package com.zy.utils;
|
|
import com.google.zxing.BarcodeFormat;
|
import com.google.zxing.EncodeHintType;
|
import com.google.zxing.MultiFormatWriter;
|
import com.google.zxing.WriterException;
|
import com.google.zxing.common.BitMatrix;
|
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
|
|
import javax.imageio.ImageIO;
|
import java.awt.image.BufferedImage;
|
import java.io.*;
|
import java.util.concurrent.ConcurrentHashMap;
|
|
/**
|
* Created by vincent on 2020-03-23
|
*/
|
public class QrCode {
|
|
private static final String CHARSET = "utf-8";
|
private static final String FORMAT_NAME = "JPG";
|
// 二维码尺寸
|
private static final int QRCODE_SIZE = 60;
|
|
|
public static BufferedImage createImg(String content) throws WriterException {
|
ConcurrentHashMap hints = new ConcurrentHashMap();
|
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
|
hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
|
hints.put(EncodeHintType.MARGIN, 1);
|
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
|
int width = bitMatrix.getWidth();
|
int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
|
}
|
}
|
for (int x = 0; x < width; x++) {
|
for (int y = 0; y < height; y++) {
|
image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
|
}
|
}
|
return image;
|
}
|
|
private static InputStream convert(BufferedImage image){
|
ByteArrayOutputStream os = new ByteArrayOutputStream();
|
try {
|
ImageIO.write(image, FORMAT_NAME, os);
|
return new ByteArrayInputStream(os.toByteArray());
|
} catch (IOException e) {
|
System.err.println(e);
|
}
|
return null;
|
}
|
|
public static void inputstreamtofile(InputStream ins, File file) {
|
try {
|
OutputStream os = new FileOutputStream(file);
|
int bytesRead = 0;
|
byte[] buffer = new byte[8192];
|
while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
|
os.write(buffer, 0, bytesRead);
|
}
|
os.close();
|
ins.close();
|
} catch (Exception e) {
|
e.printStackTrace();
|
}
|
}
|
|
public static void main(String[] args) throws WriterException {
|
String text = "1234567890";
|
String destPath = "/Users/vincent/Desktop/jam.jpg";
|
BufferedImage img = QrCode.createImg(text);
|
InputStream inputStream = convert(img);
|
inputstreamtofile(inputStream, new File(destPath));
|
|
// BufferedImage img = QrCode.createImg(String.valueOf(id));
|
// if (!ImageIO.write(img, "jpg", response.getOutputStream())) {
|
// throw new IOException("Could not write an image of format jpg");
|
// }
|
// response.getOutputStream().flush();
|
// response.getOutputStream().close();
|
}
|
|
|
|
}
|