关于使用Zxing的一些问题…

我写下面的代码从图像中读取条形码：

public class BarCodeDecode

{

/**

* @param args

*/

public static void main(String[] args)

{

try

{

String tmpImgFile = "D:\\FormCode128.TIF";

Map tmpHintsMap = new EnumMap(DecodeHintType.class);

tmpHintsMap.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);

tmpHintsMap.put(DecodeHintType.POSSIBLE_FORMATS, EnumSet.allOf(BarcodeFormat.class));

tmpHintsMap.put(DecodeHintType.PURE_BARCODE, Boolean.FALSE);

File tmpFile = new File(tmpImgFile);

String tmpRetString = BarCodeUtil.decode(tmpFile, tmpHintsMap);

//String tmpRetString = BarCodeUtil.decode(tmpFile, null);

System.out.println(tmpRetString);

}

catch (Exception tmpExpt)

{

System.out.println("main: " + "Excpt err! (" + tmpExpt.getMessage() + ")");

}

System.out.println("main: " + "Program end.");

}

}

public class BarCodeUtil

{

private static BarcodeFormat DEFAULT_BARCODE_FORMAT = BarcodeFormat.CODE_128;

/**

* Decode method used to read image or barcode itself, and recognize the barcode,

* get the encoded contents and returns it.

* @param whatFile image that need to be read.

* @param config configuration used when reading the barcode.

* @return decoded results from barcode.

*/

public static String decode(File whatFile, Map whatHints) throws Exception

{

// check the required parameters

if (whatFile == null || whatFile.getName().trim().isEmpty())

throw new IllegalArgumentException("File not found, or invalid file name.");

BufferedImage tmpBfrImage;

try

{

tmpBfrImage = ImageIO.read(whatFile);

}

catch (IOException tmpIoe)

{

throw new Exception(tmpIoe.getMessage());

}

if (tmpBfrImage == null)

throw new IllegalArgumentException("Could not decode image.");

LuminanceSource tmpSource = new BufferedImageLuminanceSource(tmpBfrImage);

BinaryBitmap tmpBitmap = new BinaryBitmap(new HybridBinarizer(tmpSource));

MultiFormatReader tmpBarcodeReader = new MultiFormatReader();

Result tmpResult;

String tmpFinalResult;

try

{

if (whatHints != null && ! whatHints.isEmpty())

tmpResult = tmpBarcodeReader.decode(tmpBitmap, whatHints);

else

tmpResult = tmpBarcodeReader.decode(tmpBitmap);

// setting results.

tmpFinalResult = String.valueOf(tmpResult.getText());

}

catch (Exception tmpExcpt)

{

throw new Exception("BarCodeUtil.decode Excpt err - " + tmpExcpt.toString() + " - " + tmpExcpt.getMessage());

}

return tmpFinalResult;

}

}

我尝试读取包含code128和QRCode的以下两个图像.

它可以适用于code128但不适用于QRCode.

任何人都知道为什么…