二十三种设计模式全面解析-组合模式与享元模式的结合应用：实现对象的共享和高效管理

import java.util.HashMap;
import java.util.Map;
interface Component {
    void operation();
}
class ConcreteComponent implements Component {
    private String name;
    public ConcreteComponent(String name) {
        this.name = name;
    }
    @Override
    public void operation() {
        System.out.println("执行具体组件 " + name + " 的操作");
    }
}
class Composite implements Component {
    private Map<String, Component> components = new HashMap<>();
    public void addComponent(String key, Component component) {
        components.put(key, component);
    }
    public void removeComponent(String key) {
        components.remove(key);
    }
    @Override
    public void operation() {
        System.out.println("执行组合对象的操作");
        for (Component component : components.values()) {
            component.operation();
        }
    }
}
class ComponentFactory {
    private static Map<String, Component> componentMap = new HashMap<>();
    public static Component getComponent(String key) {
        Component component = componentMap.get(key);
        if (component == null) {
            component = new ConcreteComponent(key);
            componentMap.put(key, component);
        }
        return component;
    }
}
public class Client {
    public static void main(String[] args) {
        Composite composite = new Composite();
        composite.addComponent("A", ComponentFactory.getComponent("A"));
        composite.addComponent("B", ComponentFactory.getComponent("B"));
        composite.addComponent("C", ComponentFactory.getComponent("C"));
        composite.addComponent("A", ComponentFactory.getComponent("A"));
        composite.operation();
        // 输出：
        // 执行组合对象的操作
        // 执行具体组件 A 的操作
        // 执行具体组件 B 的操作
        // 执行具体组件 C 的操作
    }
}