QHYun_practice-7

首先准备一张壁纸放在Resource\Image\BackGround文件夹下吧（这个过程还是挺不好弄的，找一张好看的图可不简单= =）

然后在QHgui中写一个背景版的panel

package QHgui;
 
import QHBasic.SConst;
 
import javax.swing.*;
import java.awt.*;
import java.io.FileNotFoundException;
import java.io.IOException;
 
/**
 * <p> TODU </P>
 *
 * @author yeager
 * @Version V1.1.1.0
 * @date 2023/11/22 17:35
 */
public class QHLoginWindow extends JFrame {
    /*--------------------------fileds ---------------------------------*/
    Color color = new Color(27,67,103);
    Color color2 = new Color(27,67,103);
    private  static  final  int  Width = 1536;
    private  static  final  int Height = 864;
 
    //创建一个容器
    Container ct;
    //创建背景面板。
    BackgroundPanel bgp;
 
    /*--------------------------functions ---------------------------------*/
    public QHLoginWindow(String text) throws FileNotFoundException, IOException {
        super(text, null);
        //获取屏幕尺寸
        setSize(400,300);
        getContentPane().setLayout(null);
 
        this.setType(JFrame.Type.UTILITY);
        this.setUndecorated(true);
 
        //移到平面正中
        moveToCenter();
        //添加背景面板
        addBackground();
        //界面初始化完成后，重新界定界面和组件的大小
        nodifyFrameSize();
    }
 
    private void nodifyFrameSize()
    {
        int fraWidth = this.getWidth();//frame的宽
        int fraHeight = this.getHeight();//fra
        // me的高
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        int screenWidth = screenSize.width;
        int screenHeight = screenSize.height;
 
        //重新设定界面尺寸大小
        int winWidth = fraWidth * screenWidth / Width;
        int winHeight = fraHeight *screenHeight / Height;
        this.setSize(winWidth, winHeight);
 
        float proportionW = screenWidth/fraWidth;
        float proportionH = screenHeight/fraHeight;
 
        this.modifyComponentSize(this, proportionW,proportionH);
    }
 
    public static void modifyComponentSize(JFrame frame,float proportionW,float proportionH){
 
        try
        {
            Component[] components = frame.getRootPane().getContentPane().getComponents();
            for(Component co:components)
            {
//                String a = co.getClass().getName();//获取类型名称
//                if(a.equals("javax.swing.JLabel"))
//                {
//                }
                float locX = co.getX() * proportionW;
                float locY = co.getY() * proportionH;
                float width = co.getWidth() * proportionW;
                float height = co.getHeight() * proportionH;
                co.setLocation((int)locX, (int)locY);
                co.setSize((int)width, (int)height);
                int size = (int)(co.getFont().getSize() * proportionH);
                Font font = new Font(co.getFont().getFontName(), co.getFont().getStyle(), size);
                co.setFont(font);
            }
        }
        catch (Exception e)
        {
            // TODO: handle exception
        }
    }
 
    /**
     * 移动到中间
     */
    private void moveToCenter() {
        Container myParent = getParent();
        if (myParent == null) {
            Dimension parentSize = Toolkit.getDefaultToolkit().getScreenSize();
            Point topLeft = new Point(0, 0);
            Dimension mySize = getSize();
            int x, y;
            if (parentSize.width > mySize.width)
                x = ((parentSize.width - mySize.width) / 2) + topLeft.x;
            else
                x = topLeft.x;
            if (parentSize.height > mySize.height)
                y = ((parentSize.height - mySize.height) / 2) + topLeft.y;
            else
                y = topLeft.y;
            setLocation(x, y);
        } else {
            Point topLeft = myParent.getLocationOnScreen();
            Dimension parentSize = myParent.getSize();
            Dimension mySize = getSize();
            int x, y;
            if (parentSize.width > mySize.width)
                x = ((parentSize.width - mySize.width) / 2) + topLeft.x;
            else
                x = topLeft.x;
            if (parentSize.height > mySize.height)
                y = ((parentSize.height - mySize.height) / 2) + topLeft.y;
            else
                y = topLeft.y;
            setLocation(x, y);
        }
    }
 
    /**
     * 添加背景
     * @throws IOException
     * @throws FileNotFoundException
     */
    private void addBackground() throws FileNotFoundException, IOException {
        //不采用任何布局方式。
        ct = this.getContentPane();
        getContentPane().setLayout(null);
 
        //在这里随便找一张400*300的照片既可以看到测试结果。
        bgp = new BackgroundPanel();
        bgp.setBounds(0, 0, 400, 300);
        bgp.setBackground(null);
        bgp.setOpaque(false);
        ct.add(bgp);
    }
}

然后将BackGroundPanel加到登录界面中

  /**
     * 添加背景
     * @throws IOException
     * @throws FileNotFoundException
     */
    private void addBackground() throws FileNotFoundException, IOException {
        //不采用任何布局方式。
        ct = this.getContentPane();
        getContentPane().setLayout(null);
 
        //在这里随便找一张400*300的照片既可以看到测试结果。
        bgp = new BackgroundPanel();
        bgp.setBounds(0, 0, 400, 300);
        bgp.setBackground(null);
        bgp.setOpaque(false);
        ct.add(bgp);
    }

运行结果：