命令模式

最新推荐文章于 2025-09-05 14:41:09 发布

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最新推荐文章于 2025-09-05 14:41:09 发布

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文章标签：开发工具 java 系统架构

设计模式的意义在于：面向业务内容、业务数据结构和系统架构，高内聚低耦合、优雅的将平面逻辑立体化。

 1 package designPattern;
 2 /**
 3  * 命令模式
 4  * @author Administrator
 5  */
 6 public class B10_CommandTest {
 7 
 8     /**
 9      * @param args
10      */
11     public static void main(String[] args) {
12          Receiver rec = new Receiver();
13         Command cmd = new CommandImpl(rec);
14         Invoker i = new Invoker();
15         i.setCommand(cmd);
16         i.execute();
17     }
18 }
19 //command 声明执行操作的接口。
20 abstract class Command {    
21     protected Receiver receiver;    
22     public Command(Receiver receiver) {
23         this.receiver = receiver;
24     }    
25     public abstract void execute();
26 }
27 //concreteCommand  将一个接收者对象绑定于一个动作。调用接收者相应的操作，以实现Execute。
28 class CommandImpl extends Command {
29     public CommandImpl(Receiver receiver) {
30         super(receiver);
31     }
32     
33     public void execute() {
34         receiver.receive();
35     }
36 }
37 //invoker 要求该命令执行这个请求。
38 class Invoker {
39     private Command command;
40     
41     public void setCommand(Command command) {
42         this.command = command;
43     }
44     
45     public void execute() {
46         command.execute();
47     }
48 }
49 //receiver
50 class Receiver {
51 
52     public void receive() {
53         System.out.println("This is Receive class!");
54     }
55 }