Node實體：

package treeTest;

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

/**
 * ClassName: Node 
 * @Description: 節點類
 * @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.util.ArrayList;

/**
 * ClassName: TreeNode 
 * @Description: 樹實現類
 * @author SHICC
 * @date 2018年2月7日
 */
@SuppressWarnings("serial")
public class TreeNode<T> extends Node<T>{
	
	public TreeNode() {
	}
	
	public TreeNode(T nodeEntity) {
		super();
		super.nodeEntity = nodeEntity;
	}

	protected void addChildNode(Node<T> childNode) {
		childNode.setParentNode(this);
		if(childNodes == null) {
			childNodes = new ArrayList<Node<T>>();
		} 
		this.childNodes.add(childNode);
	}

	protected void removeChildNode(Node<T> childNode) {
		if(childNodes != null) {
			childNodes.remove(childNode);
		}
		
	}
	
	public void display(Node<T> treeNode, int depth) {
		StringBuilder sb = new StringBuilder("");  
        for(int i = 0; i < depth; i++) {  
            sb.append("-");  
        }  
        if(treeNode.parentNode == null) {
        	System.out.println(treeNode.getNodeEntity().toString());
        }
        for(Node<T> childNode : treeNode.getChildNodes()) { 
        	System.out.println(new String(sb) + childNode.getNodeEntity().toString());
        	if(childNode.getChildNodes() != null) {
        		display(childNode, depth + 2);
        	}
        } 
		
	}

}
 

package treeTest;

/**
 * ClassName: LeafNode 
 * @Description: 子葉實現類
 * @author SHICC
 * @date 2018年2月7日
 */
@SuppressWarnings("serial")
public class LeafNode<T> extends Node<T> {

	public LeafNode() {
	}
	
	public LeafNode(T nodeEntity) {
		super();
		super.nodeEntity = nodeEntity;
	}
	
	public void display(Node<T> treeNode, int depth) {
		StringBuilder sb = new StringBuilder("");  
        for(int i = 0; i < depth; i++) {  
            sb.append("-");  
        }  
        System.out.println(new String(sb) + treeNode.getNodeEntity().toString());
	}
}
 

package treeTest;

public class Company {

	private String name;
	private String address;
	private String tel;
	
	public Company(String name, String address, String tel) {
		this.name = name;
		this.address = address;
		this.tel = tel;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	public String getTel() {
		return tel;
	}
	public void setTel(String tel) {
		this.tel = tel;
	}
	@Override
	public String toString() {
		return "Company [name=" + name + ", address=" + address + ", tel="
				+ tel + "]";
	}
	
}

package treeTest;

public class Test {

	public static void main(String[] args) {
		Company company = new Company("久遠銀海成都總公司", "成都", "5175276");
		Company company1 = new Company("久遠銀海上海分公司", "上海", "5175276");
		Company company2 = new Company("久遠銀海重慶分公司", "重慶", "5175276");
		Company company3 = new Company("久遠銀海西安分公司", "西安", "5175276");
		Company company4 = new Company("久遠銀海重慶江北分公司", "重慶江北", "5175276");
		Company company5 = new Company("久遠銀海重慶江北分公司槐樹街辦事處", "重慶江北", "5175276");
		Company company6 = new Company("久遠銀海重慶江北分公司大豐路辦事處", "重慶江北", "5175276");
		TreeNode<Company> root = new TreeNode<Company>(company);
		TreeNode<Company> c1 = new TreeNode<Company>(company1);
		TreeNode<Company> c2 = new TreeNode<Company>(company2);
		TreeNode<Company> c3 = new TreeNode<Company>(company3);
		TreeNode<Company> c4 = new TreeNode<Company>(company4);
		LeafNode<Company> l1 = new LeafNode<Company>(company5);
		LeafNode<Company> l2 = new LeafNode<Company>(company6);
		root.addChildNode(c1);
		root.addChildNode(c2);
		root.addChildNode(c3);
		c2.addChildNode(c4);
		c4.addChildNode(l1);
		c4.addChildNode(l2);
		root.display(root, 2);

		TreeNode<String> root1 = new TreeNode<String>("中國");
		TreeNode<String> r1 = new TreeNode<String>("四川");
		TreeNode<String> r2 = new TreeNode<String>("廣東");
		TreeNode<String> r3 = new TreeNode<String>("成都");
		TreeNode<String> r4 = new TreeNode<String>("瀘州");
		TreeNode<String> r5 = new TreeNode<String>("廣州");
		root1.addChildNode(r1);
		root1.addChildNode(r2);
		r1.addChildNode(r3);
		r1.addChildNode(r4);
		r2.addChildNode(r5);
		root1.display(root1, 2);
		
	}
	

}