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）

@Componentpublic 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());    }