JTree demo

 

JFrame居中
方法一：  
setLocationRelativeTo(null); 

注意：必須在整個frame初始化完成後再加上此語句，不然將顯示在屏幕右下角

方法二：
private Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();  
/** 屏幕寬度 */ 
private int screenWidth = screenSize.width;  
/** 屏幕高度 */ 
private int screenHeight = screenSize.height;  
jFrame.setLocation((screenWidth - FRAME_WIDTH) / 2, (screenHeight - FRAME_HEIGHT) / 2);

 

package component.tree;

import java.awt.Dialog;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;

import javax.swing.JDialog;
import javax.swing.JTree;

/*2015-5-26*/
public class MyDialog extends JDialog{

    private JTree tree=new JTree();
    public MyDialog(Dialog owner) {
        super(owner,true);
        setSize(800,600);
        add(tree);
        setLocation(getCenterPoint());
    }
    
    private Point getCenterPoint(){
        int windowWidth = this.getWidth(); //得到窗口寬
         
        int windowHeight = this.getHeight(); //得到窗口高
         
        Toolkit kit = Toolkit.getDefaultToolkit(); //定義工具包
         
        Dimension screenSize = kit.getScreenSize(); //獲取屏幕的尺寸
         
        int screenWidth = screenSize.width; //獲取屏幕的寬
         
        int screenHeight = screenSize.height; //獲取屏幕的高
         return new Point(screenWidth / 2 - windowWidth / 2,  screenHeight / 2 - windowHeight / 2);//窗口居中時的x，y

    }
    
    public JTree getTree() {
        return tree;
    }

    
    
}

 

package component.tree;

import static common.SwingConsole.run;

import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;

/*2015-5-26*/
public class Main extends JFrame {
    
    public Main() throws HeadlessException {
        super();
        JButton button=new JButton("OK");
        button.addActionListener(new ActionListener() {
            
            @Override
            public void actionPerformed(ActionEvent e) {
                MyDialog dlg=new MyDialog(null);
                
                DefaultMutableTreeNode root = new DefaultMutableTreeNode("資源管理器");
                DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("個人公文包");
                DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("個人電腦");
                DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("收藏夾");
                DefaultMutableTreeNode node4 = new DefaultMutableTreeNode("Readme");

                DefaultTreeModel treeModel = new DefaultTreeModel(root);

                /*
                 * DefaultTreeModel類所提供的insertNodeInto()方法加入節點到父節點的數量.
                 * 利用DefaultMutableTreeNode類所提供的getChildCount()方法取得目前子節點的數量.
                 */
                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");

                // DefaultTreeModel類所提供的insertNodeInto()方法加入節點到父節點的數量.
                treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
                leafnode = new DefaultMutableTreeNode("我的信件");
                treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());
                leafnode = new DefaultMutableTreeNode("私人文件");
                treeModel.insertNodeInto(leafnode, node1, node1.getChildCount());

                leafnode = new DefaultMutableTreeNode("本機磁盤(C:)");
                treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
                leafnode = new DefaultMutableTreeNode("本機磁盤(D:)");
                treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());
                leafnode = new DefaultMutableTreeNode("本機磁盤(E:)");
                treeModel.insertNodeInto(leafnode, node2, node2.getChildCount());

                DefaultMutableTreeNode node31 = new DefaultMutableTreeNode("網站列表");
                treeModel.insertNodeInto(node31, node3, node3.getChildCount());
                leafnode = new DefaultMutableTreeNode("奇摩站");
                treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
                leafnode = new DefaultMutableTreeNode("職棒消息");
                treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
                leafnode = new DefaultMutableTreeNode("網絡書店");
                treeModel.insertNodeInto(leafnode, node3, node3.getChildCount());
                
                dlg.getTree().setModel(treeModel);
                dlg.setVisible(true);
            }
        });
        add(button);
    }

    public static void main(String[] args) {
        run(new Main(),200,100);
    }

}

package common;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

/*2015-5-26*/
public class SwingConsole {

    public static void run(final JFrame frame,final int width,final int height){
        SwingUtilities.invokeLater(new Runnable() {
            
            @Override
            public void run() {
                frame.setSize(width, height);
                frame.setTitle(frame.getClass().getSimpleName());
                frame.setVisible(true);
            }
        });
    }
}

 

 

http://www.iteedu.com/plang/java/jtswingchxshj/56.php

http://www.blogjava.net/santicom/archive/2011/03/23/346796.html

http://www.cnblogs.com/happyPawpaw/archive/2013/01/10/2854675.html

http://etwo.iteye.com/blog/1458414

 

 

 

package swing.tree;

import static common.SwingConsole.run;

import javax.swing.JFrame;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
/*2015-6-1*/
public class JTreeDemo extends JFrame{
    private static final long serialVersionUID = 1L;

    public JTreeDemo() {
        JTree tree=new JTree();
        
/*        DefaultMutableTreeNode root=new DefaultMutableTreeNode("個人電腦");
        DefaultMutableTreeNode c=new DefaultMutableTreeNode("C:");
        DefaultMutableTreeNode d=new DefaultMutableTreeNode("D:");
        
        DefaultMutableTreeNode c1=new DefaultMutableTreeNode("C1");
        DefaultMutableTreeNode c2=new DefaultMutableTreeNode("C2");*/
        
        Dir dir=new Dir("root", "My computer", "Y");
        Dir c=new Dir("C:", "第一個盤", "N");
        Dir d=new Dir("D:", "第二個盤", "Y");
        Dir c1=new Dir("c1", "盤一C1", "Y");
        Dir c2=new Dir("c2", "盤一C2", "Y");
        
        DefaultMutableTreeNode root=new DefaultMutableTreeNode(dir);
        DefaultMutableTreeNode cNode=new DefaultMutableTreeNode(c);
        DefaultMutableTreeNode dNode=new DefaultMutableTreeNode(d);
        
        DefaultMutableTreeNode c1Node=new DefaultMutableTreeNode(c1);
        DefaultMutableTreeNode c2Node=new DefaultMutableTreeNode(c2);
        
        
        DefaultTreeModel model=new DefaultTreeModel(root);
        model.insertNodeInto(cNode, root, root.getChildCount());
        model.insertNodeInto(dNode, root, root.getChildCount());
        model.insertNodeInto(c1Node, cNode,cNode.getChildCount());
        model.insertNodeInto(c2Node, cNode, cNode.getChildCount());
        
        tree.setModel(model);
        
        this.add(tree);
        tree.setSize(400, 200);
        
    }
    
    public static void main(String[] args) {
        run(new JTreeDemo(), 800, 600);
    }

}

class Dir{
    private String path;
    private String name;
    private String access;
    public Dir(String path, String name, String access) {
        super();
        this.path = path;
        this.name = name;
        this.access = access;
    }
    
    @Override
    public String toString() {
        return path;//GUI上樹顯示的節點信息
    }
    
}

 

 

package swing.tree;

import static common.SwingConsole.run;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;

import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.border.Border;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;

import com.sun.security.auth.UserPrincipal;

/*2015-6-1*/
public class JTreeDemo extends JFrame {
    private static final long serialVersionUID = 1L;

    private JTree tree;
    private DefaultMutableTreeNode root;
    private DefaultTreeModel model;
    private JPanel content;

    private Border inBorder = BorderFactory.createLineBorder(Color.LIGHT_GRAY);

    public JTreeDemo() {
        initGUI();
        initListener();
    }

    private void initGUI() {
        content = new JPanel();
        content.setLayout(new BorderLayout());
        getContentPane().add(content);
        root = new DefaultMutableTreeNode();
        model = new DefaultTreeModel(root);

        for (int i = 1; i <= 3; i++) {
            DemoNode cate = new DemoNode(produceImage("arrow_left.png"), new UserPrincipal("個人好友" + i));
            for (int j = 1; j <= 3; j++) {
                DemoNode node = new DemoNode(produceImage("avatar.png"), new UserPrincipal("好友" + i + "-" + j), "人生若只如初見");
                cate.add(node);
            }
            root.add(cate);
        }

        tree = new JTree();
        tree.setModel(model);
        tree.setRootVisible(false);
        tree.setToggleClickCount(1);
        tree.setCellRenderer(new DemoRenderer());// 更改節點圖標
        tree.putClientProperty("JTree.lineStyle", "None");// 去掉父子節點之間的線條
        content.add(tree, BorderLayout.CENTER);
    }

    private Icon produceImage(String name) {
        ImageIcon backImage = new ImageIcon(getClass().getClassLoader().getResource(name));
        return backImage;
    }

    private void initListener() {
        tree.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                TreePath path = tree.getSelectionPath();
                if (null != path) {
                    Object object = path.getLastPathComponent();
                    DemoNode node = (DemoNode) object;
                    // 二級節點（分組）咱就無論了
                    if (node.getLevel() == 2) {
                        node.nodeContent.setBorder(inBorder);
                        node.nodeContent.setBackground(Color.ORANGE);
                        // 去掉選中以外其餘全部節點的特效
                        for (int i = 0; i < root.getChildCount(); i++) {
                            DemoNode cate = (DemoNode) root.getChildAt(i);
                            // 三級節點
                            for (int j = 0; j < cate.getChildCount(); j++) {
                                DemoNode buddy = (DemoNode) cate.getChildAt(j);
                                if (node != buddy) {
                                    buddy.nodeContent.setBorder(null);
                                    buddy.nodeContent.setBackground(null);
                                }
                                model.reload(buddy);
                            }
                        }
                        model.reload(node);
                    }
                }
            }
        });
        tree.addMouseMotionListener(new MouseMotionAdapter() {
            // 沒有使用moseEnter事件，是由於此方法裏面沒有能夠獲取當前節點的API
            // 你們如果知道有更好的方法，能夠告訴我一下，感激涕零
            // 還有，你們看到以下方法，循環太多，若是節點過多的話，效率就不行了，可是事件只能加到jtree上，若是能加到我重繪的UI上就行了。。。
            @Override
            public void mouseMoved(MouseEvent e) {
                TreePath path = tree.getPathForLocation(e.getX(), e.getY());
                if (null != path) {
                    Object object = path.getLastPathComponent();
                    DemoNode node = (DemoNode) object;

                    // 無論三七二十一，先把本身的特效加上再說
                    // 這裏由於是鼠標移動事件，觸發太快了，因此要判斷是否在當前節點上移動鼠標
                    if (node.getLevel() == 1 && node.cateContent.getBorder() != inBorder) {
                        node.cateContent.setBorder(inBorder);
                    }
                    if (node.getLevel() == 2 && node.nodeContent.getBorder() != inBorder) {
                        node.nodeContent.setBorder(inBorder);
                    }
                    model.reload(node);

                    // 去掉選中以外其餘全部節點的特效
                    for (int i = 0; i < root.getChildCount(); i++) {
                        DemoNode cate = (DemoNode) root.getChildAt(i);
                        if (node != cate && cate.cateContent.getBackground() != Color.ORANGE) {
                            cate.cateContent.setBorder(null);
                        }
                        model.reload(cate);
                        // 三級節點
                        for (int j = 0; j < cate.getChildCount(); j++) {
                            DemoNode buddy = (DemoNode) cate.getChildAt(j);
                            if (node != buddy && buddy.nodeContent.getBackground() != Color.ORANGE) {
                                buddy.nodeContent.setBorder(null);
                            }
                            model.reload(buddy);
                        }
                    }
                }
            }
        });
    }

    public static void main(String[] args) {
        run(new JTreeDemo(), 300, 600);
    }

}

class UserObject {
    private String path;
    private String name;
    private String access;

    public UserObject(String path, String name, String access) {
        super();
        this.path = path;
        this.name = name;
        this.access = access;
    }

    @Override
    public String toString() {
        return name;// GUI上樹顯示的節點信息
    }
}

 

package swing.tree;

import java.awt.Component;
import java.awt.Dimension;

import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.tree.DefaultMutableTreeNode;

/*2015-6-7*/
public class DemoNode extends DefaultMutableTreeNode{

    private static final long serialVersionUID = 1L;
    /** 圖片 */
    private Icon icon;
    /** 節點信息 */
    private Object userObject;
    /** 簽名 */
    private String sign;
    
    public JPanel cateContent;
    public JPanel nodeContent;
    
    public JLabel iconLabel;
    public JLabel nameLabel;
    
    public JLabel signLabel;
    
    /**
     * 初始化分組節點
     * @param name 名稱
     */
    public DemoNode(Icon icon, Object name) {
        this.icon = icon;
        this.userObject = name;
        // 初始化UI
        initCateGUI();
    }

    /**
     * 初始化好友節點
     * @param icon 頭像
     * @param nick 暱稱
     * @param sign 簽名
     */
    public DemoNode(Icon icon, Object nick, String sign) {
        this.icon = icon;
        this.userObject = nick;
        this.sign = sign;
        // 初始化UI
        initNodeGUI();
    }
    
    /**
     * 自定義分組UI
     */
    private void initCateGUI() {
        cateContent = new JPanel();
        cateContent.setLayout(null);
//        cateContent.setOpaque(false);
        // 這裏你們注意，當咱們寫好UI以後可能會發現他的顏色不太對，
        // 這時候千萬不要用上面那句，否則當咱們想再次改變其顏色的時候，就生效不了
        // 紅綠藍分別爲255的這個顏色趨近於透明，咱們能夠用它來代替setOpaque
//        cateContent.setBackground(new Color(255,255,255));
        // 忽然發現置成null也能夠
        cateContent.setBackground(null);
        cateContent.setPreferredSize(new Dimension(300, 25));
//        cateContent.setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY));
        
        iconLabel = new JLabel(icon);
        iconLabel.setBounds(6, 5, 20, 16);
        cateContent.add(iconLabel);
        
        nameLabel = new JLabel(userObject.toString());
        nameLabel.setBounds(23, 0, 132, 28);
        cateContent.add(nameLabel);
    }
    
    /**
     * 自定義好友UI
     */
    private void initNodeGUI() {
        nodeContent = new JPanel();
        nodeContent.setLayout(null);
//        nodeContent.setOpaque(false);
        nodeContent.setBackground(null);
        nodeContent.setPreferredSize(new Dimension(300, 50));
//        nodeContent.setBorder(BorderFactory.createLineBorder(Color.LIGHT_GRAY));
        
        iconLabel = new JLabel(icon);
        iconLabel.setBounds(8, 4, 39, 42);
        nodeContent.add(iconLabel);
        
        nameLabel = new JLabel(userObject.toString());
        nameLabel.setBounds(59, 5, 132, 19);
        nodeContent.add(nameLabel);
        
        signLabel = new JLabel(sign);
        signLabel.setBounds(59, 28, 132, 17);
        nodeContent.add(signLabel);
    }
    
    /**
     * 將自定義UI返回給渲染器    <br/>
     * 供渲染器調用，返回的必須是一個Component
     * @return
     */
    public Component getCateView() {
        return cateContent;
    }
    
    /**
     * 將自定義UI返回給渲染器    <br/>
     * 供渲染器調用，返回的必須是一個Component
     * @return
     */
    public Component getNodeView() {
        return nodeContent;
    }

}

 

package swing.tree;

import java.awt.Component;

import javax.swing.ImageIcon;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;

public class DemoRenderer extends DefaultTreeCellRenderer {
    private static final long serialVersionUID = 1L;

    @Override
    public Component getTreeCellRendererComponent(JTree tree, Object value,
            boolean sel, boolean expanded, boolean leaf, int row,
            boolean hasFocus) {
//        DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
//        // 根節點從0開始，依次往下
//        // 分組
//        if (node.getLevel() == 1) {
//            if (expanded) {
//                this.setIcon(new ImageIcon(getClass().getClassLoader().getResource("arrow_down.png")));
//            } else {
//                this.setIcon(new ImageIcon(getClass().getClassLoader().getResource("arrow_left.png")));
//            }
//        }
//        // 好友
//        if (node.getLevel() == 2) {
//            this.setIcon(new ImageIcon(getClass().getClassLoader().getResource("qq_icon.png")));
//        }
//        this.setText(value.toString());
//        return this;
        
        // 你們這裏注意，我爲了節省時間，因此就沒有寫兩個node類
        // 全部的代碼寫在了同一個類中，而後根據不一樣的節點來調用相應的方法
        DemoNode node = (DemoNode) value;
        if (node.getLevel() == 1) {
            if (expanded) {
                node.iconLabel.setIcon(new ImageIcon(getClass().getClassLoader().getResource("arrow_down.png")));
            } else {
                node.iconLabel.setIcon(new ImageIcon(getClass().getClassLoader().getResource("arrow_left.png")));
            }
            return node.getCateView();
        }
        if (node.getLevel() == 2) {
            node.iconLabel.setIcon(new ImageIcon(getClass().getClassLoader().getResource("qq_icon.png")));
            return node.getNodeView();
        }
        return this;
    }
    
}

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