ZXING二维码生成中文及空白问题

最近用到二维码生成，网上有很多前人给的例子，就不列举了，我是借鉴此人的博客 用com.google.zxing生成、解析二维码。

这里只补充一点关于中文的支持及二维码四周空白的问题，在3.2.0版本中，稍细心点可以看到

public final class MultiFormatWriter implements Writer {

  @Override
  public BitMatrix encode(String contents,
                          BarcodeFormat format,
                          int width,
                          int height) throws WriterException {
    return encode(contents, format, width, height, null);
  }

  @Override
  public BitMatrix encode(String contents,
                          BarcodeFormat format,
                          int width, int height,
                          Map<EncodeHintType,?> hints) throws WriterException {
...}

 

encoder的方法重载中的参数'Map<EncodeHintType,?> hints' 可以重定义一些设置。

Map<EncodeHintType, Object> hints = new HashMap<>();
hints.put(EncodeHintType.MARGIN, 0);
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");

 

这样就可以生成出无空白且支持中文的二维码了。

 

代码和前人的类似

public class GoogleBarcodeTest {

    private static final int BLACK = 0xff000000;
    private static final int WHITE = 0xFFFFFFFF;

    @Test
    public void test() {
        Map<EncodeHintType, Object> hints = new HashMap<>();
        hints.put(EncodeHintType.MARGIN, 0);
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        try {

            String str = "516030114072545000157500";
            str = "中文不乱码 :)";
            String path = "D://test.png";
            BitMatrix byteMatrix;
            byteMatrix = new MultiFormatWriter().encode(str, BarcodeFormat.QR_CODE, 200, 200, hints);
            File file = new File(path);
            writeToFile(byteMatrix, "png", file);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
        BufferedImage image = toBufferedImage(matrix);
        ImageIO.write(image, format, file);
    }

    public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        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;
    }

}