package TreeView;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.LookAndFeel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;

import com.incors.plaf.alloy.AlloyLookAndFeel;

public class Tree {
public Tree(){
JFrame f = new JFrame("TreeDemo");
Container contentPane = f.getContentPane();

DefaultMutableTreeNode root = new DefaultMutableTreeNode("资源管理器");
DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("我的公文包");
DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("我的电脑");
DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("收藏夹");
DefaultMutableTreeNode node4 = new DefaultMutableTreeNode("Readme");
DefaultTreeModel treeModel = new DefaultTreeModel(root);
treeModel.insertNodeInto(node1, root, root.getChildCount());
treeModel.insertNodeInto(node2, root, root.getChildCount());
treeModel.insertNodeInto(node3, root, root.getChildCount());
treeModel.insertNodeInto(node4, root, root.getChildCount());

DefaultMutableTreeNode leafnode = new DefaultMutableTreeNode("公司文件");
treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
leafnode = new DefaultMutableTreeNode("个人信件");
treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
leafnode = new DefaultMutableTreeNode("私人文件");
treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());

leafnode = new DefaultMutableTreeNode("本机磁盘(C:)");
treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
leafnode = new DefaultMutableTreeNode("本机磁盘(D:)");
treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
leafnode = new DefaultMutableTreeNode("本机磁盘(E:)");
treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());

DefaultMutableTreeNode node31 = new DefaultMutableTreeNode("网站列表");
treeModel.insertNodeInto(node31, node3, node3.getChildCount());
leafnode = new DefaultMutableTreeNode("奇摩站");
treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
leafnode = new DefaultMutableTreeNode("职棒消息");
treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
leafnode = new DefaultMutableTreeNode("网络书店");
treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
try {
LookAndFeel alloyLnF = new AlloyLookAndFeel();
UIManager.setLookAndFeel(alloyLnF);
} catch (UnsupportedLookAndFeelException ex) {
// You may handle the exception here
}
// this line needs to be implemented in order to make JWS work properly
UIManager.getLookAndFeelDefaults().put("ClassLoader",
getClass().getClassLoader());

JTree tree = new JTree(treeModel);
tree.setRowHeight(20);
DefaultTreeCellRenderer cellRenderer = (DefaultTreeCellRenderer) tree
.getCellRenderer();
cellRenderer.setLeafIcon(new ImageIcon("icons\\117.jpg"));
cellRenderer.setOpenIcon(new ImageIcon("icons\\117.jpg"));
cellRenderer.setClosedIcon(new ImageIcon("icons\\116.jpg"));

cellRenderer.setFont(new Font("宋体", Font.PLAIN, 12));// 设置字体.
cellRenderer.setBackgroundNonSelectionColor(Color.white);
cellRenderer.setBackgroundSelectionColor(Color.yellow);
cellRenderer.setBorderSelectionColor(Color.red);
/*
* 设置选时或不选时，文字的变化颜色
*/
cellRenderer.setTextNonSelectionColor(Color.black);
cellRenderer.setTextSelectionColor(Color.blue);

JScrollPane scrollPane = new JScrollPane();
scrollPane.setViewportView(tree);

contentPane.add(scrollPane);
f.pack();
f.setVisible(true);

f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
public static void main(String[] args) {

Tree tree =new Tree();
}
}

参考资料：

From：http://www.iteedu.com/plang/java/jtswingchxshj/57.php

java JTree 树形控件展示