SecurityConfig.java

package com.example.bankapp.config;

import com.example.bankapp.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Autowired
    AccountService accountService;

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

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
                .csrf(csrf -> csrf.disable())
                .authorizeHttpRequests(authz -> authz
                        .requestMatchers("/register").permitAll()
                        .anyRequest().authenticated()
                )
                .formLogin(form -> form
                        .loginPage("/login")
                        .loginProcessingUrl("/login")
                        .defaultSuccessUrl("/dashboard", true)
                        .permitAll()
                )
                .logout(logout -> logout
                        .invalidateHttpSession(true)
                        .clearAuthentication(true)
                        .logoutUrl("/logout")
                        .logoutSuccessUrl("/login?logout")
                        .permitAll()
                )
                .headers(headers -> headers
                        .frameOptions(frameOptions -> frameOptions.sameOrigin())
                );

        return http.build();
    }

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(accountService).passwordEncoder(passwordEncoder());

    }
}