JAVA²Ù×÷cookie

È¡:
Cookie[] cookies = request.getCookies();
 if(cookies!=null){
    for(Cookie cookie : cookies){
   if(cookie.getName().equals("mid")){
    String mid = cookie.getValue();
   }
  }
 }
´æ:
String mid = java.net.InetAddress.getLocalHost().getHostName();
  Cookie c = new Cookie("mid",mid);
//ÉèÖÃcookie´æ·ÅÔÚÓ²ÅÌÉϵÄʧЧʱ¼ä,ÒÔÃëΪµ¥Î»,Èç¹û²»ÉèÖûòÉèÖÃΪ¸ºÊý,Ö»´æÔÚÓÚä¯ÀÀÆ÷»º´æ,Í˳öä¯ÀÀÆ÷´ËcookieʧЧ,²»»áдÈëÓ²ÅÌ.
//Èç¹ûÉèÖÃΪ0,Ôò»áɾ³ý´Ëcookie. ͨ¹ýfirefox cookie²é¿´Æ÷,´Ëcookie²¢Î´É¾³ý,²»ÖªÊǺÎÔ­Òò.ËƺõºÍÉèÖøºÊýûʲôÇø±ð.
c.setMaxAge(60*3);
//ÉèÖÃcookie´æ·ÅµÄpath,ÉèÖÃÁË´Ëpath,ÇëÇóµÄurl°üº¬´Ëpath(µ±È»ÓòÃûҲҪƥÅä)¶¼¿ÉÒԵõ½´Ëcookie.·ñÔò²»Äܵõ½.
  c.setPath("/");
//ÉèÖÃcookie´æÈëµÄÓòÃû,Èç¹ûÉèÖÃΪ.test.com»òtest.com,ÔòÒÔ´ËÓòÃû½áβµÄurlÇëÇóʱ¶¼¿ÉµÃµ½´Ëcookie(µ±È»pathҲҪƥÅä),·ñÔò²»Äܵõ½.Èç¹û²»ÉèÖÃÓòÃû,ÒÔµ±Ç°ÇëÇóµÄÓòÃûΪ׼.
²»¿ÉÒÔÉèÖõ½µ±Ç°ÇëÇóµÄÓòÃûÖ®ÍâµÄÓòÃû,ÉèÖÃÁ˽«»áÎÞЧ. Èçrequest urlΪhttp://www.test.com,ÉèÖÃcookieдÈëµÄÓòÃûΪwww.xuelong.comÔòÎÞЧ,²»»áдÈë.
  c.setDomain("www.test.com");
  response.addCookie(c);
ÒÔÉÏÊÇ×Ô¼º¾­¹ý²âÊԵóöµÄ½áÂÛ,»¹Óдý֤ʵ.