java读取和写入浏览器Cookies

/*
 * 该类可以从浏览器请求中提取出COOKIEs并进行对cookis的相关操作
 * 
 */

public class COOKIEsUtil extends BaseController {
    
    /**
     * 根据名字获取COOKIE
     * 
     * @param request
     * @param name
     *            COOKIE名字
     * @return
     */
    public static COOKIE getCOOKIEByName(HttpServletRequest request, String name) {
        Map COOKIEMap = ReadCOOKIEMap(request);
        if (COOKIEMap.containsKey(name)) {
            COOKIE COOKIE = (COOKIE) COOKIEMap.get(name);
            return COOKIE;
        } else {
            return null;
        }
    }

    /**
     * 将COOKIE封装到Map里面
     * 
     * @param request
     * @return
     */
    private static Map ReadCOOKIEMap(HttpServletRequest request) {
        Map COOKIEMap = new HashMap();
        COOKIE[] COOKIEs = request.getCOOKIEs();
        if (null != COOKIEs) {
            for (COOKIE COOKIE : COOKIEs) {
                COOKIEMap.put(COOKIE.getName(), COOKIE);
            }
        }
        return COOKIEMap;
    }

    /**
     * 保存COOKIEs
     * 
     * @param response
     *            servlet请求
     * @param value
     *            保存值
     * @author jxf
     */
    public static HttpServletResponse setCOOKIE(HttpServletResponse response, String name, String value,int time) {
        // new一个COOKIE对象,键值对为参数
        COOKIE COOKIE = new COOKIE(name, value);
        // tomcat下多应用共享
        COOKIE.setPath("/");
        // 如果COOKIE的值中含有中文时，需要对COOKIE进行编码，不然会产生乱码
        try {
            URLEncoder.encode(value, "utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        COOKIE.setMaxAge(time);
        // 将COOKIE添加到Response中,使之生效
        response.addCOOKIE(COOKIE); // addCOOKIE后，如果已经存在相同名字的COOKIE，则最新的覆盖旧的COOKIE
        return response;
    }

 1 /**
 2      * 
删除无效COOKIE
 3      * 
无效☞1.过时 2.未发布
 4      * @param request
 5      * @param response
 6      * @param list
 7      */
 8     private void delectCOOKIEByName(HttpServletRequest request, HttpServletResponse response,String deleteKey) throws NullPointerException {
12         Map COOKIEMap = ReadCOOKIEMap(request);
17          for (String key : COOKIEMap.keySet()) {   
18              if(key==deleteKey && key.equals(deleteKey)) {
19                  COOKIE COOKIE = COOKIEMap.get(key);
21                  COOKIE.setMaxAge(0);//设置COOKIE有效时间为0
22                  COOKIE.setPath("/");//不设置存储路径
23                  response.addCOOKIE(COOKIE);
24              }
25             } 
26     }