SpringBoot加载应用事件监听器代码实例

Z时代
2024-01-10
分类：综合

利用 Spring 工厂加载机制，实例化 ApplicationListener 实现类，并排序对象集合

创建应用事件监听器

创建类实现接口ApplicationListener,可以使用@Order或实现Orderd接口进行排序


@Order(Ordered.HIGHEST_PRECEDENCE)
public class HelloWorldApplicationListener implements ApplicationListener<ContextRefreshedEvent> {
  @Override
  public void onApplicationEvent(ContextRefreshedEvent event) {
    System.out.println("HelloWorld : " + event.getApplicationContext().getId()
        + " , timestamp : " + event.getTimestamp());
  }
}


public class AfterHelloWorldApplicationListener implements ApplicationListener<ContextRefreshedEvent>,Ordered {
  @Override
  public void onApplicationEvent(ContextRefreshedEvent event) {
    System.out.println("AfterHelloWorld : " + event.getApplicationContext().getId()
        + " , timestamp : " + event.getTimestamp());
  }
  @Override
  public int getOrder() {
    return Ordered.LOWEST_PRECEDENCE;
  }
}

在spring.properties中配置

# ApplicationListener
org.springframework.context.ApplicationListener=\
com.imooc.diveinspringboot.listener.AfterHelloWorldApplicationListener,\
com.imooc.diveinspringboot.listener.HelloWorldApplicationListener,\

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