1.
getname 获取key   getvalue 获取值  
 Cookie[] cookie = request.getCookies();
        
        response.getWriter().write("cookie获取成功!");
        for(Cookie cookie1:cookie)
        {
            response.getWriter().write(cookie1.getName()+cookie1.getValue()+cookie1.getPath());
        }
当我们想要得到某个cookie的时候     可以将其封装成一个工具类
Cookie IwantCookie=null;
 if("key".equals(cookie1.getName())){
                IwantCookie=cookie1;
                response.getWriter().write(IwantCookie.getValue()+"</br>");
            }
if(IwantCookie!=null)
            System.out.println("找到了");
原文:https://www.cnblogs.com/whydbk/p/13372202.html