SpringBoot加载应用事件监听器代码实例

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,\

输出

helloworld : application , timestamp : 1591105193644
afterhelloworld : application , timestamp : 1591105193644

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