package net.fingertips.guluguluapp.util.common;

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

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

/** 
 * @ClassName: CookieUtil 
 * @Description: 管理cookie
 * @author: beckham
 * @date 2015-7-1 上午11:26:00 
 *  
 */ 
public class CookieUtil {

	/** 保存cookie的map */
	private static Map<String, Cookie> cookieMap = new HashMap<String, Cookie>();
	/**
	 * 设置cookie
	 * 
	 * @param response
	 * @param name
	 *            cookie名字
	 * @param value
	 *            cookie值
	 * @param maxAge
	 *            cookie生命周期 以秒为单位
	 */
	public static void addCookie(HttpServletResponse response, String name,
			String value, int maxAge) {
		Cookie cookie = new Cookie(name, value);
		cookie.setMaxAge(maxAge);
		response.addCookie(cookie);
	}
	
	/**
	 * 如果不设置Expires的属性那么Cookie的存活时间就是在关闭浏览器的时候
	 * @param response
	 * @param name
	 * @param value
	 */
	public static void addCookie(HttpServletResponse response, String name,String value) {
		Cookie cookie = new Cookie(name, value);
		response.addCookie(cookie);
	}

	/**
	 * 根据名字获取cookie
	 * 
	 * @param name
	 *            cookie名字
	 * @return
	 */
	public static Cookie getCookieByName(String name) {
		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
	 */
	public static void readCookieMap(HttpServletRequest request) {
		cookieMap.clear();
		Cookie[] cookies = request.getCookies();
		if (cookies != null) {
			for (Cookie cookie : cookies) {
				cookieMap.put(cookie.getName(), cookie);
			}
		}
	}

}