命令模式
2008-03-05 00:27
225 查看
1 命令的接受者和其命令动作：
public class Receiver
...{
public Receiver()
...{
//write code here
}
public void action()
...{
System.out.println("Action has been taken.");
}
}
2 抽象命令
public interface Command ...{
void execute();
}
3 具体命令的对象绑定和执行
public class ConcreteCommand implements Command
...{
public ConcreteCommand(Receiver receiver)
...{
this.receiver = receiver;
}
public void execute()
...{
receiver.action();
}
/** *//**
* @directed
* @clientRole receiver
*/
private Receiver receiver;
}
4 请求者的命令调用
public class Invoker
...{
public Invoker(Command command)
...{
this.command = command;
}
public void action()
...{
command.execute();
}
/** *//**
* @link aggregation
* @directed
*/
private Command command;
}
5 客户端调用
public class Client
...{
public static void main(String[] args)
...{
// 创建命令的接受者
Receiver receiver = new Receiver();
// 命令对象 指定接受者
Command command = new ConcreteCommand(receiver);
//命令执行对象 设定命令
Invoker invoker = new Invoker( command );
//执行命令
invoker.action();
}
/** *//** @link dependency */
/**//*#Receiver lnkReceiver;*/
/** *//** @link dependency */
/**//*#Invoker lnkInvoker;*/
}
init:
deps-jar:
compile-single:
run-single:
Action has been taken.
生成成功（总时间：1 秒）
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