年底收藏系列-Java Web工具CookieSupport

/* * CookieSupport.java * Copyright (C) 2007-3-19 <JustinLei@gmail.com> * * 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 <justinlei@gmail.com> * @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; } }

转自【http://www.blogjava.net/justinlei/archive/2009/12/18/306584.html】