/**
 *  cookie工具类
 * @author Stodger
 * @version V1.0
 */

public class CookieUtil {

    /**
     * 获取cookie值
     * @param request
     * @param cookieName 名称
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName){
        Cookie[] cookies = request.getCookies();
        if(cookies != null){
            for(Cookie cookie : cookies){
                if(cookie.getName().equals(cookieName)){
                    return cookie.getValue();
                }
            }
        }
        return null;
    }

    /**
     * 设置cookie
     * @param response
     * @param cookieName 名称
     * @param value 值
     * @param cookieMaxAge 存活时间
     */
    public static void setCookie(HttpServletResponse response, String cookieName, String value,int cookieMaxAge){
        Cookie cookie = new Cookie(cookieName,value);
        cookie.setPath("/");
        cookie.setMaxAge(cookieMaxAge);
        response.addCookie(cookie);
    }

    /**
     * 移除cookie
     * @param request
     * @param response
     * @param name 名称
     */
    public static void removeCookie(HttpServletRequest request, HttpServletResponse response, String name) {
        if (null == name) {
            return;
        }
        setCookie(response,name,null,0);
    }
}