spring4.2的应用事件

监听器/类

@EventListener注解在类的方法上，并将该类作为spring的组件（该类用@Component注解）

@Component
public class MyEventHandle {
@EventListener(condition = "#myEvent.flag")
public void hangle(MyEvent myEvent){

System.out.println(myEvent.getUsername());

}
}

事件源类

public class MyEvent {
private String username;
private boolean flag;
}

事件类---发布事件/监听到事件状态（变化）

ApplicationEventPublisher的publishEvent（）方法

@RequestMapping("/event")
@ResponseBody
public String eventHandle(){

MyEvent myEvent=new MyEvent();
MyEvent myEvent1=new MyEvent("fcc",false);
this.publisher.publishEvent(myEvent1);
myEvent1.setUsername("bb");
return "fcc";
}

@Autowired
private  ApplicationEventPublisher publisher;

执行这行代码时

this.publisher.publishEvent(myEvent1);

调用此事件

@EventListener(condition = "#myEvent.flag")
public void hangle(MyEvent myEvent){

System.out.println(myEvent.getUsername());

}