抽象构件
public abstract class Component {
   //个体和整体都具有的共享
   public void do Something(){
       //编写业务逻辑
   }
}

public class Composite extends Component {
   //构件容器
   private Array List<component> component Array List = new Array List<component>()
   //增加一个叶子构件或树枝构件
   public void add(Component component){
       this.component Array List.add(component);
   }
   //删除一个叶子构件或树枝构件
   public void remove(Component component){
       this.component Array List.remove(component);
   }  
 //获得分支下的所有叶子构件和树枝构件
   public Array List<component> get Children(){
       return this.component Array List;
   }
}

树叶构件
public class Leaf extends Component {
   /*
   * 
可以覆写父类方法
   * public void do Something(){
   * 
   * }
   */
}

public class Client {
   public static void main(String[] args) {
      //创建一个根节点
       Composite root = new Composite();
       root.do Something();
       //创建一个树枝构件
       Composite branch = new Composite();
       //创建一个叶子节点
       Leaf leaf = new Leaf();
       //建立整体
       root.add(branch);
       branch.add(leaf);     
   }
   //通过递归遍历树
   public static void display(Composite root){
       for(Component c:root.get Children()){
         if(c instanceof Leaf){ //叶子节点
             c.do Something();
         }else{ //树枝节点
             display((Composite)c);
         }
       }
   }
}