java cookie使用方法

古城微笑少年丶 2023-09-26 19:50 86阅读 0赞

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;
        }
    }