组合模式实例商品类别树

àì夳堔傛蜴生んèń 2023-10-06 09:21 24阅读 0赞

1.题目：  
有一个根节点，比如“服装”，它没有父节点，它可以包含其他的节点。  
树枝节点，有一类节点可以包含其他的节点，称之为树枝节点，比如“男装”、“女装”和“母婴”。  
叶子节点，有一类节点没有子节点，称之为叶子节点，比如“衬衣”、“夹克”、“裙子”、“套装”等。  
如果碰到类似上面这种，需使用对象树来描述或实现的功能，都可以考虑使用组合模式，比如读取XML文件，或是对语句进行语法解析等。  
2.UML图  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1NzE5NjEz_size_16_color_FFFFFF_t_70]  
3.代码

package 组合模式;
    
    public abstract class Cloth {
        
    
    protected String name;
    public Cloth(String name)
    {
        this.name=name;
    }
    public abstract void Add(Cloth c);
    public abstract void Remove(Cloth c);
    public abstract void display(String str);
    }

package 组合模式;
    
    import java.util.ArrayList;
    public class ConcreteCloth extends Cloth {
        
    
    	private ArrayList<Cloth>children=new ArrayList<Cloth>();
    	public ConcreteCloth(String name)
    	{
        
    		super(name);
    	}
    	@Override
    	public void Add(Cloth c) {
        
    		children.add(c);
    	}
     
    	@Override
    	public void Remove(Cloth c) {
        
    		children.remove(c);
    	}
     
    	@Override
    	public void display(String str) {
        
    		str+="-";
    		System.out.println(str+name);
    		for(Cloth component:children)
    		{
        component.display(str);
    		}
    	}
    }

package 组合模式;
    
    public class Custome extends Cloth {
        
    	public Custome(String name) {
        
    		super(name);
    	}
     
    	@Override
    	public void Add(Cloth c) {
         
    	}
     
    	@Override
    	public void Remove(Cloth c) {
        
    	}
     
    	@Override
    	public void display(String str) {
        
    	str+="-";
    	System.out.println(str+name);
     
    	}
    
    }

package 组合模式;
    
    public class Jacket extends Cloth {
        
    
    	public Jacket(String name) {
        
    		super(name);
    	}
    
    	@Override
    	public void Add(Cloth c) {
        
    	}
    
    	@Override
    	public void Remove(Cloth c) {
        
    	}
    
    	@Override
    	public void display(String str) {
        
    		str+="-";
    		System.out.println(str+name);
    
    	}
    
    }

package 组合模式;
    
    public class Shirt extends Cloth {
        
    
    	public Shirt(String name) {
        
    		super(name);
    		// TODO Auto-generated constructor stub
    	}
    
    	@Override
    	public void Add(Cloth c) {
        
    		// TODO Auto-generated method stub
    
    	}
    
    	@Override
    	public void Remove(Cloth c) {
        
    		// TODO Auto-generated method stub
    
    	}
    
    	@Override
    	public void display(String str) {
        
    		str+="-";
    		System.out.println(str+name);
    	}
    
    }

package 组合模式;
    
    public class Skirt extends Cloth {
        
    
    	public Skirt(String name) {
        
    		super(name);
    		// TODO Auto-generated constructor stub
    	}
    
    	@Override
    	public void Add(Cloth c) {
        
    		// TODO Auto-generated method stub
    
    	}
    
    	@Override
    	public void Remove(Cloth c) {
        
    		// TODO Auto-generated method stub
    
    	}
    
    	@Override
    	public void display(String str) {
        
    		str+="-";
    		System.out.println(str+name);
    	}
    
    }

package 组合模式;
    
    public class Test {
        
    
    	public static void main(String[] args) {
        
    		ConcreteCloth root=new ConcreteCloth("服装");
    		ConcreteCloth comp1=new ConcreteCloth("男装");
    		ConcreteCloth comp2=new ConcreteCloth("女装");
    		comp1.Add(new  Shirt("衬衫"));
    		comp1.Add(new Jacket("夹克"));
    		comp2.Add(new Skirt("裙子"));
    		comp2.Add(new Custome("礼服"));
    			root.Add(comp1);
    			root.Add(comp2);
    			root.display("");
    	}
    
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1NzE5NjEz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200522211459278.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1NzE5NjEz,size_16,color_FFFFFF,t_70