用Java实现简单树结构

Node实体：

package treeTest;

import java.io.Serializable;
import java.util.List;

/**
 * ClassName: Node 
 * @Description: 节点类
 * @author SHICC
 * @date 2018年2月7日
 */
@SuppressWarnings("serial")
public class Node<T> implements Serializable {

	protected Node<T> parentNode;
	protected T nodeEntity;
	protected List<Node<T>> childNodes;
	
	public void setParentNode(Node<T> parentNode) {
		this.parentNode = parentNode;
	}
	
	public Node<T> getParentNode() {
		return parentNode;
	}

	public void setNodeEntity(T nodeEntity) {
		this.nodeEntity = nodeEntity;
	}
	
	public T getNodeEntity() {
		return nodeEntity;
	}
	
	public void setChildNodes(List<Node<T>> childNodes) {
		this.childNodes = childNodes;
	}
	
	public List<Node<T>> getChildNodes() {
		return childNodes;
	}
	
}
package treeTest;

import java.io.