├── .gitignore ├── .idea ├── compiler.xml ├── libraries │ ├── Maven__com_beust_jcommander_1_48.xml │ ├── Maven__com_github_jai_imageio_jai_imageio_core_1_3_1.xml │ ├── Maven__com_google_zxing_core_3_3_0.xml │ └── Maven__com_google_zxing_javase_3_3_0.xml ├── misc.xml ├── modules.xml ├── uiDesigner.xml └── workspace.xml ├── MyQRCode.png ├── Readme.md ├── pom.xml ├── qr-code-generator-and-reader.iml └── src └── main └── java └── com └── callicoder ├── QRCodeGenerator.java └── QRCodeReader.java /.gitignore: -------------------------------------------------------------------------------- 1 | target/ 2 | *.class 3 | *.iml 4 | .idea 5 | -------------------------------------------------------------------------------- /.idea/compiler.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | -------------------------------------------------------------------------------- /.idea/libraries/Maven__com_beust_jcommander_1_48.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | -------------------------------------------------------------------------------- /.idea/libraries/Maven__com_github_jai_imageio_jai_imageio_core_1_3_1.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | -------------------------------------------------------------------------------- /.idea/libraries/Maven__com_google_zxing_core_3_3_0.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | -------------------------------------------------------------------------------- /.idea/libraries/Maven__com_google_zxing_javase_3_3_0.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 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-------------------------------------------------------------------------------- 1 | # Generate and Read QR Code in Java 2 | 3 | Relevant Tutorials - 4 | 5 | + https://www.callicoder.com/generate-qr-code-in-java-using-zxing/ 6 | + https://www.callicoder.com/qr-code-reader-scanner-in-java-using-zxing/ 7 | 8 | ## Steps to Run 9 | 10 | 1. Clone the repository 11 | 12 | ``` 13 | git clone git@github.com:callicoder/qr-code-generator-and-reader.git 14 | ``` 15 | 16 | 2. Run the program using maven 17 | 18 | ``` 19 | cd qr-code-generator-and-reader 20 | mvn package 21 | java -jar target/qr-code-generator-and-reader-1.0-SNAPSHOT.jar 22 | ``` 23 | 24 | -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 5 | 4.0.0 6 | 7 | com.example 8 | qr-code-generator-and-reader 9 | 1.0-SNAPSHOT 10 | 11 | 12 | 1.8 13 | 14 | 15 | 16 | 17 | com.google.zxing 18 | core 19 | 3.3.0 20 | 21 | 22 | com.google.zxing 23 | javase 24 | 3.3.0 25 | 26 | 27 | 28 | 29 | 30 | 31 | org.apache.maven.plugins 32 | maven-compiler-plugin 33 | 3.6.2 34 | ${java.version} 35 | ${java.version} 36 | 37 | 38 | 39 | org.apache.maven.plugins 40 | maven-dependency-plugin 41 | 3.0.1 42 | 43 | 44 | copy-dependencies 45 | package 46 | 47 | copy-dependencies 48 | 49 | 50 | 51 | ${project.build.directory}/lib/ 52 | 53 | 54 | 55 | 56 | 57 | 58 | org.apache.maven.plugins 59 | maven-jar-plugin 60 | 3.0.2 61 | 62 | 63 | 64 | true 65 | lib/ 66 | com.callicoder.QRCodeGenerator 67 | 68 | 69 | 70 | 71 | 72 | 73 | -------------------------------------------------------------------------------- /qr-code-generator-and-reader.iml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | -------------------------------------------------------------------------------- /src/main/java/com/callicoder/QRCodeGenerator.java: -------------------------------------------------------------------------------- 1 | package com.callicoder; 2 | 3 | import com.google.zxing.BarcodeFormat; 4 | import com.google.zxing.WriterException; 5 | import com.google.zxing.client.j2se.MatrixToImageWriter; 6 | import com.google.zxing.common.BitMatrix; 7 | import com.google.zxing.qrcode.QRCodeWriter; 8 | 9 | import java.io.ByteArrayOutputStream; 10 | import java.io.IOException; 11 | import java.nio.file.FileSystems; 12 | import java.nio.file.Path; 13 | 14 | /** 15 | * Created by rajeevkumarsingh on 22/08/17. 16 | */ 17 | public class QRCodeGenerator { 18 | private static final String QR_CODE_IMAGE_PATH = "./MyQRCode.png"; 19 | 20 | private static void generateQRCodeImage(String text, int width, int height, String filePath) 21 | throws WriterException, IOException { 22 | QRCodeWriter qrCodeWriter = new QRCodeWriter(); 23 | BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height); 24 | 25 | Path path = FileSystems.getDefault().getPath(filePath); 26 | MatrixToImageWriter.writeToPath(bitMatrix, "PNG", path); 27 | } 28 | 29 | private byte[] getQRCodeImageByteArray(String text, int width, int height) throws WriterException, IOException { 30 | QRCodeWriter qrCodeWriter = new QRCodeWriter(); 31 | BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height); 32 | 33 | ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream(); 34 | MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream); 35 | byte[] pngData = pngOutputStream.toByteArray(); 36 | return pngData; 37 | } 38 | 39 | public static void main(String[] args) { 40 | try { 41 | generateQRCodeImage("This is my first QR Code", 350, 350, QR_CODE_IMAGE_PATH); 42 | } catch (WriterException e) { 43 | System.out.println("Could not generate QR Code, WriterException :: " + e.getMessage()); 44 | } catch (IOException e) { 45 | System.out.println("Could not generate QR Code, IOException :: " + e.getMessage()); 46 | } 47 | } 48 | } 49 | -------------------------------------------------------------------------------- /src/main/java/com/callicoder/QRCodeReader.java: -------------------------------------------------------------------------------- 1 | package com.callicoder; 2 | 3 | import com.google.zxing.*; 4 | import com.google.zxing.client.j2se.BufferedImageLuminanceSource; 5 | import com.google.zxing.common.HybridBinarizer; 6 | import javax.imageio.ImageIO; 7 | import java.awt.image.BufferedImage; 8 | import java.io.File; 9 | import java.io.IOException; 10 | 11 | public class QRCodeReader { 12 | 13 | private static String decodeQRCode(File qrCodeimage) throws IOException { 14 | BufferedImage bufferedImage = ImageIO.read(qrCodeimage); 15 | LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage); 16 | BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); 17 | 18 | try { 19 | Result result = new MultiFormatReader().decode(bitmap); 20 | return result.getText(); 21 | } catch (NotFoundException e) { 22 | System.out.println("There is no QR code in the image"); 23 | return null; 24 | } 25 | } 26 | 27 | public static void main(String[] args) { 28 | try { 29 | File file = new File("./MyQRCode.png"); 30 | String decodedText = decodeQRCode(file); 31 | if(decodedText == null) { 32 | System.out.println("No QR Code found in the image"); 33 | } else { 34 | System.out.println("Decoded text = " + decodedText); 35 | } 36 | } catch (IOException e) { 37 | System.out.println("Could not decode QR Code, IOException :: " + e.getMessage()); 38 | } 39 | } 40 | } --------------------------------------------------------------------------------