组合模式实例商品类别树

Twcat_tree

发布于 2022-11-30 17:15:58

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发布于 2022-11-30 17:15:58

文章被收录于专栏：二猫の家

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

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("");
	}

}

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原始发表：2020-05-22，如有侵权请联系 cloudcommunity@tencent.com 删除

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