public  class  HelloApplicationContextInitializer  implements ApplicationContextInitializer<ConfigurableApplicationContext>  {

    @Override

    public  void  initialize(ConfigurableApplicationContext  applicationContext)  {

　　 System.out.println("ApplicationContextInitializer...initialize..."+applicationContext);     
}

}

public  class  HelloSpringApplicationRunListener  implements  SpringApplicationRunListener  {

//必须有的构造器

public  HelloSpringApplicationRunListener(SpringApplication  application,  String[]  args){

}

@Override

public void starting() { 
System.out.println("SpringApplicationRunListener...starting...");

}

@Override

public  void  environmentPrepared(ConfigurableEnvironment  environment)  { 
Object  o  =  environment.getSystemProperties().get("os.name");

System.out.println("SpringApplicationRunListener...environmentPrepared.."+o);

}

@Override

public  void  contextPrepared(ConfigurableApplicationContext  context)  { 
System.out.println("SpringApplicationRunListener...contextPrepared...");

}

@Override

public  void  contextLoaded(ConfigurableApplicationContext  context)  { 
System.out.println("SpringApplicationRunListener...contextLoaded...");

}

@Override

public  void  finished(ConfigurableApplicationContext  context,  Throwable  exception)  

org.springframework.context.ApplicationContextInitializer=\

com.atguigu.springboot.listener.HelloApplicationContextInitializer

　org.springframework.boot.SpringApplicationRunListener=\

　com.atguigu.springboot.listener.HelloSpringApplicationRunListener

@Component

public  class  HelloApplicationRunner  implements  ApplicationRunner{

@Override

public  void  run(ApplicationArguments  args)  throws  Exception  {

System.out.println("ApplicationRunner...run....");

}

}

@Component

public  class  HelloCommandLineRunner  implements  CommandLineRunner  {

@Override

public void run(String... args) throws Exception {

System.out.println("CommandLineRunner...run..."+  Arrays.asList(args));

}

}