Java 设计模式之命令模式

最新推荐文章于 2025-07-31 20:06:46 发布

原创最新推荐文章于 2025-07-31 20:06:46 发布 · 140 阅读

0 ·

CC 4.0 BY-SA版权

Java 同时被 2 个专栏收录

187 篇文章

订阅专栏

编程基础

178 篇文章

订阅专栏

本文介绍了一种基于Java的命令模式实现方法。通过定义Button类及其监听器接口，演示了如何响应用户点击事件，并通过Mouse类触发按钮的点击行为。此模式有助于将请求封装为对象，从而实现请求发送者和接收者的解耦。

http://www.verejava.com/?id=16999074395365

package com.command.theory;

import java.util.ArrayList;

public class TestCommand
{
	public static void main(String[] args)
	{
		Button btnOk=new Button("确定");
		Button btnCancel=new Button("取消");
		
		btnOk.addActionListener(new ActionListener(){

			@Override
			public void actionPerformed(ActionEvent e)
			{
				System.out.println("确定按钮被点击");
			}
			
		});
		btnCancel.addActionListener(new ActionListener(){

			@Override
			public void actionPerformed(ActionEvent e)
			{
				System.out.println("取消按钮被点击");
			}
			
		});
		
		Mouse m=new Mouse();
		m.click(btnOk);
		m.click(btnCancel);
	}
}





package com.command.theory;

public class Mouse
{
	public void click(Button btn)
	{
		ActionEvent e=new ActionEvent(btn.getText(),btn);
		btn.getActionListener().actionPerformed(e);
	}
}





package com.command.theory;

public class Button
{
	private ActionListener actionListener;
	private String text;
	public Button(String text)
	{
		super();
		this.text = text;
	}
	public ActionListener getActionListener()
	{
		return actionListener;
	}
	public void addActionListener(ActionListener actionListener)
	{
		this.actionListener = actionListener;
	}
	public String getText()
	{
		return text;
	}
	public void setText(String text)
	{
		this.text = text;
	}
	
	
}





package com.command.theory;

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





package com.command.theory;

public class ActionEvent
{
	private String name;
	private Object source;
	public ActionEvent(String name, Object source)
	{
		super();
		this.name = name;
		this.source = source;
	}
	public String getName()
	{
		return name;
	}
	public void setName(String name)
	{
		this.name = name;
	}
	public Object getSource()
	{
		return source;
	}
	public void setSource(Object source)
	{
		this.source = source;
	}
	
	
}

http://www.verejava.com/?id=16999074395365