大侠 observer模式的例子，谢谢

[myself100]

比如用JAVA实现SOCKET通信，是不是有种更好的写法： 用observer模式，EVENT触发，消息通知？
求这方面的例子，不是要observer模式例子，而是和通信相关的例子

[believefym]

有时候observer也不一定好写，因为你不知道去怎么捕获事件
模拟起来很简单，比如server.receiveMsg(),然后触发，实际上收到消息这个事件在代码里不知道怎么实现

等待阻塞也许实现起来更简单
纯属个人意见，也没啥这方面经验

[myself100]

多谢，继续等待，肯定有人做过的～～

[NeverGiveUp2016]

Test.java

package com.bjsxt.dp.observer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;


class WakenUpEvent {
	private long time;
	private String loc;
	private Child source;
	
	public WakenUpEvent(long time, String loc, Child source) {
		super();
		this.time = time;
		this.loc = loc;
		this.source = source;
	}
	public long getTime() {
		return time;
	}
	public void setTime(long time) {
		this.time = time;
	}
	public String getLoc() {
		return loc;
	}
	public void setLoc(String loc) {
		this.loc = loc;
	}
	public Child getSource() {
		return source;
	}
	public void setSource(Child source) {
		this.source = source;
	}
}

class Child implements Runnable {
	private List<WakenUpListener> wakenUpListeners = new ArrayList<WakenUpListener>();

	public void addWakenUpListener(WakenUpListener l) {
		wakenUpListeners.add(l);
	}
	
	void wakeUp() {
		for(int i=0; i<wakenUpListeners.size(); i++) {
			WakenUpListener l = wakenUpListeners.get(i);
			l.ActionToWakenUp(new WakenUpEvent(System.currentTimeMillis(), "bed", this));
		}
	}

	public void run() {
		try {
			Thread.sleep(5000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		
		this.wakeUp();
	}
	
}

class Dad implements WakenUpListener {

	public void ActionToWakenUp(WakenUpEvent wakenUpEvent) {
		System.out.println("feed child");
	}
	
}

class GrandFather  implements WakenUpListener {

	public void ActionToWakenUp(WakenUpEvent wakenUpEvent) {
		System.out.println("hug child");
	}
	
}

class Dog implements WakenUpListener {

	public void ActionToWakenUp(WakenUpEvent arg0) {
		System.out.println("wang wang ...");
	}
	
}

interface WakenUpListener {
	public void ActionToWakenUp(WakenUpEvent wakenUpEvent);
}

public class Test {
	public static void main(String[] args) {
		Child c = new Child();
		
		
		String[] observers = PropertyMgr.getProperty("observers").split(",");

		for(String s : observers) {
			try {
				c.addWakenUpListener((WakenUpListener)(Class.forName(s).newInstance()));
			} catch (InstantiationException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			} catch (ClassNotFoundException e) {
				e.printStackTrace();
			}
		}
		
		
		new Thread(c).start();
	}
}

class PropertyMgr {
	private static Properties props = new Properties();
	
	static {
		try {
			props.load(Test.class.getClassLoader().getResourceAsStream("com/bjsxt/dp/observer/observer.properties"));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public static String getProperty(String key) {
		return props.getProperty(key);
	}
}

class CryEvent {
}

abstract class Event {

}

Test.java

package com.bjsxt.dp.observer.awt;

import java.util.ArrayList;
import java.util.List;


public class Test {
	public static void main(String[] args) {
		Button b = new Button();
		b.addActionListener(new MyActionListener());
		b.addActionListener(new MyActionListener2());
		b.buttonPressed();
	}
}

class Button {
	
	private List<ActionListener> actionListeners = new ArrayList<ActionListener>();
	
	public void buttonPressed() {
		ActionEvent e = new ActionEvent(System.currentTimeMillis(),this);
		for(int i=0; i<actionListeners.size(); i++) {
			ActionListener l = actionListeners.get(i);
			l.actionPerformed(e);
		}
	}
	
	public void addActionListener(ActionListener l) {
		actionListeners.add(l);
	}
}

interface ActionListener {
	public void actionPerformed(ActionEvent e);
}

class MyActionListener implements ActionListener {

	public void actionPerformed(ActionEvent e) {
		System.out.println("button pressed!");
	}
	
}

class MyActionListener2 implements ActionListener {

	public void actionPerformed(ActionEvent e) {
		System.out.println("button pressed 2!");
	}
	
}

class ActionEvent {
	
	long when;
	Object source;
	
	public ActionEvent(long when, Object source) {
		super();
		this.when = when;
		this.source = source;
	}
	
	
	public long getWhen() {
		return when;
	}

	public Object getSource() {
		return source;
	}
	
}

TestFrame.java

package com.bjsxt.dp.observer.awt;

import java.awt.Button;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestFrame extends Frame {
	public void launch() {
		Button b = new Button("press me");
		b.addActionListener(new MyActionListener());
		b.addActionListener(new MyActionListener2());
		this.add(b);
		this.pack();
		
		this.addWindowListener(new WindowAdapter(){

			@Override
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
			
		});
		
		this.setVisible(true);
	}
	
	public static void main(String[] args) {
		new TestFrame().launch();
	}
	
	private class MyActionListener implements ActionListener {

		public void actionPerformed(ActionEvent e) {
			System.out.println("button pressed!");
		}
		
	}
	
	private class MyActionListener2 implements ActionListener {

		public void actionPerformed(ActionEvent e) {
			System.out.println("button pressed 2!");
		}
		
	}
}

[NeverGiveUp2016]

把你帖子 从第二页 不起眼的地方顶起来，顶到第一页。

[myself100]

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