import java.awt.Container;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
* 设置背景图片类
*/
public class BackgroundImage {
public BackgroundImage(JFrame frame,Container container,String ImageName) {
// 限定加载图片路径,相对路径
ImageIcon icon= new ImageIcon("res/" + ImageName);
final JLabel labelBackground = new JLabel();
ImageIcon im = icon;
labelBackground.setIcon(im);
// 设置label的大小
labelBackground.setBounds(0,0,im.getIconWidth(),im.getIconHeight());
// 将背景图片标签放入面板的最底层
frame.getLayeredPane().add(labelBackground,new Integer(Integer.MIN_VALUE));
// 将容器转换为面板设置为透明
JPanel panel = (JPanel)container;
panel.setOpaque(false);
}
}