How do I restrict JFileChooser to a directory?

问题:

I want to limit my users to a directory and its sub directories but the "Parent Directory" button allows them to browse to an arbitrary directory.

How should I go about doing that?

回答1:

You can probably do this by setting your own FileSystemView.

回答2:

Incase anyone else needs this in the future:

class DirectoryRestrictedFileSystemView extends FileSystemView
{
    private final File[] rootDirectories;

    DirectoryRestrictedFileSystemView(File rootDirectory)
    {
        this.rootDirectories = new File[] {rootDirectory};
    }

    DirectoryRestrictedFileSystemView(File[] rootDirectories)
    {
        this.rootDirectories = rootDirectories;
    }

    @Override
    public File createNewFolder(File containingDir) throws IOException
    {       
        throw new UnsupportedOperationException("Unable to create directory");
    }

    @Override
    public File[] getRoots()
    {
        return rootDirectories;
    }

    @Override
    public boolean isRoot(File file)
    {
        for (File root : rootDirectories) {
            if (root.equals(file)) {
                return true;
            }
        }
        return false;
    }
}

You'll obviously need to make a better "createNewFolder" method, but this does restrict the user to one of more directories.

And use it like this:

FileSystemView fsv = new DirectoryRestrictedFileSystemView(new File("X:\\"));
JFileChooser fileChooser = new JFileChooser(fsv);

or like this:

FileSystemView fsv = new DirectoryRestrictedFileSystemView( new File[] {
    new File("X:\\"),
    new File("Y:\\")
});
JFileChooser fileChooser = new JFileChooser(fsv);

回答3:

The solution of Allain is almost complete. Three problems are open to solve:

1. Clicking the "Home"-Button kicks the user out of restrictions
2. DirectoryRestrictedFileSystemView is not accessible outside the package
3. Starting point is not Root

---

1. Append @Override to DirectoryRestrictedFileSystemView

public TFile getHomeDirectory() { return rootDirectories[0]; }

1. set class and constructor public

2. Change JFileChooser fileChooser = new JFileChooser(fsv); into JFileChooser fileChooser = new JFileChooser(fsv.getHomeDirectory(),fsv);

I use it for restricting users to stay in a zip-file via TrueZips TFileChooser and with slight modifications to the above code, this works perfectly. Thanks a lot.

回答4:

No need to be that complicated. You can easily set selection mode of a JFileChooser like this

JFileChooser fc = new JFileChooser();
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
fc.setMultiSelectionEnabled(false);

You can read more reference here How to Use File Choosers