http://javapapers.com/core-java/java-qr-code/
<dependency> <groupId>com.google.zxing</groupId> <artifactId>core</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>com.google.zxing</groupId> <artifactId>javase</artifactId> <version>2.2</version> </dependency>
无图片的二维码
package org.quickresponse; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; import com.google.zxing.BarcodeFormat; import com.google.zxing.BinaryBitmap; import com.google.zxing.EncodeHintType; 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 QRCodeSimple { public static void main(String[] args) throws WriterException, IOException, NotFoundException { String qrCodeData = "https://www.gconline.cn/sis/public/pdf/clause/JJJ.pdf"; String filePath = "QRCode.png"; String charset = "UTF-8"; // or "ISO-8859-1" Map hintMap = new HashMap(); hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L); createQRCode(qrCodeData, filePath, charset, hintMap, 200, 200); System.out.println("QR Code image created successfully!"); System.out.println("Data read from QR Code: " + readQRCode(filePath, charset, hintMap)); } public static void createQRCode(String qrCodeData, String filePath, String charset, Map hintMap, int qrCodeheight, int qrCodewidth) throws WriterException, IOException { BitMatrix matrix = new MultiFormatWriter().encode( new String(qrCodeData.getBytes(charset), charset), BarcodeFormat.QR_CODE, qrCodewidth, qrCodeheight, hintMap); MatrixToImageWriter.writeToFile(matrix, filePath.substring(filePath .lastIndexOf('.') + 1), new File(filePath)); } public static String readQRCode(String filePath, String charset, Map hintMap) throws FileNotFoundException, IOException, NotFoundException { BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer( new BufferedImageLuminanceSource( ImageIO.read(new FileInputStream(filePath))))); Result qrCodeResult = new MultiFormatReader().decode(binaryBitmap, hintMap); return qrCodeResult.getText(); } }