Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $
You can buy this project and download/modify it how often you want.
com.github.xiaoyuge5201.qrcode.QrCodeUtil Maven / Gradle / Ivy
package com.github.xiaoyuge5201.qrcode;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageConfig;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
/**
* 二维码 工具类
*/
public class QrCodeUtil {
/**
* 生成带图片的二维码(到destImagePath指向的File)
*
* @param content 二维码的内容
* @param width 二维码的宽度(px)
* @param height 二维码的高度(px)
* @param embeddedImgPath 被镶嵌的图片的地址(null表示不带logo图片)
* @param destImagePath 生成二维码图片的地址
* @return 生成的二维码文件path
* @throws IOException IOException
* @throws WriterException WriterException
*/
public static String QREncode(String content, int width, int height, String embeddedImgPath, String destImagePath) throws IOException, WriterException {
File dest = getFile(destImagePath);
// 图像类型
String format = "jpg";
Map hints = new HashMap<>(4);
//设置UTF-8， 防止中文乱码
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
//设置二维码四周白色区域的大小
hints.put(EncodeHintType.MARGIN, 1);
//设置二维码的容错性
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
//画二维码，记得调用multiFormatWriter.encode()时最后要带上hints参数，不然上面设置无效
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
//开始画二维码
MatrixToImageWriter.writeToPath(bitMatrix, format, dest.toPath());
if (null != embeddedImgPath) {
MatrixToImageConfig matrixToImageConfig = new MatrixToImageConfig(0xFF000001, 0xFFFFFFFF);
BufferedImage bufferedImage = LogoMatrix(MatrixToImageWriter.toBufferedImage(bitMatrix, matrixToImageConfig), embeddedImgPath);
//输出带logo图片
ImageIO.write(bufferedImage, format, dest);
}
return destImagePath;
}
/**
* 生成带图片的二维码(到outputStream流)
*
* @param content 二维码的内容
* @param width 二维码的宽度(px)
* @param height 二维码的高度(px)
* @param embeddedImgPath 被镶嵌的图片的地址(null表示不带logo图片)
* @param outputStream 生成二维码图片的地址
* @return 生成的二维码文件path
* @throws IOException IOException
* @throws WriterException WriterException
*/
public static void QREncode(String content, int width, int height, String embeddedImgPath, OutputStream outputStream) throws IOException, WriterException {
// 图像类型
String format = "jpg";
Map hints = new HashMap<>(4);
//设置UTF-8， 防止中文乱码
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
//设置二维码四周白色区域的大小
hints.put(EncodeHintType.MARGIN, 1);
//设置二维码的容错性
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
//画二维码，记得调用multiFormatWriter.encode()时最后要带上hints参数，不然上面设置无效
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
//开始画二维码
MatrixToImageConfig matrixToImageConfig = new MatrixToImageConfig(0xFF000001, 0xFFFFFFFF);
BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(bitMatrix, matrixToImageConfig);
if (null != embeddedImgPath) {
bufferedImage = LogoMatrix(bufferedImage, embeddedImgPath);
}
//输出带logo图片
boolean result = ImageIO.write(bufferedImage, format, outputStream);
}
/**
* 识别二维码内容信息
*
* @param file 二维码图片文件
* @return 二维码内容
* @throws NotFoundException NotFoundException
* @throws IOException IOException
*/
public static String QRReader(File file) throws NotFoundException, IOException {
BufferedImage bufferedImage;
bufferedImage = ImageIO.read(file);
if (bufferedImage == null) {
return null;
}
String data = decodeQrCode(bufferedImage);
bufferedImage.flush();
return data;
}
/**
* 识别二维码内容信息
*
* @param is 二维码图片文件流
* @return 二维码内容
* @throws NotFoundException NotFoundException
* @throws IOException IOException
*/
public static String QRReader(InputStream is) throws NotFoundException, IOException {
BufferedImage bufferedImage;
bufferedImage = ImageIO.read(is);
if (bufferedImage == null) {
return null;
}
String data = decodeQrCode(bufferedImage);
bufferedImage.flush();
return data;
}
// ---------------------------------------------------以下为辅助方法、辅助类-----------------------------------------
/**
* 获取文件(顺带创建文件夹，如果需要的话)
*
* @param filePath 文件path
* @return 文件对象
*/
private static File getFile(String filePath) {
File file = new File(filePath);
if (!file.getParentFile().exists()) {
boolean result = file.getParentFile().mkdirs();
}
return file;
}
/**
* 二维码添加logo
*
* @param matrixImage 源二维码图片
* @param embeddedImgPath logo图片地址
* @return 返回带有logo的二维码图片
*/
private static BufferedImage LogoMatrix(BufferedImage matrixImage, String embeddedImgPath) throws IOException {
/**
* 读取二维码图片，并构建绘图对象
*/
Graphics2D g2 = matrixImage.createGraphics();
int matrixWidth = matrixImage.getWidth();
int matrixHeigh = matrixImage.getHeight();
/**
* 读取Logo图片
*/
File logoFile = getFile(embeddedImgPath);
BufferedImage logo = ImageIO.read(logoFile);
// 开始绘制图片
g2.drawImage(logo, matrixWidth / 5 * 2, matrixHeigh / 5 * 2, matrixWidth / 5, matrixHeigh / 5, null);
BasicStroke stroke = new BasicStroke(5, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
// 设置笔画对象
g2.setStroke(stroke);
// 指定弧度的圆角矩形
RoundRectangle2D.Float round = new RoundRectangle2D.Float(matrixWidth / 5 * 2, matrixHeigh / 5 * 2, matrixWidth / 5, matrixHeigh / 5, 20, 20);
g2.setColor(Color.white);
// 绘制圆弧矩形
g2.draw(round);
// 设置logo 有一道灰色边框
BasicStroke stroke2 = new BasicStroke(1, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
// 设置笔画对象
g2.setStroke(stroke2);
RoundRectangle2D.Float round2 = new RoundRectangle2D.Float(matrixWidth / 5 * 2 + 2, matrixHeigh / 5 * 2 + 2, matrixWidth / 5 - 4, matrixHeigh / 5 - 4, 20, 20);
g2.setColor(new Color(128, 128, 128));
// 绘制圆弧矩形
g2.draw(round2);
g2.dispose();
matrixImage.flush();
return matrixImage;
}
/**
* 识别二维码内容信息
* 二维码图片信息BufferedImage
*
* @param image
* @return 二维码内容
* @throws NotFoundException NotFoundException
*/
private static String decodeQrCode(BufferedImage image) throws NotFoundException {
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
HashMap hints = new HashMap<>(4);
hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
Result result = new MultiFormatReader().decode(bitmap, hints);
return result.getText();
}
}
