Cookie 用法 小记

//保存cookie 

Cookie cookieName = new Cookie("name", realUser.getName());

                Cookie cookiePwd = new Cookie("pwd", realUser.getPwd());

                Cookie cookieId = new Cookie("id", realUser.getId()+"");

                int time = 60*60*24*7;

                cookieId.setMaxAge(time);

                cookieName.setMaxAge(time);

                cookieId.setMaxAge(time);

                response.addCookie(cookieName);

                response.addCookie(cookiePwd);

                response.addCookie(cookieId);  

 

 

 

//jsp 中读取cookie

 

 

<%

    Cookie cookie[] = request.getCookies();

    if (cookie != null) {

        

        for (int i = 0; i < cookie.length; i++) {

            System.out.println(cookie[i].getValue());

            Cookie c = cookie[i];

            if (c.getValue().equals("admin")) {//查找cookie里面的是否存在cookie键位c_name的cookie

                //如果存在该键 取该键对应的值==>相当于Map取值

                response.sendRedirect("hello.jsp");

            }

        }

    }

%>