public class EventBus {

    private static Map<String, EventListener> eventListeners = new HashMap<>();

    public static void addEventListener(EventListener listener) {

        String listenerName = getListenerName(listener);

        eventListeners.put(listenerName, listener);

    }

    public static void removeEventListener(EventListener listener) {

        String listenerName = getListenerName(listener);

        eventListeners.remove(listenerName);

    }

    public static void sendEvent(Event event) {

        Collection<EventListener> listeners = eventListeners.values();

        for (EventListener listener : listeners) {

            if (listener != null) {

                listener.onEvent(event);

            }

        }

    }

    private static String getListenerName(TMSEventListener listener) {

        String listenerName = listener.getName();

        if (StringUtils.isBlank(listenerName)) {

            listenerName = listener.getClass().getName();

        }

        return listenerName;

    }

}

public interface EventListener {

    /**

     * 监听到事件后会调用此函数

     * @param event

     */

    public void onEvent(Event event);

    /**

     * 事件监听器的唯一名字

     * @return 字符串

     */

    public String getName();

}

public class Event {

    private String name;

    private Object data;

    public Event() {

    }

    public Event(String name,Object data) {

        this.data = data;

        this.name = name;

    }

    public Object getData() {

        return data;

    }

    public void setData(Object data) {

        this.data = data;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

}