cookie 工具类

public static final int ONE_SESSION = -1;  //一次会话public static final int ONE_MONTH = 30*24*60*60;  //一个月public static final int TWO_HOURS = 2*60*60;      //2小时public static final int SIX_HOURS = 6*60*60;      //6小时public static final void clearCookie(HttpServletResponse response, String path, String cookieName) {   Cookie cookie = new Cookie(cookieName, null);   cookie.setMaxAge(0);   cookie.setPath(path);   response.addCookie(cookie);}/** * 添加页面端cookie * @param response * @param cookiename * @param cookievalue * @param path    设置路径，这个路径即该工程下都可以访问该cookie 如果不设置路径，那么只有设置该cookie路径及其子路径可以访问 * @param maxSecond */public static final void addCookie(HttpServletResponse response, String cookiename, String cookievalue, String path, int maxSecond){   Cookie cookie = new Cookie(cookiename, cookievalue);   cookie.setPath(path);   cookie.setMaxAge(maxSecond);// 24 hour   //cookie.setHttpOnly(true);   response.addCookie(cookie);}/** * 添加cookie * @param key * @param value * @param response */public static void addCookie(String key, String value, HttpServletResponse response, Integer age){   Cookie cookie = new Cookie(key, value);   cookie.setMaxAge(age);   cookie.setPath("/");   cookie.setDomain(".che.com");   response.addCookie(cookie);}/** * 添加cookie * @param key * @param value * @param response */public static void addCookie(String key, String value, HttpServletResponse response){    addCookie(key, value, response, 60 * 60 * 24 * 7);}public static final Cookie getCookie(HttpServletRequest request, String cookiename) {   Cookie cookies[] = request.getCookies();   if (cookies == null)      return null;   for (Cookie cookie : cookies) {      if (cookiename.equals(cookie.getName())) {         return cookie;      }   }   return null;}public static final String getCookieValue(HttpServletRequest request, String cookiename) {   Cookie cookie = getCookie(request, cookiename);   if (cookie == null)      return null;   return cookie.getValue();}