请gtlang78()进来接粉：）吼吼 (三)

gtlang78()在不？再给你看一个有挑战性的问题哇哈哈
http://community.csdn.net/Expert/topic/4193/4193834.xml?temp=.3597376
JDK1.3 郁闷得不行的JDK 竟然连根目录都选不了：（

gtlang78()是个好同志！
我超级崇拜他！

我自己写了一个目录选择对话框，你看看能不能用吧，针对jdk1.3作了修改，所以用1.4或者1.5看会有一些问题package dirchooser;
import java.io.File;
import java.util.*;import javax.swing.filechooser.FileSystemView;
import javax.swing.tree.TreeNode;public class DirTreeNode implements TreeNode {
private File dir = null; private List children = null; private DirTreeNode parent;

public DirTreeNode(File dir, DirTreeNode parent) {
this.dir = dir;
this.parent = parent;
} public TreeNode getChildAt(int childIndex) {
initChildrenList(); return (TreeNode) children.get(childIndex);
} public int getChildCount() {
initChildrenList();

return children.size();
} public TreeNode getParent() {
return parent;
} public int getIndex(TreeNode node) {
initChildrenList(); return children.indexOf(node);
} public boolean getAllowsChildren() {
return true;
} public boolean isLeaf() {
// if (dir != null && FileSystemView.getFileSystemView().isFloppyDrive(dir)) {
// return false;
// }
if (dir != null && dir.getParent() == null &&
(dir.getPath().toUpperCase().startsWith("A:") ||
dir.getPath().toUpperCase().startsWith("B:"))) {
return false;
} initChildrenList(); return children.isEmpty();
} public Enumeration children() {
initChildrenList(); final Iterator iter = children.iterator();
return new Enumeration() {
public boolean hasMoreElements() {
return iter.hasNext();
} public Object nextElement() {
return iter.next();
}
};
} private void initChildrenList() {
if (children == null) {
File[] subDirs = null;
if (dir == null) {
subDirs = FileSystemView.getFileSystemView().getRoots();
}
else {
subDirs = FileSystemView.getFileSystemView().getFiles(dir, false);
}
if (subDirs == null || subDirs.length == 0) {
children = Collections.EMPTY_LIST;
}
else {
children = new ArrayList();
for (int i = 0; i < subDirs.length; i++) {
if (subDirs[i]!= null && subDirs[i].isDirectory()) {
children.add(new DirTreeNode(subDirs[i], this));
}
}
}
}
} public String toString() {
// return dir == null ?
// "" : FileSystemView.getFileSystemView().getSystemDisplayName(dir);
if (dir == null) {
return "我的电脑";
}
else if (dir.getParent() == null) {
return dir.getPath();
}
else {
return dir.getName();
}
} public boolean equals(Object obj) {
if (obj instanceof DirTreeNode) {
DirTreeNode t = (DirTreeNode) obj;
return dir == null ? t.dir == null : dir.equals(t.dir);
}
return false;
} public int hashCode() {
return dir == null ? 0 : dir.hashCode();
} public File getDir()
{
return dir;
}
}

package dirchooser;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreePath;public class DirChooserDialog
extends JDialog
{
private JLabel descrLabel = new JLabel("", JLabel.LEFT);
private JTree dirTree = null;
private JScrollPane scrollPane = null;

private JButton okBtn = new JButton("确定");
private JButton cancleBtn = new JButton("取消");

private JPanel btnPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
private boolean okBtnPressed;

public DirChooserDialog(Frame owner, String dialogTitle, String descrStr) {
super(owner, dialogTitle, true); initComponents(descrStr);
} public DirChooserDialog(Dialog owner, String dialogTitle, String descrStr) {
super(owner, dialogTitle, true);

initComponents(descrStr);
} private void initComponents(String descrStr)
{
descrLabel.setText(descrStr); btnPanel.add(okBtn);
btnPanel.add(cancleBtn);

dirTree = new JTree(new DirTreeNode(null, null));
dirTree.setCellRenderer(new DefaultTreeCellRenderer() {
public Component getTreeCellRendererComponent(
JTree tree, Object value, boolean sel, boolean expanded,
boolean leaf, int row, boolean hasFocus) { super.getTreeCellRendererComponent(
tree, value, sel, expanded, leaf, row, hasFocus);

DirTreeNode node = (DirTreeNode) value;
if (node.getDir() != null) {
// setIcon(FileSystemView.getFileSystemView().getSystemIcon(node.dir));
if (node.getDir().getParent() == null) {
setIcon(UIManager.getIcon("FileView.hardDriveIcon"));
}
else {
setIcon(UIManager.getIcon("FileView.directoryIcon"));
}
}
else {
setIcon(UIManager.getIcon("FileView.computerIcon"));
}
return this;
}
});
dirTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent e)
{
updateOKBtnState();
}
});
// dirTree.setRootVisible(false);
JScrollPane scrollPane = new JScrollPane(dirTree);
scrollPane.setPreferredSize(new Dimension(300, 300));

okBtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
okBtnPressed = true;
dispose();
}
});

cancleBtn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
okBtnPressed = false;
dispose();
}
});

((JComponent) getContentPane()).setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
getContentPane().setLayout(new BorderLayout(5, 5)); getContentPane().add(descrLabel, BorderLayout.NORTH);
getContentPane().add(scrollPane, BorderLayout.CENTER);
getContentPane().add(btnPanel, BorderLayout.SOUTH);

setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);

updateOKBtnState();
pack();
} private void updateOKBtnState()
{
okBtn.setEnabled(getSelectedDir() != null);
} public File showDirChooserDialog() {
okBtnPressed = false;

Rectangle bounds = getParent().getBounds();
setLocation(bounds.x + (bounds.width - getWidth()) / 2 ,
bounds.y + (bounds.height - getHeight()) / 2);
setVisible(true); if (okBtnPressed) {
return getSelectedDir();
}
else {
return null;
}
}

public File getSelectedDir() {
TreePath path = dirTree.getSelectionPath();
if (path == null || path.getPathCount() == 1) {
return null;
}
DirTreeNode node = (DirTreeNode) path.getLastPathComponent(); return node.getDir();
}

public void setSelectedDir(File dir) {
List pathList = new LinkedList();
do {
pathList.add(0, dir);
dir = dir.getParentFile();
} while (dir != null);

TreePath path = new TreePath(dirTree.getModel().getRoot());
for (Iterator iter = pathList.iterator(); iter.hasNext();) {
File d = (File) iter.next();
path = path.pathByAddingChild(
new DirTreeNode(d, (DirTreeNode) path.getLastPathComponent()));
}

dirTree.setSelectionPath(path);
dirTree.scrollPathToVisible(path);
}

public static void main(String[] args)
{
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
} final JFrame f = new JFrame("DirChooserTest"); JButton btn = new JButton("ChooseDir");
btn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
DirChooserDialog dlg = new DirChooserDialog(f, "DirChooserDialog", "选择保存文件的目录:");
//dlg.setSelectedDir(new File("F:/temp"));
System.out.println(dlg.showDirChooserDialog());
}
}); f.getContentPane().add(btn, BorderLayout.CENTER);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.pack();
f.setLocation(500, 500);
f.show();
}
}

天啊 gtlang78()老大我对您的景仰真是有如滔滔江水连绵不绝又有如洪水泛滥一发不可收拾啦
真是谢谢你了
下午我解决了个比较郁闷的问题单（哈哈小有点成就感）所以一直没空上网看
结果上来一看真的是感动啊感动感动。感动感动。感动感动。感动感动。感动感动。

高手啊高手哎不知道偶猴年马月能够练到这般身手
要加油加油了 GOOD GOOD STUDY ,DAY DAY UP ~

调试易

请gtlang78()进来接粉：）吼吼 (三)

解决方案 »

请gtlang78()进来接粉：） 吼吼 (三)

解决方案 »

请gtlang78()进来接粉：）吼吼 (三)