El entorno de Spring usa el modo de observador ApplicationListener
manifestación
Clase de objeto de evento específico
public class MyEvent extends ApplicationEvent {
public MyEvent(Object source) {
super(source);
}
public <T> T getEventSource(Class<T> tClass){
return JSON.parseObject(String.valueOf(getSource()),tClass);
}
}
Observador de eventos abstractos
public abstract class AbMyApplicationListener implements ApplicationListener<MyEvent> {
@Override
public void onApplicationEvent(MyEvent event) {
System.out.println("收到的监听事件抽象类：");
//子类去实现具体逻辑
execute(event);
}
abstract void execute(MyEvent event);
}
Subclase de lógica de implementación específica
@Component
public class MyApplicationListener extends AbMyApplicationListener {
@Override
void execute(MyEvent event) {
System.out.println("我收到了通知，我是具体执行业务逻辑的子类："+ event.getEventSource(Map.class));
}
}
Obtener ApplicationContext
@Component
public class ApplicationContextUtil implements ApplicationContextAware {
private static ApplicationContext applicationContext;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
}
Observado, editor de eventos
@RunWith(SpringRunner.class)
@SpringBootTest(classes = DemoApplication.class)
public class AppTest {
@Test
public void test() {
Map<String,String> map = new HashMap<>();
map.put("name","zhangsan");
map.put("age","22");
MyEvent myEvent = new MyEvent(JSON.toJSONString(map));
ApplicationContext applicationContext = ApplicationContextUtil.getApplicationContext();
applicationContext.publishEvent(myEvent);
}
}