package com.test;
import java.util.ArrayList;
import java.util.List;
public class Main {
	public Main() {
		// TODO Auto-generated constructor stub
		ClassNode rootNode = new ClassNode(true, "", "", 1, 1, "IT数码");
		rootNode.setNodes(generaterNodes(rootNode, 2, "手机", "电脑", "平板"));
		rootNode.getNodes().get(0)
				.setNodes(generaterNodes(rootNode.getNodes().get(0), 3, "Android", "Apple", "WinPhone"));
		rootNode.getNodes().get(1).setNodes(generaterNodes(rootNode.getNodes().get(1), 3, "外星人", "苹果", "MicroSurface"));
		rootNode.getNodes().get(2).setNodes(generaterNodes(rootNode.getNodes().get(2), 3, "华为", "小米", "iPad"));
		List<ClassNode> nodes = new ArrayList<>();
		nodes.add(rootNode);
		showClassNode(rootNode, nodes);
	}
	private List<ClassNode> generaterNodes(ClassNode parent, int level, String... names) {
		List<ClassNode> nodes = new ArrayList<>();
		for (int i = 0; i < names.length; i++) {
			nodes.add(new ClassNode(parent, false, "", "", level, i + 1, names[i]));
		}
		return nodes;
	}
	public void showClassNode(ClassNode node, List<ClassNode> nodes) {
		if (!node.isRoot())
			printPlus(node.getLevel() - 1);
		System.out.println(node.toString());
		if (node.hasNodes()) {
			List<ClassNode> childNode = node.getNodes();
			for (ClassNode classNode : childNode) {
				showClassNode(classNode, childNode);
			}
		}
	}
	private void printPlus(int spaceNum) {
		for (int i = 0; i < spaceNum; i++)
			System.out.print("       ");
		System.out.print("├─");
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new Main();
	}
}

package com.test;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class ClassNode {
	/**
	 * 如IT数码,为根结点,那么level为1，下面有手机，电脑，level分别为2，2,position分别为1，2
	 */
	private boolean root;// 是否根结点
	private String id;// 用户编号
	private String sid;// 系统编号
	private int level;// 当前所在级别
	private int position;// 当前级别位置
	private String name;// 当前级别名称
	private List<ClassNode> nodes;
	private ClassNode parent;// 父亲节点
	public ClassNode(boolean root, String id, String sid, int level, int position, String name) {
		this(null, root, id, sid, level, position, name, null);
	}
	public ClassNode(boolean root, String id, String sid, int level, int position, String name, List<ClassNode> nodes) {
		this(null, root, id, sid, level, position, name, nodes);
	}
	public ClassNode(ClassNode parent, boolean root, String id, String sid, int level, int position, String name) {
		this(parent, root, id, sid, level, position, name, null);
	}
	public ClassNode(ClassNode parent, boolean root, String id, String sid, int level, int position, String name,
			List<ClassNode> nodes) {
		super();
		this.parent = parent;
		this.root = root;
		this.id = id;
		this.sid = sid;
		this.level = level;
		this.position = position;
		this.name = name;
		this.nodes = nodes;
	}
	public boolean isRoot() {
		return root;
	}
	public void setRoot(boolean root) {
		this.root = root;
	}
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getSid() {
		return sid;
	}
	public void setSid(String sid) {
		this.sid = sid;
	}
	public int getLevel() {
		return level;
	}
	public void setLevel(int level) {
		this.level = level;
	}
	public int getPosition() {
		return position;
	}
	public void setPosition(int position) {
		this.position = position;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public List<ClassNode> getNodes() {
		return nodes;
	}
	public void setNodes(List<ClassNode> nodes) {
		this.nodes = nodes;
	}
	public boolean hasNodes() {
		return nodes != null && nodes.size() > 0;
	}
	public ClassNode getParent() {
		return parent;
	}
	public void setParent(ClassNode parent) {
		this.parent = parent;
	}
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		StringBuffer buffer = new StringBuffer();
		List<String> strings = new ArrayList<>();
		buffer.append(getName());
		buffer.append("[");
		ClassNode parent = this.parent;
		while (parent != null) {
			StringBuffer sb = new StringBuffer();
			sb.append(parent.getLevel());
			sb.append("-");
			sb.append(parent.getPosition());
			sb.append("-");
			strings.add(sb.toString());
			parent = parent.getParent();
		}
		Collections.reverse(strings);//反转
		for (String string : strings) {
			buffer.append(string);
		}
		buffer.append(getLevel());
		buffer.append("-");
		buffer.append(getPosition());
		buffer.append("]");
		return buffer.toString();
	}
}

本文链接:https://www.it72.com/10062.htm