Java实现对cookie的增删改查

原文地址：http://blog.csdn.net/k21325/article/details/54377830   
    @RequestMapping(value="meeting/addGuanzhu.do",method=RequestMethod.POST)
    @ResponseBody
    public Map<String, Object> addGuanzhu(HttpServletRequest request,HttpServletResponse response, Model model, String submitter) throws UnsupportedEncodingException {
        Map<String, Object> reMap = new HashMap<String, Object>();
         //获取登录用户id
         String adminId = tsAdminService.getAdminIdCookie(request);
         System.out.println(submitter);
         if(submitter!=null && !"".equals(submitter)){
             if(submitter!=null&&!"".equals(submitter)){
                 Cookie cookie = new Cookie(adminId.trim(), URLEncoder.encode(submitter.trim(), "UTF-8"));  
                 cookie.setMaxAge(60 * 60 * 24 * 360);// 设置为30min  
                 cookie.setPath("/");
                 response.addCookie(cookie); 
                 reMap.put("success", "success");
             }else{
                 reMap.put("success", "false");
             } 
         }else{
             CookieUtils.delCookieByName(request, response, adminId);
             reMap.put("success", "false");
         }
         return reMap;
    }



CookieUtils工具类
// 根据名称获取cookie
    public static Cookie getCookieByName(HttpServletRequest request, String name) {
        Map<String, Cookie> cookieMap = ReadCookieMap(request);
        if (cookieMap.containsKey(name)) {
            Cookie cookie = (Cookie) cookieMap.get(name);
            return cookie;
        } else {
            return null;
        }
    }

    // 先把cookie封装到Map中
    private static Map<String, Cookie> ReadCookieMap(HttpServletRequest request) {
        Map<String, Cookie> cookieMap = new HashMap<String, Cookie>();
        Cookie[] cookies = request.getCookies();
        if (null != cookies) {
            for (Cookie cookie : cookies) {
                cookieMap.put(cookie.getName(), cookie);
            }
        }
        return cookieMap;
    }

    // 根据名称删除cookie
    public static void delCookieByName(HttpServletRequest request, HttpServletResponse response, String name) {
        Cookie[] cookies = request.getCookies();
        if (null == cookies) {
            System.out.println("没有cookie==============");
        } else {
            for (Cookie cookie : cookies) {
                if (cookie.getName().equals(name)) {
                    cookie.setValue(null);
                    cookie.setMaxAge(0);// 立即销毁cookie
                    cookie.setPath("/");
                    System.out.println("被删除的cookie名字为:" + cookie.getName());
                    response.addCookie(cookie);
                    break;
                }
            }
        }
    }
    //根据名称修改cookie的值
    public void editCookie(HttpServletRequest request, HttpServletResponse response, String name, String value) {
        Cookie[] cookies = request.getCookies();
        if (null == cookies) {
            System.out.println("没有cookie==============");
        } else {
            for (Cookie cookie : cookies) {
                if (cookie.getName().equals(name)) {
                    System.out.println("原值为:" + cookie.getValue());
                    cookie.setValue(value);
                    cookie.setPath("/");
                    cookie.setMaxAge(30 * 60);// 设置为30min
                    System.out.println("被修改的cookie名字为:" + cookie.getName() + ",新值为:" + cookie.getValue());
                    response.addCookie(cookie);
                    break;
                }
            }
        }

    }