原生自动登录(filter和cookie实现)

对已经有登录状态的请求不自动登录 对路径含有登录相关的不自动登录

 public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {

        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;

        //如果服务器没有session登录状态就   尝试     自动登录
        if (request.getSession().getAttribute("userSession") == null) {

            //如果请求路径是登录注册相关 也不要自动登录了
            if(!request.getRequestURI().contains("ogin")){
                //尝试     自动登录
                Cookie[] cookies = request.getCookies();
                Cookie autoLogin = CookieUtil.getCookie(cookies, "autoLogin");
                //如果勾选了自动登录 就开始自动登录
                if (autoLogin != null) {
                    User user = new User();
                    user.setName(autoLogin.getValue().split("-")[0]);
                    user.setPassword(autoLogin.getValue().split("-")[1]);

                    LoginService loginService = new LoginService();
                    user = loginService.login(user);
                    //如果密码正确 登录成功
                    if (user != null) {
                        request.getSession().setAttribute("userSession", user);
                    }
                }
            }
        }
        chain.doFilter(req, resp);
    }