摘要：
如果需要更加定制化的二维码，也可接通第三方API服务生成二维码。
前言： 这周有个项目需要生成二维码，研究了一下使用Google的zxing生成二维码，发现效果还可以，在这里记录下。如果需要更加定制化的二维码，也可接通第三方API服务生成二维码。
一、生成二维码 :
@Component("qrcodeHandler")
public class QrcodeHandlerImpl implementsQrcodeHandler {
private static final Logger logger = LoggerFactory.getLogger(QrcodeHandlerImpl.class);
/**二维码颜色 */
private static final int FRONT_COLOR = 0xFF000000; //前景色黑色
private static final int BACK_COLOR = 0xFFFFFFFF; //背景色白色
/**编码格式 */
private static final String CHARACTER_SET = "UTF-8";
/**图片类型 */
private static final String FORMAT = "png";
/**二维码尺寸 */
private static final int QRCODE_SIZE = 300;
/**logo信息 */
private static final int LOGO_SIZE = 60;
private static final HashMap<EncodeHintType, Object>hints;
static{
hints = new HashMap<EncodeHintType, Object>();
hints.put(EncodeHintType.CHARACTER_SET, CHARACTER_SET);
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
hints.put(EncodeHintType.MARGIN, 1);
}
/**
* 生成简单的二维码
*
* @param contents 二维码实际内容，包括网址、文本、文件等, 如http://www.cnblogs.com/ark-blog/
* @param destFile 生成的二维码文件
*/
public voidgenerateSimpleQrcode(String contents, File destFile) {
try{
//1. 生成位矩阵
BitMatrix bitMatrix = newMultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
//2. 保存图片
MatrixToImageWriter.writeToPath(bitMatrix, FORMAT, destFile.toPath());
} catch(Exception e) {
logger.error("#generateSimpleQrcode() - create qrcode failed, exception=[{}]", e);
throw BusinessException.newInstance("500", "create qrcode failed");
}
}
/**
* 生成带logo的二维码
*
* @param contents 二维码实际内容，包括网址、文本、文件等, 如http://www.cnblogs.com/ark-blog/
* @param logoFile logo
* @param destFile 生成的二维码文件
*/
public voidgenerateLogoQrcode(String contents, File logoFile, File destFile) {
try{
//1. 创建位矩阵图
MultiFormatWriter multiFormatWriter = newMultiFormatWriter();
BitMatrix bitMatrix =multiFormatWriter.encode(contents, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
BufferedImage qrcodeImage = newBufferedImage(QRCODE_SIZE, QRCODE_SIZE, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < QRCODE_SIZE; x++) {
for (int y = 0; y < QRCODE_SIZE; y++) {
qrcodeImage.setRGB(x, y, bitMatrix.get(x, y) ?FRONT_COLOR : BACK_COLOR);
}
}
//2. 在矩阵图上绘制logo
Image logoImage =ImageIO.read(logoFile);
BufferedImage logoBufferedImage = newBufferedImage(LOGO_SIZE, LOGO_SIZE, BufferedImage.TYPE_INT_RGB);
logoBufferedImage.getGraphics().drawImage(logoImage, 0, 0, null);
int position = (QRCODE_SIZE - LOGO_SIZE) / 2;
Graphics2D graphics2d =qrcodeImage.createGraphics();
graphics2d.drawImage(logoBufferedImage, position, position, null);
graphics2d.dispose();
//3. 保存图片
qrcodeImage.flush();
ImageIO.write(qrcodeImage, FORMAT, destFile);
} catch(Exception e) {
logger.error("#generateLogoQrcode() - create qrcode failed, exception=[{}]", e);
throw BusinessException.newInstance("500", "create qrcode failed");
}
}
}二、解析二维码
@Component("qrcodeHandler")
public class QrcodeHandlerImpl implementsQrcodeHandler {
private static final Logger logger = LoggerFactory.getLogger(QrcodeHandlerImpl.class);
/**
* 解析二维码
*
* @param qrcode 待解析二维码文件
* @return 解析结果
*/
publicResult decode(File qrcode) {
try{
//1. 得到qrcode的bigmap数据
BufferedImage bufferedImage =ImageIO.read(qrcode);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(newBufferedImageLuminanceSource(bufferedImage)));
//2. 解码配置
Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
//3. 解析二维码
MultiFormatReader reader = newMultiFormatReader();
Result result =reader.decode(bitmap, hints);
logger.trace("#decode() - result=[{}], qrcode-barcodeFormat=[{}], qrcode-content=[{}]",
result.toString(), result.getBarcodeFormat(), result.getText());
returnresult;
} catch(Exception e) {
logger.error("#decode() - decode qrcode failed, exception=[{}]", e);
throw BusinessException.newInstance("500", "Decode qrcode failed");
}
}
}