アノテーションインターフェース EnableWebSecurity

このアノテーションを @Configuration クラスに追加して、Spring Security 構成を任意の WebSecurityConfigurer で定義するか、SecurityFilterChain Bean を公開する可能性が高くなります。

 @Configuration
 @EnableWebSecurity
 public class MyWebSecurityConfiguration {

        @Bean
        public WebSecurityCustomizer webSecurityCustomizer() {
                return (web) -> web.ignoring()
                // Spring Security should completely ignore URLs starting with /resources/
                                .requestMatchers("/resources/**");
        }

        @Bean
        public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
                http.authorizeHttpRequests((authorize) -> authorize
                        .requestMatchers("/public/**").permitAll()
                        .anyRequest().hasRole("USER"))
                                // Possibly more configuration ...
                                .formLogin() // enable form based log in
                                // set permitAll for all URLs associated with Form Login
                                .permitAll();
                return http.build();
        }

        @Bean
        public UserDetailsService userDetailsService() {
                UserDetails user = User.withDefaultPasswordEncoder()
                        .username("user")
                        .password("password")
                        .roles("USER")
                        .build();
                UserDetails admin = User.withDefaultPasswordEncoder()
                        .username("admin")
                        .password("password")
                        .roles("ADMIN", "USER")
                        .build();
                return new InMemoryUserDetailsManager(user, admin);
        }

        // Possibly more bean methods ...
 }