java设置cookie，存储和读取

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/**【【【【【【【【【【这里是存储的一种方式】】】】】】】】】】】】】 * 设置cookie：根据用户的选择设置默认树 * 将设置的axis的value存入cookie */@RequestMapping(value="default_axis.jspx")public String setDefault_docTree(HttpServletRequest request,HttpServletResponse response,HttpSession session){RequestProxy proxy = RequestProxy.fromRequest(request);//这里设置默认树Cookie defaultCookie = null;String defaultAxisId = proxy.getChineseParameter("defaultAxisId");if(!StringUtil.isEmpty(defaultAxisId)){TAdminuser user = (TAdminuser)session.getAttribute(Global.SESSION_USER_NAME);if(user != null){defaultCookie = new Cookie(user.getId().toString(), defaultAxisId);defaultCookie.setPath("/");defaultCookie.setMaxAge(365*24*24*60);response.addCookie(defaultCookie);}}return "redirect:doc_tree.jspx";}

cookie的name可以是动态的值！

defaultCookie = new Cookie(user.getId().toString(), defaultAxisId);

Cookie[] cookies = request.getCookies();   //【【【【【【【【【【读取】】】】】】】】】】】】】String oldValue = "";List<Hotel> cookiesList = new ArrayList<Hotel>();if(cookies != null){for (int i = 0; i < cookies.length; i++) {if (cookies[i].getName().equalsIgnoreCase("hotel_name_id_cookie")) {  //注意用equalIgnoreCase 而不是 ==oldValue = cookies[i].getValue();try {oldValue = URLDecoder.decode(oldValue, "UTF-8");String[] arrs = oldValue.split(";");for (int j = 0; j < arrs.length; j++) {String _hotel_cd = arrs[j].substring(0,arrs[j].indexOf("*"));String _hotel_Name = arrs[j].substring(arrs[j].indexOf("*") + 1);Hotel h = new Hotel();h.setS_HotelCd(_hotel_cd);h.setS_Hotel(URLDecoder.decode(_hotel_Name, "UTF-8"));cookiesList.add(h);  }} catch (Exception e) {e.printStackTrace();}}}}request.setAttribute("cookiesList", cookiesList);

String val = "";  //【【【【【【【【【【这里是存储的另一种方式】】】】】】】】】】】】】if(oldValue!=null && !oldValue.equals("")){val = oldValue + ";" + hotelInfo.getHotel().getS_HotelCd()+"*"+hotelInfo.getHotel().getS_Hotel();val = URLEncoder.encode(val,"UTF-8");}else{val = hotelInfo.getHotel().getS_HotelCd()+"*"+hotelInfo.getHotel().getS_Hotel();val = URLEncoder.encode(val,"UTF-8");}Cookie cookie = new Cookie("hotel_name_id_cookie", val);cookie.setPath("/");cookie.setMaxAge(365 * 24 * 60 * 60);response.addCookie(cookie);   //一定要add，不然读取的时候读不到或者都是null

String val = "";if(oldValue!=null && !oldValue.equals("")){val = oldValue + ";" + hotelInfo.getHotel().getS_HotelCd()+"*"+hotelInfo.getHotel().getS_Hotel();val = URLEncoder.encode(val,"UTF-8");}else{val = hotelInfo.getHotel().getS_HotelCd()+"*"+hotelInfo.getHotel().getS_Hotel();val = URLEncoder.encode(val,"UTF-8");}Cookie cookie = new Cookie("hotel_name_id_cookie", val);cookie.setPath("/");cookie.setMaxAge(365 * 24 * 60 * 60);response.addCookie(cookie);   //一定要add，不然读取的时候读不到或者都是null

cookie的name可以是动态的值！cookie的name可以是动态的值！