二维条形码的生成与解析
二维条形码的生成与解析

参考文章

<dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>1.7</version></dependency><dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>1.7</version></dependency>

package util.qrcode;import java.awt.image.BufferedImage;import java.io.Closeable;import java.io.File;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.URL;import java.util.Hashtable;import java.util.List;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;import com.google.zxing.BinaryBitmap;import com.google.zxing.EncodeHintType;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.MultiFormatWriter;import com.google.zxing.NotFoundException;import com.google.zxing.Result;import com.google.zxing.WriterException;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;public class QRCodeUtils {/** 私有构造方法 */private QRCodeUtils() { super(); }private static final Hashtable<EncodeHintType, Object> ZXING_HINTS;static {ZXING_HINTS = new Hashtable<EncodeHintType, Object>();ZXING_HINTS.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);ZXING_HINTS.put(EncodeHintType.CHARACTER_SET, "UTF-8");}/** * 将二维码写入数据流 *  * @param out 数据流 * @param lines 数据 * @param width 二维码宽度 * @param height 二维码高度 */public static void writeToOutputStream(OutputStream out, List<String> lines, int width, int height) {StringBuilder sb = new StringBuilder();for (int i = 0; i < lines.size(); i ++) {sb.append(lines.get(i));if (i != lines.size() - 1) {sb.append("\n");}}writeToOutputStream(out, sb.toString(), width, height);}/** * 将二维码写入数据流 *  * @param out 数据流 * @param contents 数据 * @param width 二维码宽度 * @param height 二维码高度 */public static void writeToOutputStream(OutputStream out, String contents, int width, int height) {try {BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, ZXING_HINTS);MatrixToImageWriter.writeToStream(bitMatrix, "png", out);} catch (WriterException e) {throw new RuntimeException(e.getMessage(), e);} catch (IOException e) {throw new RuntimeException(e.getMessage(), e);}}/** * 将二维码写入文件 *  * @param file 文件 * @param lines 数据 * @param width 二维码宽度 * @param height 二维码高度 */public static void writeToFile(File file, List<String> lines, int width, int height) {StringBuilder sb = new StringBuilder();for (int i = 0; i < lines.size(); i ++) {sb.append(lines.get(i));if (i != lines.size() - 1) {sb.append("\n");}}writeToFile(file, sb.toString(), width, height);}/** * 将二维码写入文件 *  * @param file 文件 * @param contents 数据 * @param width 二维码宽度 * @param height 二维码高度 */public static void writeToFile(File file, String contents, int width, int height) {try {BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, ZXING_HINTS);MatrixToImageWriter.writeToFile(bitMatrix, "png", file);} catch (WriterException e) {throw new RuntimeException(e.getMessage(), e);} catch (IOException e) {throw new RuntimeException(e.getMessage(), e);}}/** * 解析二维码 *  * @param image 图片 * @return 信息 */public static String decode(BufferedImage image) {Result result = null;LuminanceSource source = new BufferedImageLuminanceSource(image);BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));try {result = new MultiFormatReader().decode(bitmap, ZXING_HINTS);} catch (NotFoundException e) {throw new RuntimeException(e.getMessage(), e);}return result.getText();}/** * 解析二维码 *  * @param file 图片 * @return 信息 */public static String decode(File file) {BufferedImage image = null;try {image = ImageIO.read(file);} catch (IOException e) {throw new RuntimeException(e.getMessage(), e);}return decode(image);}/** * 解析二维码 *  * @param input 图片 * @return 信息 */public static String decode(InputStream input) {BufferedImage image = null;try {image = ImageIO.read(input);} catch (IOException e) {throw new RuntimeException(e.getMessage(), e);}return decode(image);}/** * 解析二维码 *  * @param url 图片 * @return 信息 */public static String decode(URL url) {BufferedImage image = null;try {image = ImageIO.read(url);} catch (IOException e) {throw new RuntimeException(e.getMessage(), e);}return decode(image);}/** * 关闭 *  * @param closeable 关闭对象 */public static void closeQuietly(Closeable closeable) {if (closeable == null) return;try { closeable.close(); } catch (Exception e) {}}}