springboot启动后执行方法的五种实现形式

亲自测试,
按照执行顺序如下:
第一种:
@Component
public class SpringContext1 {
    @PostConstruct
    public  void pingStart(){
        System.out.println(" ======================1  @PostConstruc方法开始执行==================");
    }
}

第二种:
@Component
public class SpringContextUtils implements ApplicationContextAware {
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        System.out.println(" ======================2  implements ApplicationContextAware方法开始执行啦==================");
    }
}

第三种(会执行多次):
@Component
public class SpringContext2 implements ApplicationListener {
    @Override
    public void onApplicationEvent(ApplicationEvent event) {
        System.out.println(" ======================3  implements ApplicationListener方法开始执行==================");
    }
}

第四种:
@Component
public class SpringContext4 implements ApplicationRunner {
    @Override
    public void run(ApplicationArguments args) throws Exception {
        System.out.println(" ======================4  implements ApplicationRunner==================");
    }
}

第五种:
@Component
public class SpringContext3 implements CommandLineRunner {
    @Override
    public void run(String... args) throws Exception {
        System.out.println(" ======================5  implements CommandLineRunner==================");
    }
}