Java Web工具CookieSupport

 /*
  * CookieSupport.java
  * Copyright (C) 2007-3-19  <[email protected]>
  *
  *        This program is free software; you can redistribute it and/or modify
  *        it under the terms of the GNU General Public License as published by
  *      the Free Software Foundation; either version 2 of the License, or
  *     (at your option) any later version.
  *
  *       This program is distributed in the hope that it will be useful,
  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *        GNU General Public License for more details.
  *
  */
 package org.lambdasoft.web.support;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Set;
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.lambdasoft.utils.StringUtils;
 /**
  * @author TangLei <[email protected]>
  * @date 2008-12-17
  */
 public class CookieSupport {
     private CookieSupport() {
     }
     /**
      * 写cookies
      *
      * @param response
      * @param cookieParams
      * @param maxAge
      */
     public static final void writeCookies(HttpServletResponse response,
             Map<String, String> cookieParams, int maxAge) {
         if (cookieParams == null || cookieParams.size() == 0)
             return;
         Set<String> keySet = cookieParams.keySet();
         for (String key : keySet) {
             Cookie cookie = new Cookie(key, cookieParams.get(key));
             cookie.setMaxAge(maxAge);
             response.addCookie(cookie);
         }
     }

     /**
      * 删除所有的cookies
      * @param request
      * @param response
      */
     public static final void removeAllCookies(HttpServletRequest request,HttpServletResponse response) {
         Cookie[] cookies = request.getCookies();
         if(cookies == null || cookies.length == 0)
             return;
         Map<String, String> cookiesMap = new HashMap<String, String>();
         for (Cookie cookie : cookies) {
             cookiesMap.put(cookie.getName(),"");
         }
         writeCookies(response, cookiesMap, 0);
     }

     /**
      * 读取cookies
      *
      * @param request
      * @param cookieName
      * @return
      */
     public static final Cookie[] readCookies(HttpServletRequest request,String cookieName) {
         Cookie[] cookies = request.getCookies();
         if(cookies == null || cookies.length == 0)
             return null;
         if(StringUtils.isEmpty(cookieName))
             return cookies;
         for (int i = 0; i < cookies.length; i++) {
             if(cookies[i].getName().equals(cookieName))
                 return new Cookie[] {cookies[i]};
         }
         return null;
     }
 }