SecurityConfig.java

package hello.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
@EnableWebSecurity
public class SecurityConfig {

    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
                .antMatchers(HttpMethod.GET, "/", "/greeting").permitAll()
                .anyRequest().authenticated()
                .and()
            .httpBasic()
                .and()
            .csrf().disable(); // Disable CSRF for REST API; consider enabling if serving browser forms
        return http.build();
    }
}