Java Swing 树状组件JTree的使用方法（转）

import javax.swing.JFrame;

import javax.swing.JTree;

import javax.swing.event.TreeSelectionEvent;

import javax.swing.event.TreeSelectionListener;

import javax.swing.tree.DefaultMutableTreeNode;

public class TreeDemo {

    public static void main(String[] args) {

        // 创建没有父节点和子节点、但允许有子节点的树节点，并使用指定的用户对象对它进行初始化。

        // public DefaultMutableTreeNode(Object userObject)

        DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("软件部");

        node1.add(new DefaultMutableTreeNode(new User("小花")));

        node1.add(new DefaultMutableTreeNode(new User("小虎")));

        node1.add(new DefaultMutableTreeNode(new User("小龙")));

        DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("销售部");

        node2.add(new DefaultMutableTreeNode(new User("小叶")));

        node2.add(new DefaultMutableTreeNode(new User("小雯")));

        node2.add(new DefaultMutableTreeNode(new User("小夏")));

        DefaultMutableTreeNode top = new DefaultMutableTreeNode("职员管理");

        top.add(new DefaultMutableTreeNode(new User("总经理")));

        top.add(node1);

        top.add(node2);

        final JTree tree = new JTree(top);

        JFrame f = new JFrame("JTreeDemo");

        f.add(tree);

        f.setSize(300, 300);

        f.setVisible(true);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 添加选择事件

        tree.addTreeSelectionListener(new TreeSelectionListener() {

            @Override

            public void valueChanged(TreeSelectionEvent e) {

                DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree

                        .getLastSelectedPathComponent();

                if (node == null)

                    return;

                Object object = node.getUserObject();

                if (node.isLeaf()) {

                    User user = (User) object;

                    System.out.println("你选择了：" + user.toString());

                }

            }

        });

    }

}

class User {

    private String name;

    public User(String n) {

        name = n;

    }

    // 重点在toString，节点的显示文本就是toString

    public String toString() {

        return name;

    }

}