二维码工具类

二维码工具类，提供多种生成二维码、解析二维码的方法，包括中间logo的二维码等方法。

 

源码如下：(点击下载 - QrcodeUtils.java、MatrixToImageWriterEx.java、MatrixToLogoImageConfig.java、commons-io-2.4.jar、commons-lang-2.6.jar、slf4j-api-1.7.12.jar、javase-3.1.0.jar、core-3.1.0.jar 、FolderUtils.java)

 

QrcodeUtils.java 源码：

import java.awt.Color;import java.awt.image.BufferedImage;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.URL;import java.util.HashMap;import java.util.Map;import java.util.UUID;import javax.imageio.ImageIO;import org.apache.commons.io.FilenameUtils;import org.apache.commons.io.IOUtils;import org.apache.commons.lang.ArrayUtils;import org.apache.commons.lang.StringUtils;import org.apache.commons.lang.SystemUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.Reader;import com.google.zxing.ReaderException;import com.google.zxing.client.j2se.BufferedImageLuminanceSource;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/** * 二维码工具类 *  */public class QrcodeUtils {    private static final transient Logger LOGGER = LoggerFactory.getLogger(QrcodeUtils.class);    private static transient String DEFAULT_FORMAT = "jpg";    private static transient int DEFAULT_WIDTH = 200;    private static transient int DEFAULT_HEIGHT = 200;    static {        try {            final String[] foo = new String[] { "240", "240" };            final String format = "jpg";            if (StringUtils.isNotBlank(format)) {                DEFAULT_FORMAT = StringUtils.strip(format).toLowerCase();            }            if (ArrayUtils.isNotEmpty(foo) && foo.length == 2) {                Integer tmpWidth = Integer.valueOf(foo[0]);                Integer tmpHeight = Integer.valueOf(foo[1]);                if (tmpWidth > 0 && tmpHeight > 0) {                    DEFAULT_WIDTH = tmpWidth;                    DEFAULT_HEIGHT = tmpHeight;                } else {                    LOGGER.warn("qrcode size must be lager than zero.");                }            }        } catch (Throwable e) {            LOGGER.warn("read default qrcode size config error: ", e);        }    }    /**     * 生成二维码（无中间logo）     *      * @param content     *            二维码文本内容     * @param destFile     *            输出文件     */    public static final void gen(final String content, File destFile) throws Exception {        gen(content, destFile, DEFAULT_WIDTH, DEFAULT_HEIGHT);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param destFile     *            目的文件     * @param logoFile     *            中间logo文件     *      */    public static final void gen(final String content, final File destFile, final File logoFile) throws Exception {        gen(content, destFile, logoFile, DEFAULT_WIDTH, DEFAULT_HEIGHT);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param destFile     *            目的文件     * @param logoFile     *            中间logo文件     * @param width     *            宽度     * @param height     *            高度     */    public static final void gen(final String content, final File destFile,            final File logoFile, int width, int height) throws Exception {        FolderUtils.mkdirs(destFile.getParent());        OutputStream output = null;        InputStream input = null;        try {            output = new BufferedOutputStream(new FileOutputStream(destFile));            if (logoFile != null && logoFile.exists() && logoFile.isFile()) {                input = new BufferedInputStream(new FileInputStream(logoFile));            }            gen(content, output, input, width, height);        } catch (FileNotFoundException e) {            e.printStackTrace();            throw new Exception(e);        } finally {            IOUtils.closeQuietly(output);            IOUtils.closeQuietly(input);        }    }    /**     * 生成二维码（无中间logo）     *      * @param content     *            二维码文本内容     * @param destFile     *            输出文件     * @param width     *            宽度     * @param height     *            高度     */    public static final void gen(final String content, File destFile, int width, int height) throws Exception {        FolderUtils.mkdirs(destFile.getParent());        OutputStream output = null;        try {            output = new BufferedOutputStream(new FileOutputStream(destFile));            gen(content, output, width, height);        } catch (FileNotFoundException e) {            e.printStackTrace();            throw new Exception(e);        } catch (Exception e) {            throw e;        } finally {            IOUtils.closeQuietly(output);        }    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param output     *            输出流     */    public static final void gen(final String content, final OutputStream output) throws Exception {        gen(content, output, DEFAULT_WIDTH, DEFAULT_HEIGHT);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param output     *            输出流     * @param logoInput     *            中间logo输入流，为空时中间无logo     */    public static final void gen(final String content,            final OutputStream output, final InputStream logoInput) throws Exception {        gen(content, output, logoInput, DEFAULT_WIDTH, DEFAULT_HEIGHT);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param output     *            输出流     * @param logoInput     *            中间logo输入流，为空时中间无logo     * @param width     *            宽度     * @param height     *            高度     */    public static final void gen(final String content,            final OutputStream output, final InputStream logoInput, int width, int height) throws Exception {        gen(content, output, logoInput, width, height, ErrorCorrectionLevel.M);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param output     *            输出流     * @param logoInput     *            中间logo输入流，为空时中间无logo     * @param width     *            宽度     * @param height     *            高度     * @param errorCorrectionLevel     *            容错级别     */    public static final void gen(final String content,            final OutputStream output, final InputStream logoInput, int width,            int height, ErrorCorrectionLevel errorCorrectionLevel) throws Exception {        if (StringUtils.isEmpty(content)) {            throw new IllegalArgumentException("qr code content cannot be empty.");        }        if (output == null) {            throw new IllegalArgumentException("qr code output stream cannot be null.");        }        final BitMatrix matrix = MatrixToImageWriterEx.createQRCode(content, width, height, errorCorrectionLevel);        if (logoInput == null) {            try {                MatrixToImageWriter.writeToStream(matrix, DEFAULT_FORMAT, output);                return;            } catch (IOException e) {                e.printStackTrace();                throw new Exception(e);            }        }        final MatrixToLogoImageConfig logoConfig = new MatrixToLogoImageConfig(Color.BLUE, 4);        final String destPath = FilenameUtils.normalizeNoEndSeparator(SystemUtils.getJavaIoTmpDir()                        + File.separator + UUID.randomUUID().toString()                        + ".tmp");        InputStream tmpInput = null;        final File destFile = new File(destPath);        try {            MatrixToImageWriterEx.writeToFile(matrix, DEFAULT_FORMAT, destPath, logoInput, logoConfig);            tmpInput = new BufferedInputStream(new FileInputStream(destFile));            IOUtils.copy(tmpInput, output);        } catch (IOException e) {            e.printStackTrace();            throw new Exception(e);        } finally {            IOUtils.closeQuietly(tmpInput);            destFile.delete();        }    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param output     *            输出流     * @param width     *            宽度     * @param height     *            高度     */    public static final void gen(final String content, final OutputStream output, int width, int height) throws Exception {        gen(content, output, null, width, height);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param destPath     *            输出文件路径     */    public static final void gen(final String content, final String destPath) throws Exception {        gen(content, destPath, DEFAULT_WIDTH, DEFAULT_HEIGHT);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param destPath     *            输出文件路径     * @param width     *            宽度     * @param height     *            高度     */    public static final void gen(final String content, final String destPath, int width, int height) throws Exception {        gen(content, new File(destPath), width, height);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param destPath     *            目的文件路径     * @param logoPath     *            中间logo文件路径     */    public static final void gen(final String content, final String destPath, final String logoPath) throws Exception {        gen(content, destPath, logoPath, DEFAULT_WIDTH, DEFAULT_HEIGHT);    }    /**     * 生成二维码     *      * @param content     *            二维码文本内容     * @param destPath     *            目的文件路径     * @param logoPath     *            中间logo文件路径     * @param width     *            宽度     * @param height     *            高度     */    public static final void gen(final String content, final String destPath,            final String logoPath, int width, int height) throws Exception {        File foo = new File(destPath);        File bar = new File(logoPath);        gen(content, foo, bar, width, height);    }    /**     * 解析二维码     *      * @param input     *            二维码输入流     */    public static final String parse(InputStream input) throws Exception {        Reader reader = null;        BufferedImage image;        try {            image = ImageIO.read(input);            if (image == null) {                throw new Exception("cannot read image from inputstream.");            }            final LuminanceSource source = new BufferedImageLuminanceSource(image);            final BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));            final Map<DecodeHintType, String> hints = new HashMap<DecodeHintType, String>();            hints.put(DecodeHintType.CHARACTER_SET, "utf-8");            // 解码设置编码方式为：utf-8，            reader = new MultiFormatReader();            return reader.decode(bitmap, hints).getText();        } catch (IOException e) {            e.printStackTrace();            throw new Exception("parse QR code error: ", e);        } catch (ReaderException e) {            e.printStackTrace();            throw new Exception("parse QR code error: ", e);        }    }    /**     * 解析二维码     *      * @param url     *            二维码url     */    public static final String parse(URL url) throws Exception {        InputStream in = null;        try {            in = url.openStream();            return parse(in);        } catch (IOException e) {            e.printStackTrace();            throw new Exception("parse QR code error: ", e);        } finally {            IOUtils.closeQuietly(in);        }    }    /**     * 解析二维码     *      * @param file     *            二维码图片文件     */    public static final String parse(File file) throws Exception {        InputStream in = null;        try {            in = new BufferedInputStream(new FileInputStream(file));            return parse(in);        } catch (FileNotFoundException e) {            e.printStackTrace();            throw new Exception("parse QR code error: ", e);        } finally {            IOUtils.closeQuietly(in);        }    }    /**     * 解析二维码     *      * @param filePath     *            二维码图片文件路径     */    public static final String parse(String filePath) throws Exception {        InputStream in = null;        try {            in = new BufferedInputStream(new FileInputStream(filePath));            return parse(in);        } catch (FileNotFoundException e) {            e.printStackTrace();            throw new Exception("parse QR code error: ", e);        } finally {            IOUtils.closeQuietly(in);        }    }}

MatrixToImageWriterEx.java 源码：

import java.awt.BasicStroke;import java.awt.Graphics2D;import java.awt.image.BufferedImage;import java.io.BufferedInputStream;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.util.Hashtable;import javax.imageio.ImageIO;import org.apache.commons.io.IOUtils;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.WriterException;import com.google.zxing.client.j2se.MatrixToImageConfig;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;class MatrixToImageWriterEx {    private static final MatrixToLogoImageConfig DEFAULT_CONFIG = new MatrixToLogoImageConfig();    /**     * 根据内容生成二维码数据     *      * @param content     *            二维码文字内容[为了信息安全性，一般都要先进行数据加密]     * @param width     *            二维码照片宽度     * @param height     *            二维码照片高度     * @param errorCorrectionLevel     *            纠错等级     * @return a {@link com.google.zxing.common.BitMatrix} object.     * @since 0.0.7     */    public static BitMatrix createQRCode(String content, int width, int height,            ErrorCorrectionLevel errorCorrectionLevel) {        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();        // 设置字符编码        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");        // 指定纠错等级        hints.put(EncodeHintType.ERROR_CORRECTION, errorCorrectionLevel);        BitMatrix matrix = null;        try {            matrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);        } catch (WriterException e) {            e.printStackTrace();        }        return matrix;    }    /**     * 根据内容生成二维码数据     *      * @param content     *            二维码文字内容[为了信息安全性，一般都要先进行数据加密]     * @param width     *            二维码照片宽度     * @param height     *            二维码照片高度     * @return a {@link com.google.zxing.common.BitMatrix} object.     * @since 0.0.7     */    public static BitMatrix createQRCode(String content, int width, int height) {        return createQRCode(content, width, height, ErrorCorrectionLevel.H);    }    /**     * 写入二维码、以及将照片logo写入二维码中     *      * @param matrix     *            要写入的二维码     * @param format     *            二维码照片格式     * @param imagePath     *            二维码照片保存路径     * @param logoPath     *            logo路径     * @throws java.io.IOException     *             if any.     * @since 0.0.7     */    public static void writeToFile(BitMatrix matrix, String format,            String imagePath, String logoPath) throws IOException {        InputStream input = null;        try {            input = new BufferedInputStream(new FileInputStream(logoPath));            writeToFile(matrix, format, imagePath, input);        } catch (IOException e) {            throw e;        } finally {            IOUtils.closeQuietly(input);        }    }    /**     * <p>     * writeToFile.     * </p>     *      * @param matrix     *            a {@link com.google.zxing.common.BitMatrix} object.     * @param format     *            a {@link java.lang.String} object.     * @param imagePath     *            a {@link java.lang.String} object.     * @param logoInputStream     *            a {@link java.io.InputStream} object.     * @throws java.io.IOException     *             if any.     * @since 0.0.7     */    public static void writeToFile(BitMatrix matrix, String format,            String imagePath, InputStream logoInputStream) throws IOException {        MatrixToImageWriter.writeToPath(matrix, format, new File(imagePath).toPath(), new MatrixToImageConfig());        // 添加logo图片, 此处一定需要重新进行读取，而不能直接使用二维码的BufferedImage 对象        BufferedImage img = ImageIO.read(new File(imagePath));        MatrixToImageWriterEx.overlapImage(img, format, imagePath, logoInputStream, DEFAULT_CONFIG);    }    /**     * 写入二维码、以及将照片logo写入二维码中     *      * @param matrix     *            要写入的二维码     * @param format     *            二维码照片格式     * @param imagePath     *            二维码照片保存路径     * @param logoPath     *            logo路径     * @param logoConfig     *            logo配置对象     * @throws java.io.IOException     *             if any.     * @since 0.0.7     */    public static void writeToFile(BitMatrix matrix, String format, String imagePath, InputStream logoPath,            MatrixToLogoImageConfig logoConfig) throws IOException {        MatrixToImageWriter.writeToPath(matrix, format, new File(imagePath).toPath(), new MatrixToImageConfig());        // 添加logo图片, 此处一定需要重新进行读取，而不能直接使用二维码的BufferedImage 对象        BufferedImage img = ImageIO.read(new File(imagePath));        MatrixToImageWriterEx.overlapImage(img, format, imagePath, logoPath, logoConfig);    }    /**     * 将照片logo添加到二维码中间     *      * @param image     *            生成的二维码照片对象     * @param imagePath     *            照片保存路径     * @param imagePath     *            照片保存路径     * @param imagePath     *            照片保存路径     * @param imagePath     *            照片保存路径     * @param imagePath     *            照片保存路径     * @param imagePath     *            照片保存路径     * @param logoInputStream     *            logo输入流     * @param formate     *            照片格式     * @param logoConfig     *            a {@link cn.yicha.commons.qrcode.MatrixToLogoImageConfig}     *            object.     * @since 0.0.7     */    public static void overlapImage(BufferedImage image, String formate,            String imagePath, InputStream logoInputStream,            MatrixToLogoImageConfig logoConfig) {        try {            BufferedImage logo = ImageIO.read(logoInputStream);            Graphics2D g = image.createGraphics();            // 考虑到logo照片贴到二维码中，建议大小不要超过二维码的1/5;            int width = image.getWidth() / logoConfig.getLogoPart();            int height = image.getHeight() / logoConfig.getLogoPart();            // logo起始位置，此目的是为logo居中显示            int x = (image.getWidth() - width) / 2;            int y = (image.getHeight() - height) / 2;            // 绘制图            g.drawImage(logo, x, y, width, height, null);            // 给logo画边框            // 构造一个具有指定线条宽度以及 cap 和 join 风格的默认值的实心 BasicStroke            g.setStroke(new BasicStroke(logoConfig.getBorder()));            g.setColor(logoConfig.getBorderColor());            g.drawRect(x, y, width, height);            g.dispose();            // 写入logo照片到二维码            ImageIO.write(image, formate, new File(imagePath));        } catch (Exception e) {            e.printStackTrace();        }    }}

MatrixToLogoImageConfig.java 源码：

import java.awt.Color;class MatrixToLogoImageConfig {    // logo默认边框颜色    /** Constant <code>DEFAULT_BORDERCOLOR</code> */    public static final Color DEFAULT_BORDERCOLOR = Color.RED;    // logo默认边框宽度    /** Constant <code>DEFAULT_BORDER=2</code> */    public static final int DEFAULT_BORDER = 2;    // logo大小默认为照片的1/5    /** Constant <code>DEFAULT_LOGOPART=5</code> */    public static final int DEFAULT_LOGOPART = 5;    private final int border = DEFAULT_BORDER;    private final Color borderColor;    private final int logoPart;    /**     * Creates a default config with on color {@link #BLACK} and off color     * {@link #WHITE}, generating normal black-on-white barcodes.     *      * @since 0.0.7     */    public MatrixToLogoImageConfig() {        this(DEFAULT_BORDERCOLOR, DEFAULT_LOGOPART);    }    /**     * <p>     * Constructor for MatrixToLogoImageConfig.     * </p>     *      * @param borderColor     *            a {@link java.awt.Color} object.     * @param logoPart     *            a int.     * @since 0.0.7     */    public MatrixToLogoImageConfig(Color borderColor, int logoPart) {        this.borderColor = borderColor;        this.logoPart = logoPart;    }    /**     * <p>     * Getter for the field <code>borderColor</code>.     * </p>     *      * @return a {@link java.awt.Color} object.     * @since 0.0.7     */    public Color getBorderColor() {        return borderColor;    }    /**     * <p>     * Getter for the field <code>border</code>.     * </p>     *      * @return a int.     * @since 0.0.7     */    public int getBorder() {        return border;    }    /**     * <p>     * Getter for the field <code>logoPart</code>.     * </p>     *      * @return a int.     * @since 0.0.7     */    public int getLogoPart() {        return logoPart;    }}

转自：小周的博客