Cookie自定义工具API
package com.jt.util; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class CookieUtil { /** * 该工具API主要的任务 * 1.根据cookie的名称 返回cookie对象 * 2.根据cookie的名称 返回valve的值 * 3.新增cookie方法 * 4.删除cookie方法 */ public static Cookie getCookie(String cookieName, HttpServletRequest request){ Cookie[] cookies = request.getCookies(); //获取请求中的cookie if(cookies !=null && cookies.length >0) { //判断数组的标准写法 for (Cookie cookie : cookies) { if (cookieName.equals(cookie.getName())) { return cookie; } } } return null ; } public static String getCookieValue(String cookieName,HttpServletRequest request){ Cookie cookie = getCookie(cookieName, request); return cookie ==null?null:cookie.getValue(); // ? : 三目元算 } public static void addCookie(String cookieName, String cookieValue, String path, String domain, int maxAge, HttpServletResponse response){ Cookie cookie = new Cookie(cookieName,cookieValue); cookie.setPath(path); cookie.setDomain(domain); cookie.setMaxAge(maxAge); response.addCookie(cookie); } public static void deleteCookie(String cookieName,String path, String domain,HttpServletResponse response){ addCookie(cookieName,"",path, domain, 0, response); } }