public class QRCodeUtil {
public static BufferedImage encodeQRcode(String content, int width, int height, String logoPath, Boolean isColor) {
try {
// 生成二维码
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");// 编码
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);// 最高容错级别
hints.put(EncodeHintType.MARGIN, 0);// 边框留白最小(无法精准控制)
MultiFormatWriter mutiWriter = new MultiFormatWriter();
BitMatrix matrix = mutiWriter.encode(content,BarcodeFormat.QR_CODE, width, height, hints);
// 根据左上角定位方块坐标，确定左上角定位方块范围
int[] topLeftPoint = matrix.getTopLeftOnBit();
int leftTopX = topLeftPoint[0];// 左上角方块左上角X坐标
int leftTopY = topLeftPoint[1];// 左上角方块左上角Y坐标
int rightBottomX = 0;// 左上角方块右下角X坐标
int rightBottomY = 0;// 左上角方块右下角Y坐标
for (int x = topLeftPoint[0]; x < matrix.getWidth(); x++) {
if (!matrix.get(x, topLeftPoint[1])) {
rightBottomX = x;
break;
}
}
for (int y = topLeftPoint[1]; y < matrix.getHeight(); y++) {
if (!matrix.get(topLeftPoint[0], y)) {
rightBottomY = y;
break;
}
}
// LOGO生成
int logoWidth = rightBottomX - leftTopX;// LOGO宽度
int logoHeight = rightBottomY - leftTopY;// LOGO高度
int logoHalfWidth = logoWidth / 2;// LOGO宽度一半
int logoframeWidth = 1;// LOGO边框宽度
BufferedImage logoImage = genLogo(logoPath, logoWidth, logoHeight,
true);
int[][] logoPixels = new int[logoWidth][logoHeight];
if (logoImage != null) {
for (int i = 0; i < logoImage.getWidth(); i++) {
for (int j = 0; j < logoImage.getHeight(); j++) {
logoPixels[i][j] = logoImage.getRGB(i, j);
}
}
}
// 二维矩阵转为一维像素数组
int halfW = matrix.getWidth() / 2;
int halfH = matrix.getHeight() / 2;
int[] pixels = new int[width * height];
for (int y = 0; y < matrix.getHeight(); y++) {
for (int x = 0; x < matrix.getWidth(); x++) {
if (x > 0 && x < rightBottomX && y > 0 && y < rightBottomY) {// 左上角定位方块颜色,根据自己需要调整颜色范围和空白填充颜色
Color color = new Color(0, 0, 0);// 黑色
if (isColor == null || isColor) {// 彩色二维码
color = new Color(231, 144, 56);// 此处颜色固化，如果需要可扩展
}
int colorInt = color.getRGB();
pixels[y * width + x] = matrix.get(x, y) ? colorInt
: 16777215;
} else if (logoImage != null && x > halfW - logoHalfWidth
&& x < halfW + logoHalfWidth
&& y > halfH - logoHalfWidth
&& y < halfH + logoHalfWidth) {// 添加LOGO(如果存在)
pixels[y * width + x] = logoPixels[x - halfW
+ logoHalfWidth][y - halfH + logoHalfWidth];
} else if (logoImage != null
&& ((x > halfW - logoHalfWidth - logoframeWidth
&& x < halfW - logoHalfWidth
+ logoframeWidth
&& y > halfH - logoHalfWidth
- logoframeWidth && y < halfH
+ logoHalfWidth + logoframeWidth)
|| (x > halfW + logoHalfWidth
- logoframeWidth
&& x < halfW + logoHalfWidth
+ logoframeWidth
&& y > halfH - logoHalfWidth
- logoframeWidth && y < halfH
+ logoHalfWidth + logoframeWidth)
|| (x > halfW - logoHalfWidth
- logoframeWidth
&& x < halfW + logoHalfWidth
+ logoframeWidth
&& y > halfH - logoHalfWidth
- logoframeWidth && y < halfH
- logoHalfWidth + logoframeWidth) || (x > halfW
- logoHalfWidth - logoframeWidth
&& x < halfW + logoHalfWidth
+ logoframeWidth
&& y > halfH + logoHalfWidth
- logoframeWidth && y < halfH
+ logoHalfWidth + logoframeWidth))) {// 添加LOGO四周边框(如果存在)
Color color = new Color(0, 0, 0);// 黑色
if (isColor == null || isColor) {// 彩色二维码
// 此处固化为渐变颜色，如有需要可扩展
int R = (int) (50 - (50.0 - 13.0)
/ matrix.getHeight() * (y + 1));
int G = (int) (165 - (165.0 - 72.0)
/ matrix.getHeight() * (y + 1));
int B = (int) (162 - (162.0 - 107.0)
/ matrix.getHeight() * (y + 1));
color = new Color(R, G, B);
}
int colorInt = color.getRGB();
pixels[y * width + x] = colorInt;
} else {// 其他部分二维码颜色
Color color = new Color(0, 0, 0);// 黑色
if (isColor == null || isColor) {// 彩色二维码
// 此处固化为渐变颜色，如有需要可扩展
int R = (int) (50 - (50.0 - 13.0)
/ matrix.getHeight() * (y + 1));
int G = (int) (165 - (165.0 - 72.0)
/ matrix.getHeight() * (y + 1));
int B = (int) (162 - (162.0 - 107.0)
/ matrix.getHeight() * (y + 1));
color = new Color(R, G, B);
}
int colorInt = color.getRGB();
// 此处可以修改二维码的颜色，可以分别制定二维码和背景的颜色；
pixels[y * width + x] = matrix.get(x, y) ? colorInt
: 16777215;
}
}
}
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
image.getRaster().setDataElements(0, 0, width, height, pixels);
return image;
} catch (WriterException e) {
return null;
}
}
public static Map decode(String filePath) {
try {
if (filePath == null || filePath.equals("")) {
return null;
}
File file = new File(filePath);
if (!file.exists()) {
return null;
}
BufferedImage image = ImageIO.read(new File(filePath));
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
Binarizer binarizer = new HybridBinarizer(source);
BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
Map hints = new HashMap();
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码
Map resultMap = new HashMap();
resultMap.put("encode", result.getBarcodeFormat().name());
resultMap.put("text", result.getText());
return resultMap;
} catch (Exception e) {
return null;
}
}
private static BufferedImage genLogo(String logoPath, int height, int width, boolean hasFiller) {
if (logoPath == null || logoPath.equals("")) {
return null;
}
try {
double ratio = 0.0; // 缩放比例
File file = new File(logoPath);
BufferedImage srcImage = ImageIO.read(file);
Image destImage = srcImage.getScaledInstance(width, height,
BufferedImage.SCALE_SMOOTH);
// 计算比例
if ((srcImage.getHeight() > height)
|| (srcImage.getWidth() > width)) {
if (srcImage.getHeight() > srcImage.getWidth()) {
ratio = (new Integer(height)).doublevalue()
/ srcImage.getHeight();
} else {
ratio = (new Integer(width)).doublevalue()
/ srcImage.getWidth();
}
AffineTransformOp op = new AffineTransformOp(
AffineTransform.getScaleInstance(ratio, ratio), null);
destImage = op.filter(srcImage, null);
}
if (hasFiller) {// 补白
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
Graphics2D graphic = image.createGraphics();
graphic.setColor(Color.white);
graphic.fillRect(0, 0, width, height);
if (width == destImage.getWidth(null)) {
graphic.drawImage(destImage, 0,
(height - destImage.getHeight(null)) / 2,
destImage.getWidth(null),
destImage.getHeight(null), Color.white, null);
} else {
graphic.drawImage(destImage,
(width - destImage.getWidth(null)) / 2, 0,
destImage.getWidth(null),
destImage.getHeight(null), Color.white, null);
}
graphic.dispose();
destImage = image;
}
return (BufferedImage) destImage;
} catch (IOException e) {
return null;
}
}
public static String encode(String content, int width, int height, String logoPath, Boolean isColor,String path) throws Exception {
BufferedImage image = encodeQRcode(content, width,height, logoPath, isColor);
File imgFile = new File(path);
ImageIO.write(image, "jpg", imgFile);// 存储
return imgFile.getAbsolutePath();
}
public static void createQRCode(int width, int height, String content, HttpServletResponse response) throws Exception {
String format = "png";
ServletOutputStream out = response.getOutputStream();
Map config = new HashMap<>();
config.put(EncodeHintType.CHARACTER_SET,"UTF-8");
config.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
config.put(EncodeHintType.MARGIN, 0);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE,width,height,config);
MatrixToImageWriter.writeToStream(bitMatrix,format,out);
System.out.println("二维码生成完毕，已经输出到页面中。");
}
public static void createQRCodeImage(int width, int height, String json, String fileName) throws Exception {
String format = "png";
Map config = new HashMap<>();
config.put(EncodeHintType.CHARACTER_SET,"UTF-8");
config.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
config.put(EncodeHintType.MARGIN, 0);
BitMatrix bitMatrix = new MultiFormatWriter().encode(json, BarcodeFormat.QR_CODE,width,height,config);
File file = new File(fileName);
if (!file.exists()) {
file.createNewFile();
}
FileOutputStream outputStream = new FileOutputStream(file);
MatrixToImageWriter.writeToStream(bitMatrix,format,outputStream);
System.out.println("二维码生成完毕:"+ fileName);
}
//获得图片的base64码
public static String getImagebase(String src) {
if(src==null||src==""){
return "";
}
File file = new File(getRequest().getRealPath("/")+src.replace(getRequest().getContextPath(), ""));
if(!file.exists()) {
return "";
}
InputStream in = null;
byte[] data = null;
try {
in = new FileInputStream(file);
} catch (FileNotFoundException e1) {
e1.printStackTrace();
}
try {
data = new byte[in.available()];
in.read(data);
in.close();
} catch (IOException e) {
e.printStackTrace();
}
base64Encoder encoder = new base64Encoder();
return encoder.encode(data);
}
public static void main(String[] args) throws Exception {
BufferedImage image = QRCodeUtil.encodeQRcode("OO", 512, 512,"", false);// 生成二维码
ImageIO.write(image, "jpg", new File("E:\test.jpg"));// 存储
System.out.println(decode("E:\test.jpg"));// 解析
}
}
