从浏览器请求中提取cookies并对cookis进行操作

1、根据名字获取cookie：public static Cookie getCookieByName(HttpServletRequest request, String name) { Map<String, Cookie> cookieMap = ReadCookieMap(request); if (cookieMap.containsKey(name)) { Cookie cookie = (Cookie) cookieMap.get(name); return cookie; } else { return null; } }

2、将cookie封装到Map里面：private static Map<String, Cookie> ReadCookieMap(HttpServletRequest request) { Map<String, Cookie> cookieMap = new HashMap<String, Cookie>(); Cookie[] cookies = request.getCookies(); if (null != cookies) { for (Cookie cookie : cookies) { cookieMap.put(cookie.getName(), cookie); } } return cookieMap; }

3、保存Cookies：public static HttpServletResponse setCookie(HttpServletResponse response, String name, String value,int time) { // new一个Cookie对象,键值对为参数 Cookie cookie = new Cookie(name, value); // tomcat下多应用共享 cookie.setPath("/"); // 如果cookie的值中含有中文时，需要对cookie进行编码，不然会产生乱码 try { URLEncoder.encode(value, "utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } cookie.setMaxAge(time); // 将Cookie添加到Response中,使之生效 response.addCookie(cookie); // addCookie后，如果已经存在相同名字的cookie，则最新的覆盖旧的cookie return response; }