/**
 * @Description: 
 *
 * @Title: CookieUtil.java
 * @Package com.hupu.nac.util
 * @Copyright: Copyright (c) 2014
 *
 * @author Comsys-LZP
 * @date 2014-1-15 上午10:17:51
 * @version V2.0
 */
package com.hupu.nac.util;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @Description: Cookie读写
 *
 * @ClassName: CookieUtil
 * @Copyright: Copyright (c) 2014
 *
 * @author Comsys-LZP
 * @date 2014-1-15 上午10:17:51
 * @version V2.0
 */
public class CookieUtil {
	
	/**
	 * @Description: 添加cookie 
	 *
	 * @param response
	 * @param name
	 * @param value
	 * @param maxAge
	 * @return
	 *
	 * @Title: CookieUtil.java
	 * @Copyright: Copyright (c) 2014
	 *
	 * @author Comsys-LZP
	 * @date 2014-1-15 上午10:29:29
	 * @version V2.0
	 */
	public static Cookie addCookie(HttpServletResponse response,String name,String value,int maxAge){
	    Cookie cookie = new Cookie(name,value);
		cookie.setPath("/");
	    if(maxAge > 0){
	    	cookie.setMaxAge(maxAge);
	    }
	    response.addCookie(cookie);
	    return cookie;
	}
	
	/**
	 * @Description: 根据key获取Cookie对象
	 *
	 * @param request
	 * @param key
	 * @return
	 *
	 * @Title: CookieUtil.java
	 * @Copyright: Copyright (c) 2014
	 *
	 * @author Comsys-LZP
	 * @date 2014-1-15 上午10:29:44
	 * @version V2.0
	 */
	public static Cookie getCookieByName(HttpServletRequest request,String key){
	    Map<String,Cookie> cookieMap = readCookieMap(request);
	    if(cookieMap.containsKey(key)){
	        Cookie cookie = (Cookie)cookieMap.get(key);
	        return cookie;
	    }else{
	        return null;
	    }   
	}
	
	/**
	 * @Description: 封装Cookie读取方法
	 *
	 * @param request
	 * @return
	 *
	 * @Title: CookieUtil.java
	 * @Copyright: Copyright (c) 2014
	 *
	 * @author Comsys-LZP
	 * @date 2014-1-15 上午10:30:05
	 * @version V2.0
	 */
	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;
	}
}

Java对Cookie的添加和查询