can be a primitive, a String, or a class with a String constructor or static valueOf() method. You can also get an object representation of the cookie via the javax.ws.rs.core.Cookie class.