my-bigScreen/src/main/java/com/mini/mybigscreen/Config/LoginInterceptor.java

package com.mini.mybigscreen.Config;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;


@Component
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession(false);
        if (session == null) {
            response.sendRedirect("/login");
            return false;
        }
        return true;
    }
}