@Component
public class StartupRunner implements CommandLineRunner {

    @Override
    public void run(String... args) throws Exception {
        // 在應(yīng)用啟動(dòng)時(shí)執(zhí)行的初始化邏輯
        System.out.println("應(yīng)用啟動(dòng)時(shí)執(zhí)行初始化操作...");
        // 可以在這里進(jìn)行一些數(shù)據(jù)加載、配置初始化等操作
    }
}

@Component
public class ApplicationStartupRunner implements ApplicationRunner {

    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println("應(yīng)用啟動(dòng)時(shí)執(zhí)行初始化操作...");
    }
}

@Component
public class MyStartupService {

    @PostConstruct
    public void init() {
        // 這是 Spring 完成所有 bean 初始化后執(zhí)行的代碼
        System.out.println("Spring 容器初始化完成，執(zhí)行初始化操作...");
    }
}

@Component
public class StartupEventListener {

    @EventListener(ApplicationReadyEvent.class)
    public void onApplicationReady() {
        // 應(yīng)用完全啟動(dòng)后執(zhí)行的操作
        System.out.println("Spring Boot 應(yīng)用啟動(dòng)完成，可以執(zhí)行初始化操作...");
    }
}

@Component
public class ContextRefreshListener {

    @EventListener(ContextRefreshedEvent.class)
    public void onContextRefreshed() {
        // Spring 容器刷新時(shí)執(zhí)行的操作
        System.out.println("Spring 容器刷新完畢，執(zhí)行初始化操作...");
    }
}

@Component
public class InitializationBeanTest implements InitializingBean{
    private static final Logger LOG = LoggerFactory.getLogger(InitializationBeanTest.class);
 
    @Override
    public void afterPropertiesSet() throws Exception {
        LOG.info("InitializingBean 開(kāi)始了。。。");
        //初始化操作
    }
}

@Component
@Profile("dev")  // 僅在 dev 配置下執(zhí)行
public class DevStartupRunner implements CommandLineRunner {

    @Override
    public void run(String... args) throws Exception {
        System.out.println("開(kāi)發(fā)環(huán)境下執(zhí)行初始化操作...");
    }
}

@SpringBootApplication
public class MyApplication {

    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(MyApplication.class);
        app.setBanner((environment, sourceClass, out) -> out.println("My Custom Banner!"));
        app.run(args);
    }
}

@Configuration
public class DataInitConfig {

    @Bean
    public CommandLineRunner initializeData() {
        return args -> {
            // 在應(yīng)用啟動(dòng)時(shí)加載或初始化數(shù)據(jù)
            System.out.println("初始化數(shù)據(jù)...");
            // 可以在這里調(diào)用數(shù)據(jù)庫(kù)服務(wù)或其他業(yè)務(wù)邏輯
        };
    }
}