设计模式之装饰模式

最新推荐文章于 2025-07-28 14:21:22 发布

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文章标签：

#设计模式 #decorator #class #function #interface #string

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本文深入探讨了装饰器模式在组件设计中的应用，通过实例展示了如何使用装饰器来扩展组件的功能，同时保持代码的清晰和可维护性。具体介绍了组件、混凝土组件、装饰器和两个具体装饰器类的实现，最后通过客户端代码演示了如何组合这些组件和装饰器。

Component

public interface Component {
	public void doSomething();
}

ConcreteComponent

public class ConcreteComponent implements Component {

	@Override
	public void doSomething() {
		System.out.println("Function ");
	}

}

Decorator

public class Decorator implements Component {

	private Component component;
	
	public Decorator(Component component){
		this.component = component;
	}
	
	@Override
	public void doSomething() {
		this.component.doSomething();
	}
}

ConcreteDecorator1

public class ConcreteDecorator1 extends Decorator {

	public ConcreteDecorator1(Component component) {
		super(component);
	}
	
	@Override
	public void doSomething(){
		super.doSomething();
		doAnotherthing();
	}
	
	private void doAnotherthing(){
		System.out.println("Function 1");
	}

}

ConcreteDecorator2

public class ConcreteDecorator2 extends Decorator {

	public ConcreteDecorator2(Component component) {
		super(component);
	}
	
	@Override
	public void doSomething(){
		super.doSomething();
		doAnotherthing();
	}
	
	private void doAnotherthing(){
		System.out.println("Function 2");
	}

}

Client

public class Client {

	public static void main(String[] args) {
		Component component = new ConcreteComponent();
		
		Component component2 = new ConcreteDecorator1(component);
		
		Component component3 = new ConcreteDecorator2(component2);
		
		component3.doSomething();
	}

}