Java 二维码编译错误

我正试图制作一个q代码来保存一个数字，以便将其传输给其他人，所以我做了一个测试

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
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.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class QRCode {
static int a = 0;
public static void main(String[] args) throws WriterException, IOException,
  NotFoundException {
int qrCodeData = a;
String filePath = "C://Users/Tommy/QRCode.png";
String charset = "UTF-8"; // or "ISO-8859-1"
Map<EncodeHintType, ErrorCorrectionLevel> hintMap = new HashMap<EncodeHintType,          ErrorCorrectionLevel>();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);

createQRCode(qrCodeData, filePath, charset, hintMap, 200, 200);
System.out.println("QR Code image created successfully!");

System.out.println("Data read from QR Code: "
    + readQRCode(filePath, charset, hintMap));

}

 public static void createQRCode(final int qrCodeData, String filePath,
   String charset, Map hintMap, final int qrCodeheight, final int qrCodewidth)
    throws WriterException, IOException {
    BitMatrix matrix = new MultiFormatWriter().encode(
    new String(qrCodeData.getBytes(charset), charset),
    BarcodeFormat.QR_CODE, qrCodewidth, qrCodeheight);
    MatrixToImageWriter.writeToFile(matrix, filePath.substring(filePath
    .lastIndexOf('.') + 1), new File(filePath));
    }

  public static String readQRCode(String filePath, String charset, Map hintMap)
  throws FileNotFoundException, IOException, NotFoundException {
  BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(
    new BufferedImageLuminanceSource(
        ImageIO.read(new FileInputStream(filePath)))));
  Result qrCodeResult = new MultiFormatReader().decode(binaryBitmap);
  return qrCodeResult.getText();
}
} 

---

我如何解决这个问题？

简单。您正在对int调用

getBytes（）

。这是不可能的

也许可以成为有用的工具

也许是这样

public static final byte[] intToByteArray(int value) {
    return new byte[] {
        (byte)(value >>> 24),
        (byte)(value >>> 16),
        (byte)(value >>> 8),
        (byte)value};
}

---

谢谢，@vidstige，我错过了它真是个白痴等等，你什么意思？

public static final byte[] intToByteArray(int value) {
    return new byte[] {
        (byte)(value >>> 24),
        (byte)(value >>> 16),
        (byte)(value >>> 8),
        (byte)value};
}