Java内容重新整理删除过期的东西

Java/JavaDemo/codedemo/eventdriver_improve/ClientMain.java

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+package cn.aofeng.demo.eventdriver_improve;
+/**
+ * 事件驱动调用示例
+ * @author 聂勇 <a href="mailto:aofengblog@163.com">aofengblog@163.com</a>
+ */
+public class ClientMain {
+
+    public static void main(String[] args) {
+        EventManagement eventManagement = new EventManagement();
+        eventManagement.addListener("read", new HelloWorldListener());
+        eventManagement.addListener("write", new SimpleListener());
+        
+        EventSource eventSource = new EventSource(eventManagement);
+        eventSource.fire(new Event("read", "this is a read event"));
+        eventSource.fire(new Event("write", "this is a write event"));
+    }
+
+    public static class HelloWorldListener implements EventListener {
+
+        @Override
+        public void execute(Event event) {
+            System.out.println("监听器:"+this +  "接收到事件，事件类型是:" 
+                    + event.getEventType() + ", 事件附带的数据:" + event.getData());
+        }
+        
+    }
+    
+    public static class SimpleListener implements EventListener {
+
+        @Override
+        public void execute(Event event) {
+            System.out.println("监听器:"+this +  "接收到事件，事件类型是:" 
+                    + event.getEventType() + ", 事件附带的数据:" + event.getData());
+        }
+        
+    }
+
+}

Java/JavaDemo/codedemo/eventdriver_improve/Event.java

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+package cn.aofeng.demo.eventdriver_improve;
+/**
+ * 事件
+ * 
+ * @author aofeng <aofengblog@163.com>
+ */
+public class Event {
+
+    // 事件附带的数据
+    private Object data;
+    
+    // 事件类型
+    private String eventType;
+    
+    public Event(String eventType, Object obj){
+        this.eventType = eventType;
+        this.data = obj;
+    }
+
+    public Object getData() {
+        return this.data;
+    }
+    
+    public String getEventType() {
+        return this.eventType;
+    }
+
+}

Java/JavaDemo/codedemo/eventdriver_improve/EventListener.java

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+package cn.aofeng.demo.eventdriver_improve;
+/**
+ * 事件监听器(监听一个或多个事件并进行具体的处理)
+ * 
+ * @author aofeng <aofengblog@163.com>
+ */
+public interface EventListener {
+
+	/**
+	 * 处理事件
+	 * 
+	 * @param event    事件
+	 */
+	public void execute(Event event);
+
+}

Java/JavaDemo/codedemo/eventdriver_improve/EventManagement.java

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+package cn.aofeng.demo.eventdriver_improve;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 事件管理器。负责
+ * 
+ * @author aofeng <aofengblog@163.com>
+ */
+public class EventManagement {
+
+    private Map<String, List<EventListener>> map = new HashMap<String, List<EventListener>>();
+    
+	public EventManagement(){
+
+	}
+
+	/**
+	 * 向指定事件添加一个监听器
+	 * 
+	 * @param eventType 事件类型
+	 * @param listener 事件监听器
+	 * @return 添加成功返回true；添加失败返回false
+	 */
+	public boolean addListener(String eventType, EventListener listener){
+	    List<EventListener> listeners = map.get(eventType);
+	    if (null == listeners) {
+	        listeners = new ArrayList<EventListener>();
+        }
+	    boolean result = listeners.add(listener);
+	    map.put(eventType, listeners);
+	    
+		return result;
+	}
+
+	/**
+	 * 移除事件的某一个监听器
+	 * 
+	 * @param eventType 事件类型
+     * @param listener 事件监听器
+     * @return 移除成功返回true；移除失败返回false
+	 */
+	public boolean removeListener(String eventType, EventListener listener){
+	    List<EventListener> listeners = map.get(eventType);
+        if (null != listeners) {
+            return listeners.remove(listener);
+        }
+        
+		return false;
+	}
+
+	/**
+	 * 获取指定事件的监听器
+	 * 
+	 * @param eventType 事件类型
+	 * @return 如果指定的事件没有监听器返回null；否则返回监听器列表
+	 */
+	public List<EventListener> getEventListeners(String eventType) {
+	    return map.get(eventType);
+	}
+
+}

Java/JavaDemo/codedemo/eventdriver_improve/EventSource.java

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+package cn.aofeng.demo.eventdriver_improve;
+import java.util.List;
+
+/**
+ * 事件源(事件发送者)
+ * 
+ * @author aofeng <aofengblog@163.com>
+ */
+public class EventSource {
+
+    // 事件管理器
+    private EventManagement eventManagement;;
+    
+	public EventSource(EventManagement eventManagement){
+	    this.eventManagement = eventManagement;
+	}
+
+	/**
+     * 派发事件
+     * 
+     * @param data 事件
+     */
+    public void fire(Event event) {
+        if (null == event) {
+            return;
+        }
+        
+        List<EventListener> listeners = eventManagement.getEventListeners(event.getEventType());
+        if (null == listeners) {
+            return;
+        }
+        
+        for (EventListener listener : listeners) {
+            listener.execute(event);
+        }
+    }
+
+}