Java：强制JFileChooser到一个目录及其子文件夹

Question

我已经创建了一个JFileChooser，我想只在user.home目录和它的子文件夹中限制它。

//JButton select = new JButton();
final File directorylock = new File(System.getProperty("user.home"));
JFileChooser browse = new JFileChooser(directorylock);
browse.setFileView(new FileView() {
    @Override
    public Boolean isTraversable(File f) {
         return directorylock.equals(f);
    }
});

Answer 1

请参考这个样品，它像你想要的一样好，

import java.awt.*;
import java.awt.event.*;
import java.io.File;
import javax.swing.*;
import javax.swing.filechooser.FileView;

public class JFileChooserExample {

       private JFrame mainFrame;
       private JLabel headerLabel;
       private JLabel statusLabel;
       private JPanel controlPanel;

       public JFileChooserExample(){
          prepareGUI();
       }

       public static void main(String[] args){
           JFileChooserExample  swingControlDemo = new JFileChooserExample();      
          swingControlDemo.showFileChooserDemo();
       }

       private void prepareGUI(){
          mainFrame = new JFrame("Java Swing Examples");
          mainFrame.setSize(400,400);
          mainFrame.setLayout(new GridLayout(3, 1));
          mainFrame.addWindowListener(new WindowAdapter() {
             public void windowClosing(WindowEvent windowEvent){
                System.exit(0);
             }        
          });    
          headerLabel = new JLabel("", JLabel.CENTER);        
          statusLabel = new JLabel("",JLabel.CENTER);    

          statusLabel.setSize(350,100);

          controlPanel = new JPanel();
          controlPanel.setLayout(new FlowLayout());

          mainFrame.add(headerLabel);
          mainFrame.add(controlPanel);
          mainFrame.add(statusLabel);
          mainFrame.setVisible(true);  
       }

       private void showFileChooserDemo(){
          headerLabel.setText("Control in action: JFileChooser"); 

          final File directorylock = new File(System.getProperty("user.home"));
          final JFileChooser  fileDialog = new JFileChooser(directorylock);

          fileDialog.setFileView(new FileView() {
                @Override
                public Boolean isTraversable(File f) {
                     return directorylock.equals(f);
                }
            });

          JButton showFileDialogButton = new JButton("Open File");
          showFileDialogButton.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                int returnVal = fileDialog.showOpenDialog(mainFrame);
                if (returnVal == JFileChooser.APPROVE_OPTION) {
                   java.io.File file = fileDialog.getSelectedFile();
                   statusLabel.setText("File Selected :" 
                   + file.getName());
                }
                else{
                   statusLabel.setText("Open command cancelled by user." );           
                }      
             }
          });
          controlPanel.add(showFileDialogButton);
          mainFrame.setVisible(true);  
       }
    }

输出：