cn.acyou.leo.framework.barcode.BarCodeUtil Maven / Gradle / Ivy
package cn.acyou.leo.framework.barcode;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.pdf417.PDF417Writer;
import com.google.zxing.qrcode.QRCodeReader;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
/**
* @author youfang
* @version [1.0.0, 2020-8-13 下午 11:06]
**/
public class BarCodeUtil {
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
/**
* 默认图片格式
*/
private static final String DEFAULT_IMAGE_FORMAT = "PNG";
// LOGO图片设置
private static final int IMAGE_WIDTH = 80;
private static final int IMAGE_HEIGHT = 80;
private static final int IMAGE_HALF_WIDTH = IMAGE_WIDTH / 2;
private static final int FRAME_WIDTH = 2;
/**
* 生成包含字符串信息的二维码图片
*
* @param outputStream 文件输出流路径
* @param content 二维码携带的内容信息
* @param qrCodeSize 二维码图片大小
* @throws WriterException 异常
* @throws IOException 异常
*/
public static void createQrCode(OutputStream outputStream, String content, int qrCodeSize) throws WriterException, IOException {
BufferedImage image = createImage(content, qrCodeSize);
ImageIO.write(image, DEFAULT_IMAGE_FORMAT, outputStream);
}
/**
* 生成包含字符串信息的二维码图片
*
* @param outputStream 文件输出流路径
* @param content 二维码携带的内容信息
* @param qrCodeSize 二维码图片大小
* @throws WriterException 异常
* @throws IOException 异常
*/
public static void createLogoQrCode(OutputStream outputStream, String logoImagePath, String content, int qrCodeSize) throws WriterException, IOException {
BufferedImage image = createLogoImage(content, qrCodeSize, logoImagePath);
ImageIO.write(image, DEFAULT_IMAGE_FORMAT, outputStream);
}
/**
* 创建带有Logo的二维码
*
* @param content 内容
* @param qrCodeSize 二维码的大小
* @param srcImagePath Logo图像路径
* @return {@link BufferedImage}* @throws WriterException 异常
* @throws IOException ioException
*/
private static BufferedImage createLogoImage(String content, int qrCodeSize, String srcImagePath) throws WriterException,
IOException {
// 读取源图像
BufferedImage scaleImage = scale(srcImagePath, IMAGE_WIDTH, IMAGE_HEIGHT, true);
int[][] srcPixels = new int[IMAGE_WIDTH][IMAGE_HEIGHT];
for (int i = 0; i < scaleImage.getWidth(); i++) {
for (int j = 0; j < scaleImage.getHeight(); j++) {
srcPixels[i][j] = scaleImage.getRGB(i, j);
}
}
Map hint = new HashMap<>();
hint.put(EncodeHintType.CHARACTER_SET, "utf-8");
hint.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
// 生成二维码
MultiFormatWriter mutiWriter = new MultiFormatWriter();
BitMatrix matrix = mutiWriter.encode(content, BarcodeFormat.QR_CODE,
qrCodeSize, qrCodeSize, hint);
// 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[qrCodeSize * qrCodeSize];
for (int y = 0; y < matrix.getHeight(); y++) {
for (int x = 0; x < matrix.getWidth(); x++) {
boolean adjust = (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW - IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW + IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
- IMAGE_HALF_WIDTH + FRAME_WIDTH)
|| (x > halfW - IMAGE_HALF_WIDTH - FRAME_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH + FRAME_WIDTH
&& y > halfH + IMAGE_HALF_WIDTH - FRAME_WIDTH && y < halfH
+ IMAGE_HALF_WIDTH + FRAME_WIDTH);
// 读取图片
if (x > halfW - IMAGE_HALF_WIDTH
&& x < halfW + IMAGE_HALF_WIDTH
&& y > halfH - IMAGE_HALF_WIDTH
&& y < halfH + IMAGE_HALF_WIDTH) {
pixels[y * qrCodeSize + x] = srcPixels[x - halfW
+ IMAGE_HALF_WIDTH][y - halfH + IMAGE_HALF_WIDTH];
}
// 在图片四周形成边框
else if (adjust) {
pixels[y * qrCodeSize + x] = 0xfffffff;
} else {
// 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 * qrCodeSize + x] = matrix.get(x, y) ? 0xff000000
: 0xfffffff;
}
}
}
BufferedImage image = new BufferedImage(qrCodeSize, qrCodeSize, BufferedImage.TYPE_INT_RGB);
image.getRaster().setDataElements(0, 0, qrCodeSize, qrCodeSize, pixels);
return image;
}
/**
* 把传入的原始图像按高度和宽度进行缩放，生成符合要求的图标
*
* @param srcImageFile 源文件地址
* @param height 目标高度
* @param width 目标宽度
* @param hasFiller 比例不对时是否需要补白：true为补白; false为不补白;
* @throws IOException ex
*/
private static BufferedImage scale(String srcImageFile, int height, int width, boolean hasFiller) throws IOException {
// 缩放比例
double ratio;
File file = new File(srcImageFile);
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);
}
// 补白
if (hasFiller) {
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;
}
/**
* 生成包含字符串信息的二维码图片
*
* @param outputStream 文件输出流路径
* @param content 二维码携带信息
* @throws WriterException 异常
* @throws IOException 异常
*/
public static boolean createPdf417Code(OutputStream outputStream, String content) throws WriterException, IOException {
PDF417Writer pdf417Writer = new PDF417Writer();
Hashtable hints = new Hashtable<>();
hints.put(EncodeHintType.MARGIN, "50");
BitMatrix bitMatrix = pdf417Writer.encode(content, BarcodeFormat.PDF_417, 1000, 300, hints);
BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);
pressText(content, image);
return ImageIO.write(image, DEFAULT_IMAGE_FORMAT, outputStream);
}
/**
* 读二维码携带的信息
*
* @param inputStream 输入流
* @return {@link String}
* @throws Exception 异常
*/
public static String readQrCode(InputStream inputStream) throws Exception {
BufferedImage image = ImageIO.read(inputStream);
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
QRCodeReader reader = new QRCodeReader();
Result result = reader.decode(bitmap);
return result.getText();
}
/**
* 创建图像
*
* @param content 内容
* @param qrCodeSize 二维码的大小
* @return {@link BufferedImage}* @throws WriterException 作家例外
*/
private static BufferedImage createImage(String content, int qrCodeSize) throws WriterException {
Hashtable hints = new Hashtable<>();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.MARGIN, 1);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, qrCodeSize, qrCodeSize, hints);
return MatrixToImageWriter.toBufferedImage(bitMatrix);
}
/**
* 给二维码图片加上文字
*/
public static void pressText(String pressText, BufferedImage image) {
pressText = new String(pressText.getBytes(), StandardCharsets.UTF_8);
Graphics g = image.createGraphics();
g.setColor(Color.BLACK);
Font font = new Font(Font.SERIF, Font.PLAIN, 50);
FontMetrics metrics = g.getFontMetrics(font);
// 文字在图片中的坐标 这里设置在中间
int startX = (image.getWidth() - metrics.stringWidth(pressText)) / 2;
//文字所在的Y轴开始坐标（20：需要动态调整设置的值）
int startY = image.getHeight() - 10;
g.setFont(font);
g.drawString(pressText, startX, startY);
g.dispose();
}
}
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