ZXing - atlas_wiki @ ウィキ

概要

サンプル

QRCode.java

   import java.awt.image.BufferedImage;
   import java.io.File;
   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.EncodeHintType;
   import com.google.zxing.WriterException;
   import com.google.zxing.client.j2se.MatrixToImageWriter;
   import com.google.zxing.common.BitMatrix;
   import com.google.zxing.qrcode.QRCodeWriter;
   import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

   public class QRCode {

       public void create() {
           String contents = "http://www.atlas-co.co.jp/";
           BarcodeFormat format = BarcodeFormat.QR_CODE;
           int width = 160;
           int height = 160;

           Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
           hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);

           QRCodeWriter writer = new QRCodeWriter();
           BitMatrix bitMatrix = null;
           try {
               bitMatrix = writer.encode(contents, format, width, height, hints);
           } catch (WriterException e) {
               e.printStackTrace();
           }
           BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);
           try {
               ImageIO.write(image, "png", new File("barcode.png"));
           } catch (IOException e) {
               e.printStackTrace();
           }
       }
   }