Java GlassPane进度条遮罩

package com.swing.demo;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Toolkit;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class LoadingGlassPane extends JPanel {
    private static final String ICON_PATH = System.getProperty("user.dir")
            + "\\icos\\loading.gif";
    private static final long serialVersionUID = 1L;

    public LoadingGlassPane() {
        setLayout(new BorderLayout());
        setOpaque(false);
        add(new JLabel(new ImageIcon(ICON_PATH)));
        addMouseListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                super.mousePressed(e);
            }
        });
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("GlassPane");
        LoadingGlassPane glassPane = new LoadingGlassPane();
        frame.setGlassPane(glassPane);
        JButton button = new JButton("查询");
        button.addMouseListener(new GlassMouseAdapter());
        frame.getContentPane().setLayout(new FlowLayout());
        frame.getContentPane().add(button);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // 窗体居中
        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
        frame.setSize(400, 320);
        frame.setLocation((d.width - frame.getSize().width) / 2,
                (d.height - frame.getSize().height) / 2);
        frame.setVisible(true);
    }
}

package com.swing.demo;

import java.awt.Component;
import java.awt.Container;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;

public class GlassMouseAdapter extends MouseAdapter {
    @Override
    public void mouseClicked(MouseEvent e) {
        JButton button = (JButton) e.getSource();
        Container container = (Container) button.getTopLevelAncestor();
        System.out.println(container.getClass().getName());
        Component glassPane = null;
        if (container instanceof JFrame) {
            glassPane = ((JFrame) container).getGlassPane();
        } else if (container instanceof JDialog) {
            glassPane = ((JDialog) container).getGlassPane();
        }

        doClick(button, glassPane);
    }

    private void doClick(JButton button, Component glassPane) {
        if (null == glassPane) {
            return;
        }
        new Thread() {
            public void run() {
                button.setEnabled(false);
                glassPane.setVisible(true);
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                glassPane.setVisible(false);
                button.setEnabled(true);
            }
        }.start();
    }
}