二维码生成工具

来源：互联网发布：收藏品数据公司编辑：程序博客网时间：2024/05/16 13:54
import com.google.zxing.*;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import org.apache.commons.codec.binary.Base64;import org.apache.commons.codec.binary.Base64OutputStream;import javax.imageio.ImageIO;import java.awt.*;import java.awt.image.BufferedImage;import java.io.*;import java.util.HashMap;import java.util.Map;public class QRCodeUtils {    public static final String QRCODE_DEFAULT_CHARSET = "UTF-8";    public static final int QRCODE_DEFAULT_HEIGHT = 220;    public static final int QRCODE_DEFAULT_WIDTH = 220;    private static final int BLACK = 0xFF000000;    private static final int WHITE = 0xFFFFFFFF;    public static void main(String[] args) throws IOException, NotFoundException {        String data = "http://www.baidu.com";        File logoFile = new File("E:\\1.jpg");        BufferedImage image = QRCodeUtils.createQRCodeWithLogo(data, logoFile);        ImageIO.write(image, "png", new File("E:\\test.png"));        System.out.println("done");    }    /**     * Create qrcode with default settings     *     * @param data     * @return     * @author stefli     */    public static BufferedImage createQRCode(String data) {        return createQRCode(data, QRCODE_DEFAULT_WIDTH, QRCODE_DEFAULT_HEIGHT);    }    /**     * Create qrcode with default charset     *     * @param data     * @param width     * @param height     * @return     * @author stefli     */    public static BufferedImage createQRCode(String data, int width, int height) {        return createQRCode(data, QRCODE_DEFAULT_CHARSET, width, height);    }    /**     * Create qrcode with specified charset     *     * @param data     * @param charset     * @param width     * @param height     * @return     * @author stefli     */    @SuppressWarnings({"unchecked", "rawtypes"})    public static BufferedImage createQRCode(String data, String charset, int width, int height) {        Map hint = new HashMap();        hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);        hint.put(EncodeHintType.CHARACTER_SET, charset);        return createQRCode(data, charset, hint, width, height);    }    /**     * Create qrcode with specified hint     *     * @param data     * @param charset     * @param hint     * @param width     * @param height     * @return     * @author stefli     */    public static BufferedImage createQRCode(String data, String charset, Map<EncodeHintType, ?> hint, int width,                                             int height) {        BitMatrix matrix;        try {            matrix = new MultiFormatWriter().encode(new String(data.getBytes(charset), charset), BarcodeFormat.QR_CODE,                    width, height, hint);            return toBufferedImage(matrix);        } catch (WriterException e) {            throw new RuntimeException(e.getMessage(), e);        } catch (Exception e) {            throw new RuntimeException(e.getMessage(), e);        }    }    public static BufferedImage toBufferedImage(BitMatrix matrix) {        int width = matrix.getWidth();        int height = matrix.getHeight();        BufferedImage image = new BufferedImage(width, height,                BufferedImage.TYPE_INT_RGB);        for (int x = 0; x < width; x++) {            for (int y = 0; y < height; y++) {                image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);            }        }        return image;    }    /**     * Create qrcode with default settings and logo     *     * @param data     * @param logoFile     * @return     * @author stefli     */    public static BufferedImage createQRCodeWithLogo(String data, File logoFile) {        return createQRCodeWithLogo(data, QRCODE_DEFAULT_WIDTH, QRCODE_DEFAULT_HEIGHT, logoFile);    }    /**     * Create qrcode with default charset and logo     *     * @param data     * @param width     * @param height     * @param logoFile     * @return     * @author stefli     */    public static BufferedImage createQRCodeWithLogo(String data, int width, int height, File logoFile) {        return createQRCodeWithLogo(data, QRCODE_DEFAULT_CHARSET, width, height, logoFile);    }    /**     * Create qrcode with specified charset and logo     *     * @param data     * @param charset     * @param width     * @param height     * @param logoFile     * @return     * @author stefli     */    @SuppressWarnings({"unchecked", "rawtypes"})    public static BufferedImage createQRCodeWithLogo(String data, String charset, int width, int height, File logoFile) {        Map hint = new HashMap();        hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);        hint.put(EncodeHintType.CHARACTER_SET, charset);        return createQRCodeWithLogo(data, charset, hint, width, height, logoFile);    }    /**     * Create qrcode with specified hint and logo     *     * @param data     * @param charset     * @param hint     * @param width     * @param height     * @param logoFile     * @return     * @author stefli     */    public static BufferedImage createQRCodeWithLogo(String data, String charset, Map<EncodeHintType, ?> hint,                                                     int width, int height, File logoFile) {        try {            BufferedImage qrcode = createQRCode(data, charset, hint, width, height);            BufferedImage logo = ImageIO.read(logoFile);            /**             * 设置logo的大小,设置为二维码图片的20%,因为过大会盖掉二维码             */            int widthLogo = logo.getWidth(null) > qrcode.getWidth() * 1 / 5 ? (qrcode.getWidth() * 1 / 5) : logo.getWidth(null);            int heightLogo = logo.getHeight(null) > qrcode.getHeight() * 1 / 5 ? (qrcode.getHeight() * 1 / 5) : logo.getWidth(null);            /**             * logo放在中心             */            int x = (qrcode.getWidth() - widthLogo) / 2;            int y = (qrcode.getHeight() - heightLogo) / 2;            //开始绘制图片            Graphics2D g = qrcode.createGraphics();            g.drawImage(logo, x, y, widthLogo, heightLogo, null);            g.dispose();            return qrcode;        } catch (IOException e) {            throw new RuntimeException(e.getMessage(), e);        } catch (Exception e) {            throw new RuntimeException(e.getMessage(), e);        }    }    /**     * Return base64 for image     *     * @param image     * @return     * @author stefli     */    public static String getImageBase64String(BufferedImage image) {        String result = null;        try {            ByteArrayOutputStream os = new ByteArrayOutputStream();            OutputStream b64 = new Base64OutputStream(os);            ImageIO.write(image, "png", b64);            result = os.toString("UTF-8");        } catch (UnsupportedEncodingException e) {            throw new RuntimeException(e.getMessage(), e);        } catch (IOException e) {            throw new RuntimeException(e.getMessage(), e);        }        return result;    }    /**     * Decode the base64Image data to image     *     * @param base64ImageString     * @param file     * @author stefli     */    public static void convertBase64StringToImage(String base64ImageString, File file) {        FileOutputStream os;        try {            Base64 d = new Base64();            byte[] bs = d.decode(base64ImageString);            os = new FileOutputStream(file.getAbsolutePath());            os.write(bs);            os.close();        } catch (FileNotFoundException e) {            throw new RuntimeException(e.getMessage(), e);        } catch (IOException e) {            throw new RuntimeException(e.getMessage(), e);        } catch (Exception e) {            throw new RuntimeException(e.getMessage(), e);        }    }}
转自：https://gitee.com/taotao666/codes/iz5qrg1ohv63pu427k89t36
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