简介：

        java cookie使用方法，封装工具类使用

代码示例：

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;/*** Cookie工具类*/
public class CookieUtil {/*** 设置cookie** @param maxAge 秒*/public static void setCookie(HttpServletResponse response, String cookieName, String cookieValue, int maxAge) {Cookie cookie = new Cookie(cookieName, cookieValue);maxAge = Math.max(maxAge, 0);cookie.setMaxAge(maxAge);cookie.setPath("/");response.addCookie(cookie);}public static void clearCookie(HttpServletResponse response, String cookieName, String domain) {Cookie cookie = new Cookie(cookieName, "");cookie.setMaxAge(0);cookie.setDomain(domain);cookie.setPath("/");response.addCookie(cookie);}public static void refreshCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String domain, int maxAge) {Cookie cookie = getCookie(request, cookieName);if (cookie != null) {cookie.setMaxAge(maxAge);cookie.setDomain(domain);cookie.setPath("/");response.addCookie(cookie);}}public static String getCookieValue(HttpServletRequest request, String cookieName) {Cookie cookie = getCookie(request, cookieName);if (cookie != null) {return cookie.getValue();}return null;}private static Cookie getCookie(HttpServletRequest request, String cookieName) {Cookie[] cookies = request.getCookies();if (cookies != null) {for (int i = 0; i < cookies.length; i++) {if (cookieName.equals(cookies[i].getName())) {return cookies[i];}}}return null;}
}