设计模式（装饰模式）

public interface Product {
    public void addAttribute();
}

public class ProductImpl implements Product {

    @Override
    public void addAttribute() {
        System.out.println("Add base Attribute");
    }
}

public class BaseChange implements Product {
    
    private Product product;
    
    public BaseChange(Product product){
        this.product = product;
    }

    @Override
    public void addAttribute() {
        product.addAttribute();
    }
}

public class OneChange extends BaseChange {

    public OneChange(Product product) {
        super(product);
    }
    
    @Override
    public void addAttribute() {
        super.addAttribute();
        System.out.println("One Change");
    }
}

public class TwoChange extends BaseChange {
    
    public TwoChange(Product product) {
        super(product);
    }
    
    @Override
    public void addAttribute() {
        super.addAttribute();
        System.out.println("Two Change");
    }
}

public class App {

    public static void main(String[] args) {
        Product product = new ProductImpl();
        
        Product change = new TwoChange(new OneChange(product));
        change.addAttribute();
    }

}

Add base Attribute
One Change
Two Change