[Java]Swing树状组件JTree

一 简单样式

TreeNodeDemo.java

package com.sjf;

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 TreeNodeDemo {


    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 group1 = new DefaultMutableTreeNode("软件部");

        TreeNode node1 = new TreeNode();
        node1.setName("王雨");
        node1.setNickName("漫天飞舞");
        group1.add(new DefaultMutableTreeNode(node1));

        TreeNode node2 = new TreeNode();
        node2.setName("陈梦");
        node2.setNickName("梦");
        group1.add(new DefaultMutableTreeNode(node2));

        TreeNode node3 = new TreeNode();
        node3.setName("上官飞儿");
        node3.setNickName("飞儿");
        group1.add(new DefaultMutableTreeNode(node3));

        DefaultMutableTreeNode group2 = new DefaultMutableTreeNode("销售部");

        TreeNode node4 = new TreeNode();
        node4.setName("上官婉儿");
        node4.setNickName("婉儿");
        group2.add(new DefaultMutableTreeNode(node4));

        TreeNode node5 = new TreeNode();
        node5.setName("上官巧儿");
        node5.setNickName("巧儿");
        group2.add(new DefaultMutableTreeNode(node5));


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

        top.add(group1);
        top.add(group2);

        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;
                }//if

                Object object = node.getUserObject();
                TreeNode user = (TreeNode) object;
                System.out.println("你选择了：" + user.toString());
            }
        });
    }
}

TreeNode.java

package com.sjf;

public class TreeNode {
    private String nickName = "";
    private String name = "";
    private String phone = "";
    private int age;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getNickName() {
        return nickName;
    }
    public void setNickName(String nickName) {
        this.nickName = nickName;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    // 重点在toString，节点的显示文本就是toString  
    public String toString()
    {
        return name + "["+nickName+"]";
    }
}

二 图标样式

TreeNode.java

package com.sjf;

public class TreeNode {
    private String nickName = "";
    private String name = "";
    private String phone = "";
    private int age;
    private String imagePath = "";

    public String getImagePath() {
        return imagePath;
    }
    public void setImagePath(String imagePath) {
        this.imagePath = imagePath;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getNickName() {
        return nickName;
    }
    public void setNickName(String nickName) {
        this.nickName = nickName;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    // 重点在toString，节点的显示文本就是toString  
    public String toString()
    {
        return name + "["+nickName+"]";
    }
}

TreeCellRenderer.java

package com.sjf;

import java.awt.Component;
import javax.swing.ImageIcon;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;

/**
 * 自定义树描述类,将树的每个节点设置成不同的图标
 *
 */
public class TreeCellRenderer extends DefaultTreeCellRenderer{

    private static final long   serialVersionUID    = 1L;
    /**
     * 重写父类DefaultTreeCellRenderer的方法
     */
    @Override
    public Component getTreeCellRendererComponent(JTree tree, Object value,
            boolean selected, boolean expanded, boolean isLeaf, int row,boolean hasFocus)
    {
        // 选中
        if (selected)
        {
            setForeground(getTextSelectionColor());
        }
        else
        {
            setForeground(getTextNonSelectionColor());
        }
        // TreeNode
        DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) value;

        Object obj = treeNode.getUserObject();

        if (obj instanceof TreeNode) 
        {
            TreeNode node = (TreeNode) obj;
            DefaultTreeCellRenderer tempCellRenderer = new DefaultTreeCellRenderer();
            tempCellRenderer.setLeafIcon(new ImageIcon(node.getImagePath()));
            return tempCellRenderer.getTreeCellRendererComponent(tree, node.toString(), selected, expanded, true, row, hasFocus);
        } 
        else if (obj instanceof String) 
        {
            String text = (String) obj;
            DefaultTreeCellRenderer tempCellRenderer = new DefaultTreeCellRenderer();
            tempCellRenderer.setOpenIcon(new ImageIcon("Image/open.jpg"));
            tempCellRenderer.setClosedIcon(new ImageIcon("Image/close.jpg"));
            return tempCellRenderer.getTreeCellRendererComponent(tree, text, selected, expanded, false, row, hasFocus);
        } 
        return super.getTreeCellRendererComponent(tree, value, selected, expanded, isLeaf, row, hasFocus);
    }
}

TreeNodeDemo.java

package com.sjf;

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 TreeNodeDemo {


    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 group1 = new DefaultMutableTreeNode("软件部");

        TreeNode node1 = new TreeNode();
        node1.setName("王雨");
        node1.setNickName("漫天飞舞");
        node1.setImagePath("Image/1.jpg");
        group1.add(new DefaultMutableTreeNode(node1));

        TreeNode node2 = new TreeNode();
        node2.setName("陈梦");
        node2.setNickName("梦");
        node2.setImagePath("Image/2.jpg");
        group1.add(new DefaultMutableTreeNode(node2));

        TreeNode node3 = new TreeNode();
        node3.setName("上官飞儿");
        node3.setNickName("飞儿");
        node3.setImagePath("Image/3.jpg");
        group1.add(new DefaultMutableTreeNode(node3));

        DefaultMutableTreeNode group2 = new DefaultMutableTreeNode("销售部");

        TreeNode node4 = new TreeNode();
        node4.setName("上官婉儿");
        node4.setNickName("婉儿");
        node4.setImagePath("Image/4.jpg");
        group2.add(new DefaultMutableTreeNode(node4));

        TreeNode node5 = new TreeNode();
        node5.setName("上官巧儿");
        node5.setNickName("巧儿");
        node5.setImagePath("Image/5.jpg");
        group2.add(new DefaultMutableTreeNode(node5));


        DefaultMutableTreeNode root = new DefaultMutableTreeNode();
        root.add(group1);
        root.add(group2);
        //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
        final JTree tree = new JTree(root);
        tree.setCellRenderer(new TreeCellRenderer());
        tree.putClientProperty("JTree.lineStyle", "None");
        tree.setRootVisible(false);

        JFrame frame = new JFrame("JTreeDemo");
        frame.add(tree);
        frame.setSize(300, 300);
        frame.setVisible(true);
        frame.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;
                }//if

                Object object = node.getUserObject();
                if(object instanceof TreeNode)
                {
                    TreeNode user = (TreeNode) object;
                    System.out.println("你点击了：" + user.toString());
                }
                else if(object instanceof String)
                {
                    String text = (String)object;
                    System.out.println("你点击了：" + text);
                }
            }
        });
    }
}

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