springBoot的事件机制GenericApplicationListener用法解析

// 第一种方式
public class AiInfluxdbApplicationListener implements GenericApplicationListener {
  @Override
  public int getOrder() {
    return Ordered.LOWEST_PRECEDENCE;
  }
  @Override
  public boolean supportsEventType(ResolvableType eventType) {
    return ApplicationReadyEvent.class.isAssignableFrom(eventType.getRawClass());
  }
  @Override
  public void onApplicationEvent(ApplicationEvent event) {
    System.out.print("here is ApplicationReadyEvent");
  }
}
//第二种方式
public class ConfigApplicationListener implements ApplicationListener<ApplicationEnvironmentPreparedEvent>, Ordered {
  @Override
  public int getOrder() {
    return HIGHEST_PRECEDENCE;
  }
  @Override
  public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {

  }
}
//META-INF/spring.factories文件定义
org.springframework.context.ApplicationListener=\
com.demotest.core.ApplicationStartListener