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 - 
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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 hints = new HashMap (); 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 hints = new Hashtable (); // 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); } } /** * * writeToFile. *
* * @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 DEFAULT_BORDERCOLOR */ public static final Color DEFAULT_BORDERCOLOR = Color.RED; // logo默认边框宽度 /** Constant DEFAULT_BORDER=2 */ public static final int DEFAULT_BORDER = 2; // logo大小默认为照片的1/5 /** Constant DEFAULT_LOGOPART=5 */ 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); } /** * * Constructor for MatrixToLogoImageConfig. *
* * @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; } /** * * Getter for the field borderColor. *
* * @return a { @link java.awt.Color} object. * @since 0.0.7 */ public Color getBorderColor() { return borderColor; } /** * * Getter for the field border. *
* * @return a int. * @since 0.0.7 */ public int getBorder() { return border; } /** * * Getter for the field logoPart. *
* * @return a int. * @since 0.0.7 */ public int getLogoPart() { return logoPart; }}