这是我的问题。我想写一个原始的 MultiRenameTool（重命名部分还不重要）。您可以浏览左侧的目录（JTree），当您选择一个目录时，您可以在右侧看到其内容（JTable - 只是文件）。
问题是，我不知道如何将选定的目录传递给 JTable 的列表。
我已经为 JTree 使用了 Kirill Grouchnikov 的代码，并稍微修改了它。
import java.awt.BorderLayout;
import java.awt.Component;
import java.io.File;
import java.io.FileFilter;
import java.util.*;
import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.filechooser.FileSystemView;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
/**
* @author Kirill Grouchnikov
*/
public class FileTreePanel extends JPanel {
protected static FileSystemView fsv = FileSystemView.getFileSystemView();
private JTree tree;
//At first I was trying this - but it is wrong.
public static File current;
private static class FileTreeCellRenderer extends DefaultTreeCellRenderer {
private Map<String, Icon> iconCache = new HashMap<String, Icon>();
private Map<File, String> rootNameCache = new HashMap<File, String>();
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) {
FileTreeNode ftn = (FileTreeNode) value;
File file = ftn.file;
String filename = "";
if (file != null) {
if (ftn.isFileSystemRoot) {
filename = this.rootNameCache.get(file);
if (filename == null) {
filename = fsv.getSystemDisplayName(file);
this.rootNameCache.put(file, filename);
}
} else {
filename = file.getName();
}
}
JLabel result = (JLabel) super.getTreeCellRendererComponent(tree, filename, sel, expanded, leaf, row, hasFocus);
if (file != null) {
Icon icon = this.iconCache.get(filename);
if (icon == null) {
icon = fsv.getSystemIcon(file);
this.iconCache.put(filename, icon);
}
result.setIcon(icon);
}
return result;
}
}
private static class FileTreeNode implements TreeNode {
private File file;
private File[] children;
private TreeNode parent;
private boolean isFileSystemRoot;
public FileTreeNode(File file, boolean isFileSystemRoot, TreeNode parent) {
this.file = file;
this.isFileSystemRoot = isFileSystemRoot;
this.parent = parent;
this.children = this.file.listFiles(new FileFilter() {
//!Modification here - display only the directories
@Override
public boolean accept(File file) {
return file.isDirectory();
}
});
if (this.children == null) {
this.children = new File[0];
}
//obliviously wrong "solution" :(
current = file;
}
public FileTreeNode(File[] children) {
this.file = null;
this.parent = null;
this.children = children;
}
@Override
public Enumeration<?> children() {
final int elementCount = this.children.length;
return new Enumeration<File>() {
int count = 0;
@Override
public boolean hasMoreElements() {
return this.count < elementCount;
}
@Override
public File nextElement() {
if (this.count < elementCount) {
return FileTreeNode.this.children[this.count++];
}
throw new NoSuchElementException("Nincs több elem.");
}
};
}
@Override
public boolean getAllowsChildren() {
return true;
}
@Override
public TreeNode getChildAt(int childIndex) {
return new FileTreeNode(this.children[childIndex],
this.parent == null, this);
}
@Override
public int getChildCount() {
return this.children.length;
}
@Override
public int getIndex(TreeNode node) {
FileTreeNode ftn = (FileTreeNode) node;
for (int i = 0; i < this.children.length; i++) {
if (ftn.file.equals(this.children[i])) {
return i;
}
}
return -1;
}
@Override
public TreeNode getParent() {
return this.parent;
}
@Override
public boolean isLeaf() {
return (this.getChildCount() == 0);
}
}
public FileTreePanel() {
super();
this.setLayout(new BorderLayout());
File[] roots = File.listRoots();
FileTreeNode rootTreeNode = new FileTreeNode(roots);
this.tree = new JTree(rootTreeNode);
this.tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
this.tree.setCellRenderer(new FileTreeCellRenderer());
this.tree.setRootVisible(true);
this.tree.addTreeSelectionListener(new JTreeSelectionListener());
JScrollPane jsp = new JScrollPane(this.tree);
this.add(jsp, BorderLayout.CENTER);
}
private class JTreeSelectionListener implements TreeSelectionListener {
@Override
public void valueChanged(TreeSelectionEvent jtsl) {
TreePath o = jtsl.getPath();
System.out.println(o);
System.out.println(current);
SelectionList.listBuilder(current);
}
}
}
最重要的部分在最后，在 TreeSelectionEvent。在这里，我应该能够从实际选择的目录中转换/制作/投射文件。
import java.awt.BorderLayout;
import java.awt.Color;
import java.io.File;
import java.io.FileFilter;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class SelectionList extends JPanel {
private static FilesData data;
private static JTable table;
public SelectionList() {
super();
data = new FilesData();
table = new JTable(data);
table.setFillsViewportHeight(true);
table.setShowGrid(true);
table.setGridColor(Color.BLACK);
JScrollPane jsp = new JScrollPane(table);
this.add(jsp, BorderLayout.CENTER);
}
public static void listBuilder(final File f) {
data.files.clear();
File[] fs = f.listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
return file.isFile();
}
});
if (fs != null) {
for (File m : fs) {
Files ujFile = new Files(m, m.isHidden(), Menu.checkAll.getState());
if (!m.isHidden() || Menu.hiddenFilesVisibility.getState()) {
data.files.add(ujFile);
}
}
}
table.repaint();
}
}
这很有趣，因为 listBuilder 函数。我认为这是足够的信息，但如果你也需要我的其他课程，我会上传它。我很感激任何帮助！提前谢谢大家。任何人？:(