使用zxing编写的二维码生成解析工具：QRCoder

TipDialog.java

package com.wolf_pan;

import java.util.Timer;

import java.util.TimerTask;

import javax.swing.JDialog;

import javax.swing.JFrame;

import javax.swing.JLabel;

public class TipDialog extends JDialog {

    public TipDialog(JFrame owner, String tip, int width, int height) {

        super.setUndecorated(true);

        super.setSize(width, height);

        super.setLocationRelativeTo(owner);

        super.add(new JLabel("<html><font color=\"red\">" + tip + "</font></html>", JLabel.CENTER));

    }

    public void show(long duration) {

        setVisible(true);

        new Timer().schedule(new TimerTask() {

            @Override

            public void run() {

                dispose();

            }

        }, duration);

    }

}

PicFileChooser.java

package com.wolf_pan;

import javax.swing.JFileChooser;

import javax.swing.filechooser.FileNameExtensionFilter;

public class PicFileChooser extends JFileChooser {

    public PicFileChooser() {

        FileNameExtensionFilter filter1 = new FileNameExtensionFilter("ICO (*.ico)", "ico");

        FileNameExtensionFilter filter2 = new FileNameExtensionFilter("PNG (*.png)", "png");

        FileNameExtensionFilter filter3 = new FileNameExtensionFilter("TIFF (*.tif;*.tiff)", "tif", "tiff");

        FileNameExtensionFilter filter4 = new FileNameExtensionFilter("GIF (*.gif)", "gif");

        FileNameExtensionFilter filter5 = new FileNameExtensionFilter("JPEG (*.jpg;*.jpeg;*.jpe;*.jfif)", "jpg", "jpeg", "jpe", "jfif");

        FileNameExtensionFilter filter6 = new FileNameExtensionFilter("Bitmap Files (*.bmp)", "bmp", "dib");

        FileNameExtensionFilter filter7 = new FileNameExtensionFilter("All Picture Files", "ico", "png", "tif", "tiff", "gif", "jpg", "jpeg", "jpe", "jfif", "bmp", "dib");

        super.setFileFilter(filter1);

        super.setFileFilter(filter2);

        super.setFileFilter(filter3);

        super.setFileFilter(filter4);

        super.setFileFilter(filter5);

        super.setFileFilter(filter6);

        super.setFileFilter(filter7);

        super.setAcceptAllFileFilterUsed(false);

    }

}

MainFrame.java

package com.wolf_pan;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.BinaryBitmap;

import com.google.zxing.ChecksumException;

import com.google.zxing.EncodeHintType;

import com.google.zxing.FormatException;

import com.google.zxing.NotFoundException;

import com.google.zxing.WriterException;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.common.HybridBinarizer;

import com.google.zxing.qrcode.QRCodeReader;

import com.google.zxing.qrcode.QRCodeWriter;

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.Desktop;

import java.awt.FlowLayout;

import java.awt.Toolkit;

import java.awt.event.ActionEvent;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.net.URI;

import java.util.HashMap;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.imageio.ImageIO;

import javax.swing.ImageIcon;

import javax.swing.JButton;

import javax.swing.JFileChooser;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JMenuItem;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JPopupMenu;

import javax.swing.JScrollPane;

import javax.swing.JTabbedPane;

import javax.swing.JTextArea;

import javax.swing.event.ChangeEvent;

import javax.swing.filechooser.FileNameExtensionFilter;

public class MainFrame extends JFrame {

    private JTabbedPane tabbedPane;

    private HintTextArea textToEncodeHintTextArea;

    private JTextArea decodedResultTextArea;

    private JLabel encodedImageLabel, qrcodeToDecodeLabel, tipLabel;

    private JButton encodeButton, chooseButton, decodeButton, contactAuthorButton;

    private JPopupMenu popupMenu;

    private JMenuItem copyMenuItem, saveMenuItem;

    private BufferedImage qrcodeBufferedImage;

    private String qrcodePicFilename;

    private static final Logger LOGGER = Logger.getLogger(MainFrame.class.getName());

    private MainFrame() {

        super("QRCoder");

        initializeComponents();

        initializeEventListeners();

    }

    private void initializeComponents() {

        setSize(400, 600);

        setLocationRelativeTo(null);

        setDefaultCloseOperation(EXIT_ON_CLOSE);

        tabbedPane = new JTabbedPane();

        JPanel encodePanel = new JPanel(new BorderLayout()), decodePanel = new JPanel(new BorderLayout()), authorPanel = new JPanel(new BorderLayout());

        textToEncodeHintTextArea = new HintTextArea("Type text you want to encode here", 4);

        encodePanel.add(new JScrollPane(textToEncodeHintTextArea), BorderLayout.NORTH);

        encodedImageLabel = new JLabel();

        encodedImageLabel.setHorizontalAlignment(JLabel.CENTER);

        encodePanel.add(encodedImageLabel);

        JPanel southEncodePanel = new JPanel(new FlowLayout(FlowLayout.RIGHT, 10, 0));

        tipLabel = new JLabel("<html><font color=\"blue\" size=\"8\">Tip</font></html>");

        southEncodePanel.add(tipLabel);

        encodeButton = new JButton("Encode");

        southEncodePanel.add(encodeButton);

        encodePanel.add(southEncodePanel, BorderLayout.SOUTH);

        tabbedPane.add("Encode", encodePanel);

        JPanel northPanel = new JPanel(new BorderLayout());

        JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));

        chooseButton = new JButton("Choose...");

        buttonPanel.add(chooseButton);

        decodeButton = new JButton("Decode");

        buttonPanel.add(decodeButton);

        northPanel.add(buttonPanel, BorderLayout.NORTH);

        decodedResultTextArea = new JTextArea(4, 0);

        decodedResultTextArea.setLineWrap(true);

        decodedResultTextArea.setEditable(false);

        JPanel decodedResultPanel = new JPanel(new BorderLayout());

        JLabel decodedResultLabel = new JLabel("<html><font size=\"5\">Decoded result:</font></html>");

        decodedResultPanel.add(decodedResultLabel, BorderLayout.NORTH);

        decodedResultPanel.add(new JScrollPane(decodedResultTextArea));

        northPanel.add(decodedResultPanel);

        decodePanel.add(northPanel, BorderLayout.NORTH);

        qrcodeToDecodeLabel = new JLabel(new ImageIcon(MainFrame.class.getResource("/images/author.jpg")));

        decodePanel.add(qrcodeToDecodeLabel);

        tabbedPane.add("Decode", decodePanel);

        JLabel authorLabel = new JLabel("<html><br /><font size=\"20\">作者：布伊什<br />QQ: 980639902</font></html>", JLabel.CENTER);

        authorPanel.add(authorLabel, BorderLayout.NORTH);

        JLabel authorQRCodeLabel = new JLabel(new ImageIcon(MainFrame.class.getResource("/images/author.jpg")));

        authorPanel.add(authorQRCodeLabel);

        contactAuthorButton = new JButton("联系作者");

        JPanel contactAuthorButtonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));

        contactAuthorButtonPanel.add(contactAuthorButton);

        authorPanel.add(contactAuthorButtonPanel, BorderLayout.SOUTH);

        tabbedPane.add("Author", authorPanel);

        add(tabbedPane);

        popupMenu = new JPopupMenu();

        copyMenuItem = new JMenuItem("Copy");

        popupMenu.add(copyMenuItem);

        saveMenuItem = new JMenuItem("Save");

        popupMenu.add(saveMenuItem);

    }

    private void initializeEventListeners() {

        tabbedPane.addChangeListener((ChangeEvent ev) -> {

            if (tabbedPane.getSelectedIndex() == 0) {

                encodeButton.requestFocus();

            }

        });

        encodeButton.addActionListener((ActionEvent ev) -> {

            onEncodeButtonClicked();

        });

        chooseButton.addActionListener((ActionEvent ev) -> {

            onChooseButtonClicked();

        });

        decodeButton.addActionListener((ActionEvent ev) -> {

            onDecodeButtonClicked();

        });

        contactAuthorButton.addActionListener((ActionEvent ev) -> {

            onContactAuthorButtonClicked();

        });

        encodedImageLabel.addMouseListener(new MouseAdapter() {

            @Override

            public void mouseClicked(MouseEvent ev) {

                onEncodedImageLabelClicked(ev);

            }

        });

        tipLabel.addMouseListener(new MouseAdapter() {

            private TipDialog tipDialog;

            @Override

            public void mouseEntered(MouseEvent ev) {

                tipDialog = new TipDialog(MainFrame.this, "右键单击生成的二维码弹出工具菜单", 220, 30);

                tipDialog.setVisible(true);

            }

            @Override

            public void mouseExited(MouseEvent ev) {

                tipDialog.dispose();

            }

        });

        copyMenuItem.addActionListener((ActionEvent ev) -> {

            onCopyMenuItemClicked();

        });

        saveMenuItem.addActionListener((ActionEvent ev) -> {

            onSaveMenuItemClicked();

        });

    }

    private void onEncodeButtonClicked() {

        try {

            String contents = textToEncodeHintTextArea.getText();

            int width = encodedImageLabel.getWidth() - 20;

            int height = encodedImageLabel.getHeight() - 20;

            HashMap<EncodeHintType, String> hints = new HashMap<>();

            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

            BitMatrix bitMatrix = new QRCodeWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);

            qrcodeBufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

            for (int y = 0; y < height; ++y) {

                for (int x = 0; x < width; ++x) {

                    Color color = bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE;

                    qrcodeBufferedImage.setRGB(x, y, color.getRGB());

                }

            }

            encodedImageLabel.setIcon(new ImageIcon(qrcodeBufferedImage));

        } catch (WriterException ex) {

            LOGGER.log(Level.SEVERE, null, ex);

            JOptionPane.showMessageDialog(this, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);

        }

    }

    private void onChooseButtonClicked() {

        PicFileChooser picFileChooser = new PicFileChooser();

        if (picFileChooser.showOpenDialog(this) == PicFileChooser.APPROVE_OPTION) {

            qrcodePicFilename = picFileChooser.getSelectedFile().getAbsolutePath();

            qrcodeToDecodeLabel.setIcon(new ImageIcon(qrcodePicFilename));

        }

    }

    private void onDecodeButtonClicked() {

        try {

            BufferedImage qrcodeToDecodeBufferedImage;

            if (qrcodePicFilename == null) {

                qrcodeToDecodeBufferedImage = ImageIO.read(MainFrame.class.getResource("/images/author.jpg"));

            } else {

                qrcodeToDecodeBufferedImage = ImageIO.read(new File(qrcodePicFilename));

            }

            BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(qrcodeToDecodeBufferedImage);

            String decodedText = new QRCodeReader().decode(new BinaryBitmap(new HybridBinarizer(source))).getText();

            decodedResultTextArea.setText(decodedText);

        } catch (ChecksumException | FormatException | NotFoundException | IOException ex) {

            LOGGER.log(Level.SEVERE, null, ex);

            if (ex instanceof NotFoundException) {

                JOptionPane.showMessageDialog(this, "QR code not found", "Error", JOptionPane.ERROR_MESSAGE);

            } else {

                JOptionPane.showMessageDialog(this, "Cannot decode the QR code", "Unknown Error", JOptionPane.ERROR_MESSAGE);

            }

        }

    }

    private void onContactAuthorButtonClicked() {

        try {

            Desktop.getDesktop().browse(URI.create("tencent://message/?uin=980639902"));

        } catch (IOException ex) {

            LOGGER.log(Level.SEVERE, null, ex);

        }

    }

    private void onEncodedImageLabelClicked(MouseEvent ev) {

        if (ev.getButton() == MouseEvent.BUTTON3) {

            popupMenu.show(encodedImageLabel, ev.getX(), ev.getY());

        }

    }

    private void onCopyMenuItemClicked() {

        if (qrcodeBufferedImage != null) {

            ImageSelection contents = new ImageSelection(qrcodeBufferedImage);

            Toolkit.getDefaultToolkit().getSystemClipboard().setContents(contents, null);

            TipDialog tipDialog = new TipDialog(this, "Copied to clipboard", 150, 30);

            tipDialog.show(1500);

        }

    }

    private void onSaveMenuItemClicked() {

        if (qrcodeBufferedImage != null) {

            JFileChooser fileChooser = new JFileChooser();

            fileChooser.setFileFilter(new FileNameExtensionFilter("PNG (*.png)", "png"));

            fileChooser.setFileFilter(new FileNameExtensionFilter("Bitmap Files (*.bmp)", "bmp"));

            fileChooser.setAcceptAllFileFilterUsed(false);

            if (fileChooser.showSaveDialog(this) == PicFileChooser.APPROVE_OPTION) {

                try {

                    String formatName;

                    if (fileChooser.getFileFilter().getDescription().equals("PNG (*.png)")) {

                        formatName = "png";

                    } else {

                        formatName = "bmp";

                    }

                    File destinationFile = new File(fileChooser.getSelectedFile() + "." + formatName);

                    if (ImageIO.write(qrcodeBufferedImage, formatName, destinationFile)) {

                        TipDialog tipDialog = new TipDialog(this, "Saved to disk", 150, 30);

                        tipDialog.show(1500);

                    }

                } catch (IOException ex) {

                    LOGGER.log(Level.SEVERE, null, ex);

                }

            }

        }

    }

    public static void main(String[] args) {

        MainFrame mainFrame = new MainFrame();

        mainFrame.setVisible(true);

    }

}

ImageSelection.java

package com.wolf_pan;

import java.awt.Image;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.Transferable;

import java.awt.datatransfer.UnsupportedFlavorException;

public class ImageSelection implements Transferable {

    private final Image image;

    public ImageSelection(Image image) {

        this.image = image;

    }

    @Override

    public DataFlavor[] getTransferDataFlavors() {

        return new DataFlavor[]{DataFlavor.imageFlavor};

    }

    @Override

    public boolean isDataFlavorSupported(DataFlavor flavor) {

        return flavor.equals(DataFlavor.imageFlavor);

    }

    @Override

    public Image getTransferData(DataFlavor flavor) throws UnsupportedFlavorException {

        if (!isDataFlavorSupported(flavor)) {

            throw new UnsupportedFlavorException(flavor);

        }

        return image;

    }

}

HintTextArea.java

package com.wolf_pan;

import java.awt.Color;

import java.awt.event.FocusEvent;

import java.awt.event.FocusListener;

import javax.swing.JTextArea;

public class HintTextArea extends JTextArea {

    public HintTextArea(String hint, int rows) {

        super(hint, rows, 0);

        super.setForeground(Color.GRAY);

        super.addFocusListener(new FocusListener() {

            @Override

            public void focusGained(FocusEvent e) {

                if (getForeground() == Color.GRAY && hint.equals(getText())) {

                    setText(null);

                    setForeground(Color.BLACK);

                }

            }

            @Override

            public void focusLost(FocusEvent e) {

                if (getText().equals("")) {

                    setText(hint);

                    setForeground(Color.GRAY);

                }

            }

        });

    }

}

巴特西

使用zxing编写的二维码生成解析工具：QRCoder

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