Java程序初始化启动自动执行的三种方式

@SpringBootApplication
public class MyApplication {
    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class,args);
    }
}

@Service
@Slf4j
public class PostConstructTest {
 
    @PostConstruct
    public void testPostConstruct () {
      log.info("程序初始化执行");
    }
 
}

@Slf4j
@Component
public class InitCommandLineRunner implements CommandLineRunner {
    @Override
    public void run(String... args) throws Exception {
        log.info("实现CommandLineRunner接口的程序初始化");
    }
}

@Component
@Slf4j
public class InitApplicationRunner implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) throws Exception {
        log.info("实现ApplicationRunner接口程序初始化");
    }
}

@Slf4j
@Component
@Order(value = 1)
public class InitCommandLineRunner implements CommandLineRunner {
    @Override
    public void run(String... args) throws Exception {
        log.info("实现CommandLineRunner接口的程序初始化");
        Thread.sleep(2000);
    }
}

@Component
@Slf4j
@Order(value = 2)
public class InitApplicationRunner implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) throws Exception {
        log.info("实现ApplicationRunner接口程序初始化");
    }
}