Go语言视频零基础入门到精通

Sandara

大家好~ 我现在刚刚接触java，我在网上找到了一个二维码生成器的代码，运行的结果如图，我想在红色的画圈部位加一个具有打印功能的按钮，使其可以打印出生成的二维码，应该怎么修改我的代码？
package com.qrcode.test;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import com.swetake.util.Qrcode;
public class QRGenerator {

private static JFrame mainf;
private static JPanel pannel;
private static JTextArea input;
private static ImagePannel output;
private static JButton generat;
private static GridBagLayout gbl;
private static GridBagConstraints gbc;
private static Graphics2D gs;
private static BufferedImage bi;
     
public void initUI(){
  gbl = new GridBagLayout();
  gbc = new GridBagConstraints();
  mainf = new JFrame("二维码生成器");
  pannel = new JPanel(gbl);
  input = new JTextArea();
  output = new ImagePannel();
  generat = new JButton();
  
  generat.setText("生成二维码");
  generat.addActionListener(new ActionListener() {
   @Override
   public void actionPerformed(ActionEvent arg0) {
    if(!"".equals(input.getText().trim()) && !(input.getText() == null)){
    bi = new BufferedImage(275, 275, BufferedImage.TYPE_INT_RGB);
    for(int i = 0 ; i < 275 ; i++)
     for(int j = 0 ; j < 275 ; j++)
      bi.setRGB(j, i, Color.WHITE.getRGB());
    gs = bi.createGraphics();
    gs.setColor(Color.BLACK);
    Qrcode qrcode = new Qrcode();
    qrcode.setQrcodeEncodeMode('B');//N A ...
    qrcode.setQrcodeErrorCorrect('M');//L M Q H
    qrcode.setQrcodeVersion(7);
    if((input.getText().trim().getBytes()).length > 0 && (input.getText().trim().getBytes()).length < 123){
    boolean[][] rest = qrcode.calQrcode(input.getText().trim().getBytes());
    for(int i = 0 ; i< rest.length ; i++){
     for(int j = 0 ; j < rest.length ; j++){
      if(rest[j][i])
       gs.fillRect(j * 6, i * 6, 6, 6);
     }
    }
    output.setBufferedImage(bi);
    output.repaint();
    File f = new File("c:\\qrcode.png");
    try {
     ImageIO.write(bi, "png", f);
     JOptionPane.showMessageDialog(mainf, new String("恭喜您，2维码生成成功咯！"), "结果提示", JOptionPane.INFORMATION_MESSAGE);
    } catch (IOException e) {
     JOptionPane.showMessageDialog(mainf, new String("很遗憾，2维码生成失败了唉！"), "结果提示", JOptionPane.ERROR_MESSAGE);
     e.printStackTrace();
    }
    }else{
     JOptionPane.showMessageDialog(mainf, new String("编码内容长度不能超过123个字符哦，亲！"), "输入提示", JOptionPane.WARNING_MESSAGE);
    }
   }else
    JOptionPane.showMessageDialog(mainf, new String("编码内容不能为空哦，亲！"), "输入提示", JOptionPane.WARNING_MESSAGE);
   }
  });
  
  gbc.gridx = 0;
  gbc.gridy = 0;
  gbc.weightx = 1;
  gbc.weighty = 1;
  gbc.gridwidth = 1;
  gbc.gridheight = GridBagConstraints.REMAINDER;
  gbc.fill = GridBagConstraints.BOTH;
  input.setLineWrap(true);
  input.setToolTipText("在此输入内容 ");
  gbl.setConstraints(input, gbc);
  pannel.add(input);
  
  gbc.gridx = 1;
  gbc.gridy = 0;
  gbc.weightx = 1;
  gbc.weighty = 1;
  gbc.fill = GridBagConstraints.NONE;
  generat.setToolTipText("点击我生成二维码 ");
  gbc.gridwidth = GridBagConstraints.RELATIVE;
  gbl.setConstraints(generat, gbc);
  pannel.add(generat);
  
  gbc.gridx = 2;
  gbc.gridy = 0;
  gbc.weightx = 265;//分配额外的水平空间
  gbc.weighty = 1;
  gbc.ipady = 100;
  output.setBackground(Color.lightGray);
  output.setToolTipText("二维码生成区域");
  gbc.fill = GridBagConstraints.BOTH;
  gbc.gridwidth = GridBagConstraints.REMAINDER;
  gbl.setConstraints(output, gbc);
  pannel.add(output);
  
  mainf.setResizable(false);
  mainf.setBounds(350, 300, 550, 305);
  mainf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  mainf.add(pannel);
  mainf.setVisible(true);
}
}