java - 使用 barcode4j 创建 gif 条形码

Question

我正在尝试使用 barcode4j 库创建条形码。这就是我得到的:而且看起来很光滑。我是这样做的:

        BitmapCanvasProvider provider = null;


        Interleaved2Of5Bean bean = new Interleaved2Of5Bean();
        int dpi = 100;

        // Configure the barcode generator
        bean.setModuleWidth(UnitConv.in2mm(1.0f /
                                           dpi)); // makes the narrow
        // bar
        // width exactly
        // one
        // pixel

        bean.doQuietZone(false);
        provider =
                new BitmapCanvasProvider(100, BufferedImage.TYPE_BYTE_GRAY,
                                         true, 0);
        bean.generateBarcode(provider, request.getParameter("barcode"));
        provider.finish();


        BufferedImage barcodeImage = provider.getBufferedImage();
        response.setContentType("image/gif");
        OutputStream outputStream = response.getOutputStream();
        ImageIO.write(barcodeImage, "gif", outputStream);
        outputStream.close();

如何增加它的清晰度？

Answer 1

好的，我找到了解决方案。我是这样做的:

    Interleaved2Of5Bean bean = new Interleaved2Of5Bean();

    bean.setHeight(10d);

    bean.doQuietZone(false);

    OutputStream out =
        new java.io.FileOutputStream(new File("output.png"));

    BitmapCanvasProvider provider =
        new BitmapCanvasProvider(out, "image/x-png", 110,
                                 BufferedImage.TYPE_BYTE_GRAY, false,
                                 0);
    bean.generateBarcode(provider, request.getParameter("barcode"));

    provider.finish();

    BufferedImage barcodeImage = provider.getBufferedImage();
    response.setContentType("image/x-png");
    OutputStream outputStream = response.getOutputStream();
    ImageIO.write(barcodeImage, "png", outputStream);
    outputStream.close();