com.hframework.common.util.file.QRCodeUtils Maven / Gradle / Ivy
package com.hframework.common.util.file;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import sun.misc.BASE64Encoder;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.HashMap;
import java.util.Map;
public final class QRCodeUtils {
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
private static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
}
}
return image;
}
private static void writeToFile(BitMatrix matrix, String format, File file)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, file)) {
throw new IOException("Could not write an image of format " + format + " to " + file);
}
}
private static void writeToStream(BitMatrix matrix, String format, OutputStream stream)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format " + format);
}
}
private static String fileInputStream(String path) throws IOException {
File file = new File(path);
if (!file.exists() || file.isDirectory())
throw new FileNotFoundException();
FileInputStream fileInputStream = new FileInputStream(file);
byte[] buf = new byte[1024];
StringBuffer sb = new StringBuffer();
while ((fileInputStream.read(buf)) != -1) {
sb.append(new String(buf));
buf = new byte[1024];//重新生成，避免和上次读取的数据重复
}
return sb.toString();
}
public static String createQRCode(String path,String fileName, String content) throws Throwable {
FileUtils.createDir(path);
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
Map map = new HashMap();
map.put(EncodeHintType.CHARACTER_SET, "UTF-8");
BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, 300, 300, map);
File file = new File(path, fileName + ".jpg");//以时间戳命名
QRCodeUtils.writeToFile(bitMatrix, "jpg", file);
BufferedImage bufferedImage;
BASE64Encoder encoder = new BASE64Encoder();
try {
bufferedImage = ImageIO.read(file);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageIO.write(bufferedImage, "jpg", byteArrayOutputStream);
byte[] bytes = byteArrayOutputStream.toByteArray();
//System.out.println(encoder.encodeBuffer(bytes).trim());
return encoder.encodeBuffer(bytes).trim();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}