SecurityConfig.java

package com.example.LoginPlusSecurity.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
public class SecurityConfig {

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .csrf(csrf -> csrf.disable()) 
            .authorizeHttpRequests(auth -> auth
                .requestMatchers("/register", "/login", "/css/**").permitAll()
                .requestMatchers("/admin/**").hasRole("ADMIN")
                //.requestMatchers("/user/**").hasRole("USER")
                .anyRequest().permitAll()
            )
            .formLogin(form -> form
                .loginPage("/login")
                .defaultSuccessUrl("/", true)
                .permitAll()
            )
            .logout(logout -> logout
                .logoutUrl("/logout")
                .logoutSuccessUrl("/login?logout")
                .deleteCookies("JSESSIONID")
                .permitAll()
            );
        return http.build();
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
}