下面列出了java.awt.FileDialog#setFilenameFilter ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* If invoked from within a Frame: this pulls up a FileDialog to browse for
* a file. If this is invoked from a secure applet: then this will throw an
* exception.
*
* @param ext
* an optional list of extensions
* @return a File, or null if the user declined to select anything.
*/
public File browseForFile(String... ext) {
Window w = SwingUtilities.getWindowAncestor(this);
if (!(w instanceof Frame))
throw new IllegalStateException();
Frame frame = (Frame) w;
FileDialog fd = new FileDialog(frame);
if (ext != null && ext.length > 0
&& (!(ext.length == 1 && ext[0] == null)))
fd.setFilenameFilter(new SuffixFilenameFilter(ext));
fd.pack();
fd.setLocationRelativeTo(null);
fd.setVisible(true);
String d = fd.getFile();
if (d == null)
return null;
return new File(fd.getDirectory() + fd.getFile());
}
/**
* Displays a standard AWT file dialog for choosing a file for loading or
* saving.
*
* @param frame
* parent frame
* @param title
* dialog title
* @param path
* base directory (or null)
* @param filter
* a FilenameFilter implementation (or null)
* @param mode
* either FileUtils.LOAD or FileUtils.SAVE
* @return path to chosen file or null, if user has canceled
*/
public static String showFileDialog(final Frame frame, final String title,
String path, FilenameFilter filter, final int mode) {
String fileID = null;
FileDialog fd = new FileDialog(frame, title, mode);
if (path != null) {
fd.setDirectory(path);
}
if (filter != null) {
fd.setFilenameFilter(filter);
}
fd.setVisible(true);
if (fd.getFile() != null) {
fileID = fd.getFile();
fileID = fd.getDirectory() + fileID;
}
return fileID;
}
/**
* Displays a file chooser dialog for the user to select the file to which the current game should
* be saved.
*
* @param frame The owner of the file chooser dialog; may be {@code null}.
* @return The file to which the current game should be saved or {@code null} if the user
* cancelled the operation.
*/
public static File getSaveGameLocation(final Frame frame, final GameData gameData) {
final FileDialog fileDialog = new FileDialog(frame);
fileDialog.setMode(FileDialog.SAVE);
fileDialog.setDirectory(ClientSetting.saveGamesFolderPath.getValueOrThrow().toString());
fileDialog.setFilenameFilter((dir, name) -> GameDataFileUtils.isCandidateFileName(name));
fileDialog.setFile(getSaveGameName(gameData));
fileDialog.setVisible(true);
final String fileName = fileDialog.getFile();
if (fileName == null) {
return null;
}
// If the user selects a filename that already exists,
// the AWT Dialog will ask the user for confirmation
return new File(fileDialog.getDirectory(), GameDataFileUtils.addExtensionIfAbsent(fileName));
}
public void open() {
final FileDialog openDialog = new FileDialog(this);
openDialog.setDirectory(Preferences.getInstance().getOpenPath());
openDialog.setMode(FileDialog.LOAD);
openDialog.setFilenameFilter(new FilenameFilter() {
public boolean accept(File dir, String name) {
String[] supportedFiles = { "PGM", "pgm" };
for (int i = 0; i < supportedFiles.length; i++) {
if (name.endsWith(supportedFiles[i])) {
return true;
}
}
return false;
}
});
openDialog.setVisible(true);
Preferences.getInstance().setOpenPath(openDialog.getDirectory());
if (openDialog.getDirectory() != null && openDialog.getFile() != null) {
String filePath = openDialog.getDirectory() + openDialog.getFile();
System.out.println(filePath);
final File pgmFile = new File(filePath);
final MainFrame newFrame = new MainFrame(pgmFile);
newFrame.show();
}
}
/**
*
*
* @param title
* @param mode
* @param filter
*
* @return
*/
private static File chooseFileAWT(String title, Mode mode, FileFilter filter) {
Easik e = Easik.getInstance();
EasikSettings s = e.getSettings();
FileDialog dialog = new FileDialog(e.getFrame(), title,
(mode == Mode.SAVE) ? FileDialog.SAVE : FileDialog.LOAD);
dialog.setDirectory(s.getDefaultFolder());
if ((mode == Mode.DIRECTORY) && EasikConstants.RUNNING_ON_MAC) {
System.setProperty("apple.awt.fileDialogForDirectories", "true");
} else if (filter != null) {
dialog.setFilenameFilter(filter);
}
// Show the dialog (this blocks until the user is done)
dialog.setVisible(true);
if ((mode == Mode.DIRECTORY) && EasikConstants.RUNNING_ON_MAC) {
System.setProperty("apple.awt.fileDialogForDirectories", "false");
}
String filename = dialog.getFile();
if (filename == null) {
return null;
}
File selected = new File(dialog.getDirectory(), filename);
if (mode != Mode.DIRECTORY) {
s.setProperty("folder_last", selected.getParentFile().getAbsolutePath());
}
return selected;
}
/**
* Returns files the user selected or an empty array if the user cancelled
* the dialog.
*/
public static File[] showOpenDialog(Frame f, String title,
boolean allowMultipleSelection, FilenameFilter filter) {
FileDialog fd = new FileDialog(f, title);
fd.setMode(FileDialog.LOAD);
if (filter != null)
fd.setFilenameFilter(filter);
fd.pack();
fd.setMultipleMode(allowMultipleSelection);
fd.setLocationRelativeTo(null);
fd.setVisible(true);
if (fd.getFile() == null)
return new File[] {};
return fd.getFiles();
}
/**
* Show a save FileDialog.
*
* @param f
* the frame that owns the FileDialog.
* @param title
* the dialog title
* @param filename
* the optional default filename shown in the file dialog.
* @param extension
* the file extension ("xml", "png", etc.)
* @return a File the user chose.
*/
public static File showSaveDialog(Frame f, String title, String filename,
String extension) {
if (extension.startsWith("."))
extension = extension.substring(1);
FileDialog fd = new FileDialog(f, title);
fd.setMode(FileDialog.SAVE);
if (filename != null)
fd.setFile(filename);
fd.setFilenameFilter(new SuffixFilenameFilter(extension));
fd.pack();
fd.setLocationRelativeTo(null);
fd.setVisible(true);
String s = fd.getFile();
if (s == null)
return null;
if (s.toLowerCase().endsWith("." + extension)) {
return new File(fd.getDirectory() + s);
}
// TODO: show a 'are you sure you want to replace' dialog here, if we
// change the filename
// native FileDialogs don't always show the right warning dialog IF the
// file extension
// isn't present
return new File(fd.getDirectory() + fd.getFile() + "." + extension);
}
/**
* Show a browse dialog, using the current file extensions if they are
* defined.
* <p>
* In a JNLP session this uses a FileOpenService, but otherwise this uses an
* AWT file dialog.
*
* @param component
* a component that relates to the Frame the possible dialog may
* be anchored to. This can be any component that is showing.
* @param extensions
* a list of possible extensions (or null if all files are
* accepted).
* @return the FileData the user selected, or null if the user cancelled
* this operation.
*/
public static FileData doBrowse(Component component, String[] extensions) {
/*
* if(JVM.isJNLP()) { try { FileOpenService fos =
* (FileOpenService)ServiceManager.lookup("javax.jnlp.FileOpenService");
* final FileContents contents = fos.openFileDialog(null, extensions);
* if(contents==null) return null; return new
* FileContentsWrapper(contents); } catch(Exception e) {
* e.printStackTrace(); } }
*/
Window w = SwingUtilities.getWindowAncestor(component);
if (w instanceof Frame) {
Frame f = (Frame) w;
FileDialog fd = new FileDialog(f);
String[] ext = extensions;
if (ext != null && ext.length > 0) {
fd.setFilenameFilter(new SuffixFilenameFilter(ext));
}
fd.pack();
fd.setLocationRelativeTo(null);
fd.setVisible(true);
if (fd.getFile() == null)
return null;
File file = new File(fd.getDirectory() + fd.getFile());
return new FileWrapper(file);
} else {
throw new RuntimeException("window ancestor: " + w);
}
}
private File getLoadFile(String filename, String extension) {
FileDialog fd = new FileDialog((JDialog) getRootPane().getTopLevelAncestor(),
Localizer.localize("LoadScannerOptionsFromFileTitle"), FileDialog.LOAD);
fd.setDirectory(".");
FilenameExtensionFilter filter = new FilenameExtensionFilter();
filter.addExtension("xml");
fd.setFilenameFilter(filter);
fd.setModal(true);
fd.setVisible(true);
if (fd.getFile() == null) {
return null;
}
return new File(fd.getDirectory() + File.separator + fd.getFile());
}
private File getSaveFile(String filename, String extension) {
FileDialog fd = new FileDialog((JDialog) getRootPane().getTopLevelAncestor(),
Localizer.localize("SaveScannerOptionsToFileTitle"), FileDialog.SAVE);
fd.setDirectory(".");
FilenameExtensionFilter filter = new FilenameExtensionFilter();
filter.addExtension("xml");
fd.setFilenameFilter(filter);
fd.setFile(filename + "." + extension);
fd.setModal(true);
fd.setVisible(true);
if (fd.getFile() == null) {
return null;
}
return new File(fd.getDirectory() + File.separator + fd.getFile());
}
private File getSaveFile(String filename, String extension) {
FileDialog fd = new FileDialog((Frame) getRootPane().getTopLevelAncestor(),
Localizer.localize("SaveImagesToFileTittle"), FileDialog.SAVE);
fd.setDirectory(".");
FilenameExtensionFilter filter = new FilenameExtensionFilter();
filter.addExtension(extension);
fd.setFilenameFilter(filter);
fd.setFile(filename + "." + extension);
fd.setModal(true);
fd.setVisible(true);
return new File(fd.getDirectory() + File.separator + fd.getFile());
}
private static int showNativeFileDialog(final JFileChooser chooser) {
final FileDialog result = new FileDialog((Frame) chooser.getParent());
result.setDirectory(chooser.getCurrentDirectory().getPath());
final File selected = chooser.getSelectedFile();
result.setFile(selected == null ? "" : selected.getPath());
result.setFilenameFilter(new FilenameFilter() {
@Override
public boolean accept(final File dir, final String name) {
return chooser.getFileFilter().accept(new File(dir.getPath() + File.pathSeparator + name));
}
});
if (chooser.getDialogType() == SAVE_DIALOG) {
result.setMode(FileDialog.SAVE);
} else {
// The native dialog only support Open and Save
result.setMode(FileDialog.LOAD);
}
if (chooser.getFileSelectionMode() == DIRECTORIES_ONLY) {
System.setProperty("apple.awt.fileDialogForDirectories", "true");
}
// Display dialog
result.setVisible(true);
System.setProperty("apple.awt.fileDialogForDirectories", "false");
if (result.getFile() == null) {
return CANCEL_OPTION;
}
final String selectedDir = result.getDirectory();
chooser
.setSelectedFile(new File(FileUtils.ensureTrailingSlash(selectedDir) + result.getFile()));
return APPROVE_OPTION;
}
/**
* Displays a standard AWT file dialog for choosing a file for loading or
* saving.
*
* @param frame
* parent frame
* @param title
* dialog title
* @param path
* base directory (or null)
* @param formats
* an array of allowed file extensions (or null to allow all)
* @param mode
* either FileUtils.LOAD or FileUtils.SAVE
* @return path to chosen file or null, if user has canceled
*/
public static String showFileDialog(final Frame frame, final String title,
String path, final String[] formats, final int mode) {
String fileID = null;
FileDialog fd = new FileDialog(frame, title, mode);
if (path != null) {
fd.setDirectory(path);
}
if (formats != null) {
fd.setFilenameFilter(new FilenameFilter() {
public boolean accept(File dir, String name) {
boolean isAccepted = false;
for (String ext : formats) {
if (name.indexOf(ext) != -1) {
isAccepted = true;
break;
}
}
return isAccepted;
}
});
}
fd.setVisible(true);
if (fd.getFile() != null) {
fileID = fd.getFile();
fileID = fd.getDirectory() + fileID;
}
return fileID;
}
/**
* Opens up a UI pop-up allowing user to select a game file. Returns nothing if user closes the
* pop-up.
*/
public Optional<File> selectGameFile(final Frame owner) {
final FileDialog fileDialog = new FileDialog(owner);
fileDialog.setMode(FileDialog.LOAD);
fileDialog.setDirectory(ClientSetting.saveGamesFolderPath.getValueOrThrow().toString());
fileDialog.setFilenameFilter((dir, name) -> GameDataFileUtils.isCandidateFileName(name));
fileDialog.setVisible(true);
// FileDialog.getFiles() always returns an array
// of 1 or 0 items, because FileDialog.multipleMode is false by default
return Arrays.stream(fileDialog.getFiles()).findAny().map(this::mapFileResult);
}
public void saveAs() {
final FileDialog saveDialog = new FileDialog(this);
saveDialog.setDirectory(Preferences.getInstance().getSavePath());
saveDialog.setMode(FileDialog.SAVE);
saveDialog.setFilenameFilter(new FilenameFilter() {
public boolean accept(File dir, String name) {
String[] supportedFiles = { "PGM", "pgm" };
for (int i = 0; i < supportedFiles.length; i++) {
if (name.endsWith(supportedFiles[i])) {
return true;
}
}
return false;
}
});
saveDialog.setVisible(true);
Preferences.getInstance().setSavePath(saveDialog.getDirectory());
String filename = saveDialog.getFile();
if (saveDialog.getDirectory() != null && filename != null) {
if (!filename.toUpperCase().endsWith(".PGM")) {
filename += ".PGM";
}
String filePath = saveDialog.getDirectory() + filename;
System.out.println(filePath);
final File file = new File(filePath);
setPgmFile(file);
program.save(pgmFile);
}
}
private File chooseFile() {
JFrame mainFrame = (JFrame) WindowManager.getDefault().getMainWindow();
FileDialog fileDialog = new FileDialog(mainFrame, new File(System.getProperty("user.home")).toString());
fileDialog.setTitle("Export changes in cvs file");
fileDialog.setFile("expected.csv");
fileDialog.setMode(FileDialog.SAVE);
fileDialog.setFilenameFilter(new ExtFileFilter("csv"));
fileDialog.setVisible(true);
String filename = fileDialog.getFile();
if (filename == null){
return null;
}
String dir = fileDialog.getDirectory();
return new File(dir + File.separator + filename);
}