Swing_如何在图片上添加组件而不被覆盖

Swing_如何在图片上添加组件而不被覆盖

可能有些同学在做java的图形界面时，总是觉得界面不太好看。
就像下面这样。但是又无奈不知道怎么在图片上添加组件

当我们稍作修改后，摇身一变

核心代码

要在JFrame上添加背景图片，常见做法是加在layeredPane上面，并将contentPane设置成透明的即可。

panel = (JPanel) getContentPane();//将内容面板设置为JPanel面板
        panel.setOpaque(false);//将面板设置为透明
        label = new JLabel(icon);//将图片封装到JLabel中
        getLayeredPane().add(label, Integer.valueOf(Integer.MIN_VALUE));//再将JLabel设置为最底层，然后再在JLabel上添加组件
        label.setBounds(0, 0, icon.getIconWidth(), icon.getIconHeight());//将label的大小设置为图片的大小
        panel.setLayout(null);//使用绝对布局

JLayeredPane面板主要是为Swing容器添加深度，它允许组件在必要的时候相互重叠。就是将组件放入不同的层内，这样可用保证组件能够正确的重叠

这里因为把面板设置为了透明，但组件并没有设置为透明，所以从正面看就像是将组件镶嵌在图片上。

全部代码

package ki;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Enumeration;

public class RegiestFrame extends JFrame {
    
    
    private JPanel panel;
    private JLabel label, username, sex, pwd, repwd, prompt;
    private JTextField usernameFid;
    private JPasswordField pwdFid, repwdFid;
    private JRadioButton mRbtn, wRbtn;
    private ButtonGroup buttonGroup;
    private ImageIcon icon = new ImageIcon("img/司马懿.png");
    private JButton back, confirm;
    private Font font = new Font("宋体", Font.BOLD, 13);
    private boolean flag;

    public RegiestFrame() throws HeadlessException {
    
    
        setTitle("注册账号");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(690, 439);
        setLocationRelativeTo(null);
        setResizable(false);

        panel = (JPanel) getContentPane();
        panel.setOpaque(false);//将面板设置为透明
        label = new JLabel(icon);
        getLayeredPane().add(label, Integer.valueOf(Integer.MIN_VALUE));
        label.setBounds(0, 0, icon.getIconWidth(), icon.getIconHeight());
        panel.setLayout(null);


        //用户名
        username = new JLabel("用户名:");
        username.setBounds(120, 100, 50, 28);
        username.setFont(font);
        username.setForeground(new Color(196, 255, 14));
        panel.add(username);

        usernameFid = new JTextField();
        usernameFid.setBounds(172, 102, 150, 23);
        usernameFid.setHorizontalAlignment(SwingConstants.CENTER);
        usernameFid.setFont(new Font("楷体", Font.BOLD, 13));
        panel.add(usernameFid);


        //性别单选按钮
        sex = new JLabel("性  别:");
        sex.setBounds(120, 140, 50, 28);
        sex.setForeground(new Color(196, 255, 14));
        sex.setFont(font);
        panel.add(sex);

        mRbtn = new JRadioButton("男", true);
        mRbtn.setBounds(190, 147, 15, 15);
        mRbtn.setBackground(Color.black);
        JLabel man = new JLabel("男");
        man.setForeground(Color.red);
        man.setBounds(205, 147, 15, 15);
        panel.add(man);

        wRbtn = new JRadioButton("女");
        wRbtn.setBounds(258, 147, 15, 15);
        wRbtn.setBackground(Color.BLACK);
        JLabel woman = new JLabel("女");
        woman.setBounds(273, 147, 15, 15);
        woman.setForeground(Color.red);
        panel.add(woman);

        buttonGroup = new ButtonGroup();
        buttonGroup.add(mRbtn);
        buttonGroup.add(wRbtn);
        panel.add(mRbtn);
        panel.add(wRbtn);

        //密码
        pwd = new JLabel("密  码:");
        pwd.setBounds(120, 180, 50, 28);
        pwd.setForeground(new Color(196, 255, 14));
        pwd.setFont(font);

        pwdFid = new JPasswordField();
        pwdFid.setBounds(172, 182, 150, 23);
        panel.add(pwd);
        panel.add(pwdFid);

        //确认密码
        repwd = new JLabel("确认密码:");
        repwd.setBounds(116, 228, 60, 28);
        repwd.setForeground(new Color(196, 255, 14));
        repwd.setFont(font);

        repwdFid = new JPasswordField();
        repwdFid.setBounds(172, 230, 150, 23);
        panel.add(repwd);
        panel.add(repwdFid);

        //按钮
        confirm = new JButton("提交");
        confirm.setBackground(Color.BLUE);
        confirm.setForeground(Color.YELLOW);
        confirm.setFocusPainted(false);
        confirm.setFont(font);
        confirm.setBounds(153, 278, 75, 32);
        panel.add(confirm);
        confirm.addMouseListener(new MouseAdapter() {
    
    
            @Override
            public void mouseEntered(MouseEvent e) {
    
    
                setCursor(new Cursor(12));
            }

            @Override
            public void mouseExited(MouseEvent e) {
    
    
                setCursor(new Cursor(0));
            }
        });

        back = new JButton("返回");
        back.setBackground(Color.BLUE);
        back.setFocusPainted(false);
        back.setForeground(Color.YELLOW);
        back.setFont(font);
        back.setBounds(255, 278, 75, 32);
        panel.add(back);
        back.addMouseListener(new MouseAdapter() {
    
    
            @Override
            public void mouseEntered(MouseEvent e) {
    
    
                setCursor(new Cursor(12));

            }

            @Override
            public void mouseExited(MouseEvent e) {
    
    
                setCursor(new Cursor(0));

            }
        });
        setVisible(true);

    }

    public static void main(String[] args) {
    
    
        new RegiestFrame();
    }

}

提供的案例图片：