QRCodeGenerator.java
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package com.huaheng.common.utils;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.datamatrix.DataMatrixWriter;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* 生成二维码
* @author Enzo Cotter
* @date 2020/2/21
*/
public class QRCodeGenerator {
public static byte[] getQRCodeImage(String text, int width, int height,boolean whiten) throws WriterException, IOException {
QRCodeWriter qrCodeWriter = new QRCodeWriter();
BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height);
if (whiten)
{
bitMatrix = deleteWhite(bitMatrix);
}
ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();
MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream);
byte[] pngData = pngOutputStream.toByteArray();
return pngData;
}
/**
* 删除白边
* */
private static BitMatrix deleteWhite(BitMatrix matrix) {
int[] rec = matrix.getEnclosingRectangle();
int resWidth = rec[2] + 1;
int resHeight = rec[3] + 1;
BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);
resMatrix.clear();
for (int i = 0; i < resWidth; i++) {
for (int j = 0; j < resHeight; j++) {
if (matrix.get(i + rec[0], j + rec[1])) {
resMatrix.set(i, j);
}
}
}
return resMatrix;
}
public static byte[] getDataMatrixImage(String text, int width, int height) throws WriterException, IOException {
Map<EncodeHintType,Object> hints = new HashMap<EncodeHintType, Object>();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
DataMatrixWriter dataMatrixWriter = new DataMatrixWriter();
BitMatrix bitMatrix = dataMatrixWriter.encode(text, BarcodeFormat.DATA_MATRIX, width, height,hints);
ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();
MatrixToImageWriter.writeToStream(bitMatrix, "jpg", pngOutputStream);
byte[] pngData = pngOutputStream.toByteArray();
return pngData;
}
}