java swing JTree 实现资源管理器 UIManager.setLookAndFeel 更改外观

java swing JTree 实现资源管理器 UIManager.setLookAndFeel 更改外观 2009-04-03 09:09

转自http://www.java-cn.com/bbs-jsp/show.jsp?forum=advanced&id=6589

import javax.swing.*;import javax.swing.event.*;import javax.swing.tree.*;import java.awt.*;import java.awt.event.*;import java.io.File;import java.util.EventObject;import java.util.*;

/*** 用JTree实现资源管理器* Description: File Explorer <BR>* Copyright: Copyright (c) 2001<BR>* Email to <a href=mailto:SunKingEMail@163.net>Sunking</a><BR>* * @author Sunking* @version 1.0*/public class explore extends JFrame implements TreeExpansionListener,   TreeSelectionListener, ActionListener {/*** */private static final long serialVersionUID = 1L;final JTree tree = new JTree(createTreeModel());final JPanel pSub = new JPanel(new GridLayout(100, 3));final JSplitPane split;final JPanel statusbar = new JPanel(new BorderLayout());final JLabel lbStatus = new JLabel(" ");

public explore() {   Dimension dimension = getToolkit().getScreenSize();   int i = (dimension.width - 640) / 2;   int j = (dimension.height - 480) / 2;   setBounds(i, j, 640, 480);   addWindowListener(new WindowAdapter() {    public void windowClosing(WindowEvent windowevent) {     System.exit(0);    }   });

   split = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, new JScrollPane(     tree), new JScrollPane(pSub));   split.setLastDividerLocation(200);   split.setDividerLocation(200);   getContentPane().add(split);   pSub.setBackground(Color.white);   tree.addTreeExpansionListener(this);   tree.addTreeSelectionListener(this);   try {    UIManager      .setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");    SwingUtilities.updateComponentTreeUI(this); //注意   } catch (Exception ex) {   }   getContentPane().add(statusbar, BorderLayout.SOUTH);   statusbar.add(lbStatus, BorderLayout.WEST);}

public void treeCollapsed(TreeExpansionEvent e) {}

public void treeExpanded(TreeExpansionEvent e) {   if (tree.getLastSelectedPathComponent() == null)    return;   if (tree.getLastSelectedPathComponent().toString().trim().equals(     "Local"))    return;   TreePath path = e.getPath();   FileNode node = (FileNode) path.getLastPathComponent();   if (!node.isExplored()) {    DefaultTreeModel model = (DefaultTreeModel) tree.getModel();    node.explore();    model.nodeStructureChanged(node);   }}

public void valueChanged(TreeSelectionEvent e) {   try {    String s = "";    if (tree.getLastSelectedPathComponent() == null)     return;    pSub.removeAll();    if (tree.getLastSelectedPathComponent().toString().trim().equals(      "Local")) {     File roots[] = File.listRoots();     for (int i = 1; i < roots.length; i++) {      String DiskName = roots[i].toString();      DiskName = DiskName.substring(0, DiskName.indexOf(":") + 1);      addButton(DiskName, "");     }    } else {     Object[] path = e.getPath().getPath();     String ss = "";     for (int i = 1; i < path.length; i++)      ss += File.separator + path[i].toString();     File f = new File(ss.substring(1));     lbStatus.setText(f.toString());     String[] list = f.list();     Vector vFile = new Vector(), vDir = new Vector();     for (int i = 0; i < list.length; i++) {      if ((new File(ss + File.separator + list[i])).isDirectory())       vDir.addElement(list[i]);      else       vFile.addElement(list[i]);     }     sortElements(vFile);     sortElements(vDir);     for (int i = 0; i < vDir.size(); i++)      addButton((String) (vDir.elementAt(i)), ss);     for (int i = 0; i < vFile.size(); i++)      addButton((String) (vFile.elementAt(i)), ss);    }    pSub.doLayout();    pSub.repaint();   } catch (Exception ee) {   }}

public void sortElements(Vector v) {   for (int i = 0; i < v.size(); i++) {    int k = i;    for (int j = i + 1; j < v.size(); j++)     if (((String) (v.elementAt(j))).toLowerCase().compareTo(       ((String) (v.elementAt(k))).toLowerCase()) < 0)      k = j;    if (k != i)     swap(k, i, v);   }}

private void swap(int loc1, int loc2, Vector v) {   Object tmp = v.elementAt(loc1);   v.setElementAt(v.elementAt(loc2), loc1);   v.setElementAt(tmp, loc2);}

private void addButton(String fileName, String filePath) {   JButton btt = new JButton(fileName);   btt.setBorder(null);   btt.setHorizontalAlignment(SwingConstants.LEFT);   btt.setBackground(Color.white);   if ((new File(filePath + File.separator + fileName)).isDirectory())    btt.setIcon(UIManager.getIcon("Tree.closedIcon"));   else    btt.setIcon(UIManager.getIcon("Tree.leafIcon"));   pSub.add(btt);   btt.addActionListener(this);}

public void actionPerformed(ActionEvent e) {   try {    TreePath p = tree.getLeadSelectionPath();    String text = ((JButton) (e.getSource())).getText();    Object[] path = p.getPath();    String ss = "";    for (int i = 1; i < path.length; i++)     ss += File.separator + path[i].toString();    ss = ss.substring(1);    File f = new File(ss + File.separator + text);    lbStatus.setText(f.toString());    if (f.isDirectory()) {     int index = tree.getRowForPath(p);     tree.expandRow(index);     while (!(tree.getLastSelectedPathComponent().toString().trim()       .equals(text)))      tree.setSelectionRow(index++);     tree.expandRow(index - 1);    } else {     String postfix = text.toUpperCase();     if (postfix.indexOf(".TXT") != -1       || postfix.indexOf(".JAVA") != -1       || postfix.indexOf(".HTM") != -1       || postfix.indexOf(".LOG") != -1)      Runtime.getRuntime().exec(        "NotePad.exe " + ss + File.separator + text);    }   } catch (Exception ee) {   }}

private DefaultMutableTreeNode createTreeModel() {   DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Local");   File[] rootPath = File.listRoots();   for (int i = 1; i < rootPath.length; i++) {    FileNode Node = new FileNode(rootPath[i]);    Node.explore();    rootNode.add(Node);   }   return rootNode;}

public static void main(String args[]) {   new explore().setVisible(true);}

class FileNode extends javax.swing.tree.DefaultMutableTreeNode {   private boolean explored = false;

   public FileNode(File file) {    setUserObject(file);   }

   public boolean getAllowsChildren() {    return isDirectory();   }

   public boolean isLeaf() {    return !isDirectory();   }

   public File getFile() {    return (File) getUserObject();   }

   public boolean isExplored() {    return explored;   }

   public boolean isDirectory() {    return getFile().isDirectory();   }

   public String toString() {    File file = (File) getUserObject();    String filename = file.toString();    int index = filename.lastIndexOf(File.separator);    return (index != -1 && index != filename.length() - 1) ? filename      .substring(index + 1) : filename;   }

   public void explore() {    if (!isDirectory())     return;    if (!isExplored()) {     File file = getFile();

//    Java的Swing库缺省使用Metal LAF，但所有版本的Swing都带有包含了Motif LAF的ui.jar。//    另外，Windows版本的Swing包含Windows LAF，OS X版本的则包含Mac LAF。

//    UIManager.setLookAndFeel("javax.swing.plaf.motif.MotifLookAndFeel");    //UIManager.setLookAndFeel("javax.swing.plaf.windows.WindowsLookAndFeel");    //UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");    //UIManager.setLookAndFeel("com.apple.mrj.swing.MacLookAndFeel");    //UIManager.getSystemLookAndFeelClassName() //所用平台的外观

try {    UIManager      .setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");    SwingUtilities.updateComponentTreeUI(this); //注意   } catch (Exception ex) {   }

UIManager.setLookAndFeel("javax.swing.plaf.motif.MotifLookAndFeel");

 

 

 

UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");