本系统登陆功能用户在界面选择好自己的角色然后输入正确的账号和密码进行系统的访问为了安全性考虑系统编写了拦截器拦截了除登陆页面的一切请求在拦截器中判断用户信息是否存在服务端用户登陆成功后系统将用户信息存在session作用域中如果没有用户信息的存在说明用户没有进行登陆拦截器将不允许任何请求的通过重新将用户待会登陆页面。优化这段话再优化一下

The login function of this system allows users to select their role on the interface and enter the correct account and password to access the system. To ensure security, the system has implemented interceptors to block all requests except for the login page. The interceptors check whether user information exists on the server (after the user has successfully logged in, their information is stored in the session scope). If there is no user information, it means the user has not logged in, and the interceptors will not allow any requests to pass through. The user will be redirected to the login page. This process has been optimized for security and user experience