io.github.biezhi.wechat.utils.QRCodeUtils Maven / Gradle / Ivy
package io.github.biezhi.wechat.utils;
import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import javax.imageio.ImageIO;
import java.awt.*;
import java.io.File;
import java.io.FileInputStream;
import java.util.EnumMap;
import java.util.Map;
/**
* 二维码工具类
*
* @author biezhi
* @date 2018/1/18
*/
public class QRCodeUtils {
/**
* 显示二维码，Linux会显示在终端
*
* @param qrCode
* @param terminal
*/
public static void showQrCode(File qrCode, boolean terminal) {
if (!terminal) {
String os = System.getProperty("os.name").toLowerCase();
try {
if (os.contains("mac") || os.contains("win")) {
Desktop.getDesktop().open(qrCode);
return;
}
} catch (Exception e) {
e.printStackTrace();
}
}
Map hintMap = new EnumMap(EncodeHintType.class);
hintMap.put(EncodeHintType.CHARACTER_SET, "UTF-8");
// Now with zxing version 3.2.1 you could change border size (white border size to just 1)
// default = 4
hintMap.put(EncodeHintType.MARGIN, 1);
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
String qrContent = QRCodeUtils.readQRCode(qrCode, hintMap);
QRCodeWriter qrCodeWriter = new QRCodeWriter();
BitMatrix bitMatrix;
try {
bitMatrix = qrCodeWriter.encode(qrContent, BarcodeFormat.QR_CODE, 10, 10, hintMap);
System.out.println(toAscii(bitMatrix));
} catch (WriterException e) {
e.printStackTrace();
}
}
/**
* 将二维码输出为 ASCII
*
* @param bitMatrix
* @return
*/
private static String toAscii(BitMatrix bitMatrix) {
StringBuilder sb = new StringBuilder();
for (int rows = 0; rows < bitMatrix.getHeight(); rows++) {
for (int cols = 0; cols < bitMatrix.getWidth(); cols++) {
boolean x = bitMatrix.get(rows, cols);
if (!x) {
// white
sb.append("\033[47m \033[0m");
} else {
sb.append("\033[30m \033[0;39m");
}
}
sb.append("\n");
}
return sb.toString();
}
/**
* 读取二维码信息
*
* @param filePath
* @param hintMap
* @return
*/
private static String readQRCode(File filePath, Map hintMap) {
try {
BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(
new BufferedImageLuminanceSource(ImageIO.read(new FileInputStream(filePath)))));
Result qrCodeResult = new MultiFormatReader().decode(binaryBitmap, hintMap);
return qrCodeResult.getText();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}