JFileChooser

http://www.cnblogs.com/dyllove98/archive/2012/03/05/2461895.html
package swing.choose;

import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileNameExtensionFilter;

public class JFileChooseDemo extends JFrame {
    private static final long serialVersionUID = 1L;

    private JFileChooser fileChooser = new JFileChooser();;

    public JFileChooseDemo() {

        JButton button = new JButton("Click");
        button.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                int result = fileChooser.showOpenDialog(JFileChooseDemo.this);
                if (result == JFileChooser.CANCEL_OPTION) {
                    return;
                }

                File chooseFile = fileChooser.getSelectedFile();
                add(new JLabel("<html><font color=blue>" + chooseFile.getAbsolutePath()));
                validate();
            }
        });
        this.add(button);
        this.setLayout(new FlowLayout());
        this.setSize(400, 200);

        this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        this.setLocationRelativeTo(null);
        this.setVisible(true);
    }

    public static void main(String[] args) {
        JFileChooseDemo demo = new JFileChooseDemo();
        demo.fileChooser.setSelectedFile(new File("test.xls"));

        // 设置文件过滤器
//        demo.fileChooser.setFileFilter(new FileNameExtensionFilter("Description", "gif", "jpg", "bmp"));
        demo.fileChooser.setFileFilter(new FileFilter() {

            @Override
            public String getDescription() {
                return "MS-Excel 2003 文件(.xls)|快捷方式(.lnk)";
            }

            @Override
            public boolean accept(File f) {
                if (f.isDirectory()) {
                    return true;
                }
                return f.getName().toLowerCase().endsWith("") || f.getName().toLowerCase().endsWith(".lnk");
            }
        });

    }
}