Spring中事件监听器

实现ApplicationListener接口

@Configuration
public class A48 {public static void main(String[] args) {AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(A48.class);context.getBean(MyService.class).doBusiness();context.close();}// 定义任务static class MyEvent extends ApplicationEvent{public MyEvent(Object source) {super(source);}}@Component@Slf4jstatic class MyService{@Resourceprivate ApplicationEventPublisher publisher;public void doBusiness(){log.info("主线业务");publisher.publishEvent(new MyEvent("myservice发送的事件"));}}@Component@Slf4jstatic class SmsApplicationListener implements ApplicationListener<MyEvent>{@Overridepublic void onApplicationEvent(MyEvent event) {log.info("支线任务");}}
}

@EventListener注解

@Component
@Slf4j
static class SmsApplicationListener{@EventListenerpublic void listener(MyEvent event){log.info("发送短信....");}
}

@EventListener结合线程池异步

@Component
@Slf4j
static class SmsApplicationListener{@EventListenerpublic void listener(MyEvent event){log.info("发送短信....");}
}// 线程池异步发送事件
@Bean
public ThreadPoolTaskExecutor executor(){ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();executor.setCorePoolSize(3);executor.setMaxPoolSize(10);executor.setQueueCapacity(100);return executor;
}@Bean
public SimpleApplicationEventMulticaster applicationEventMulticaster(ThreadPoolTaskExecutor executor){SimpleApplicationEventMulticaster multicaster = new SimpleApplicationEventMulticaster();multicaster.setTaskExecutor(executor);return multicaster;
}

自定义listener进行解析

public static void main(String[] args) {AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(A48.class);SmsService bean = context.getBean(SmsService.class);for (Method method : SmsService.class.getMethods()) {if(method.isAnnotationPresent(MyListener.class)){ApplicationListener listener = new ApplicationListener() {@Overridepublic void onApplicationEvent(ApplicationEvent event) {try {method.invoke(bean,event);} catch (Exception e) {e.printStackTrace();}}};context.addApplicationListener(listener);}}context.close();
}@Component
@Slf4j
static class SmsService{@MyListenerpublic void listener(ApplicationEvent event){log.info("发送短信....");}
}