SSH中的重构 cookies的管理

SSH中的重构 cookies的管理

目的：集中管理cookies

做法：建造一个类单独管理cookies

下面是一个简单的例子保存用户名（两个星期的时效）

public class CookieInfo {
    public static final String USERNAME = "USERNAME";
    public static final int TWOWEEK = 60 * 60 * 24 * 30;

    public static String getUserName(HttpServletRequest request) {
        return getCookie(request, USERNAME);
    }

    public static void addUserName(HttpServletResponse response, String value) {
        addCookie(response, USERNAME, value);
    }

    public static void delUserName(HttpServletRequest request, HttpServletResponse response) {
        delCookie(request,response,USERNAME);
    }

    private static void addCookie(HttpServletResponse response, String key, String value) {
        Cookie cookie = new Cookie(key, java.net.URLEncoder.encode(value));
        cookie.setMaxAge(TWOWEEK);
        response.addCookie(cookie);
    }

    private static String getCookie(HttpServletRequest request, String key) {
        if (request.getCookies() == null)
            return "";

        for (Cookie cookie : request.getCookies()) {
            if (key.equals(cookie.getName())) {
                return java.net.URLDecoder.decode(cookie.getValue());
            }
        }

        return "";
    }

    private static void delCookie(HttpServletRequest request,HttpServletResponse response,String key) {
        if (request.getCookies() == null) return;

        for (Cookie cookie : request.getCookies()) {
            if (key.equals(cookie.getName())) {
                cookie.setMaxAge(0);
                response.addCookie(cookie);
            }
        }
    }
}