google zxing作为二维码生成工具
其他
2018-05-31 05:17:37
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- import com.google.zxing.BarcodeFormat;
- import com.google.zxing.EncodeHintType;
- import com.google.zxing.MultiFormatWriter;
- import com.google.zxing.common.BitMatrix;
- import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import javax.imageio.ImageIO;
- import java.awt.image.BufferedImage;
- import java.io.File;
- import java.io.IOException;
- import java.util.Hashtable;
- import java.util.Map;
-
- public class ZxingUtils {
- private static Log log = LogFactory.getLog(ZxingUtils.class);
-
- private static final int BLACK = 0xFF000000;
- private static final int WHITE = 0xFFFFFFFF;
-
- private static BufferedImage toBufferedImage(BitMatrix matrix) {
- int width = matrix.getWidth();
- int height = matrix.getHeight();
- BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
- for (int x = 0; x < width; x++) {
- for (int y = 0; y < height; y++) {
- image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
- }
- }
- return image;
- }
-
- private static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
- BufferedImage image = toBufferedImage(matrix);
- if (!ImageIO.write(image, format, file)) {
- throw new IOException("Could not write an image of format " + format + " to " + file);
- }
- }
-
-
-
- public static File getQRCodeImge(String contents, int width, String imgPath) {
- return getQRCodeImge(contents, width, width, imgPath);
- }
-
-
-
- public static File getQRCodeImge(String contents, int width, int height, String imgPath) {
- try {
- Map<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
- hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
- hints.put(EncodeHintType.CHARACTER_SET, "UTF8");
-
- BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);
-
- File imageFile = new File(imgPath);
- writeToFile(bitMatrix, "png", imageFile);
-
- return imageFile;
-
- } catch (Exception e) {
- log.error("create QR code error!", e);
- return null;
- }
- }
- }
转载自blog.csdn.net/weixin_39816740/article/details/80512716