pom文件
com.google.zxing
core
3.3.3
com.google.zxing
javase
3.3.3
代码
package org.jeecg.common.util;
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.qrcode.decoder.ErrorCorrectionLevel;
import org.springframework.util.ResourceUtils;
import javax.imageio.ImageIO;
import javax.imageio.stream.ImageOutputStream;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;
/**
* @author caixr
* @title: QrCodeUtil
* @description: 二维码生成解析工具类
* @date 2022/3/2 13:22
*/
public class QrCodeUtil {
/**
* 编码格式,采用utf-8
*/
private static final String UNICODE = "utf-8";
/**
* 图片格式
*/
private static final String FORMAT = "JPG";
/**
* 图片格式
*/
private static final String BASE64_PRE_FIX = "data:image/JPG;base64,";
/**
* 二维码宽度,单位：像素pixels
*/
private static final int QRCODE_WIDTH = 300;
/**
* 二维码高度,单位：像素pixels
*/
private static final int QRCODE_HEIGHT = 300;
/**
* LOGO宽度,单位：像素pixels
*/
private static final int LOGO_WIDTH = 100;
/**
* LOGO高度,单位：像素pixels
*/
private static final int LOGO_HEIGHT = 100;
/**
* 生成二维码图片
*
* @param content 二维码内容
* @param logoPath 图片地址
* @param needCompress 是否压缩
* @return
* @throws Exception
*/
private static BufferedImage createImage(String content, String logoPath, boolean needCompress) throws Exception {
Hashtable hints = new Hashtable<>();
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
hints.put(EncodeHintType.CHARACTER_SET, UNICODE);
hints.put(EncodeHintType.MARGIN, 1);
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, QRCODE_WIDTH, QRCODE_HEIGHT,
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);
}
}
if (logoPath == null || "".equals(logoPath)) {
return image;
}
// 插入图片
insertImage(image, logoPath, needCompress);
return image;
}
/**
* 插入LOGO
*
* @param source 二维码图片
* @param logoPath LOGO图片地址
* @param needCompress 是否压缩
* @throws Exception
*/
private static void insertImage(BufferedImage source, String logoPath, boolean needCompress) throws Exception {
File file = new File(logoPath);
if (!file.exists()) {
throw new Exception("logo file not found.");
}
Image src = ImageIO.read(new File(logoPath));
int width = src.getWidth(null);
int height = src.getHeight(null);
// 压缩LOGO
if (needCompress) {
if (width > LOGO_WIDTH) {
width = LOGO_WIDTH;
}
if (height > LOGO_HEIGHT) {
height = LOGO_HEIGHT;
}
Image image = src.getScaledInstance(width, height, Image.SCALE_SMOOTH);
BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = tag.getGraphics();
// 绘制缩小后的图
g.drawImage(image, 0, 0, null);
g.dispose();
src = image;
}
// 插入LOGO
Graphics2D graph = source.createGraphics();
int x = (QRCODE_WIDTH - width) / 2;
int y = (QRCODE_HEIGHT - height) / 2;
graph.drawImage(src, x, y, width, height, null);
Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
graph.setStroke(new BasicStroke(3f));
graph.draw(shape);
graph.dispose();
}
/**
* 生成二维码(内嵌LOGO)
* 调用者指定二维码文件名
*
* @param content 二维码的内容
* @param logoPath 中间图片地址
* @param destPath 存储路径
* @param fileName 文件名称
* @param needCompress 是否压缩
* @return
* @throws Exception
*/
public static String encode(String content, String logoPath, String destPath, String fileName, boolean needCompress) throws Exception {
BufferedImage image = createImage(content, logoPath, needCompress);
makeDirs(destPath);
//文件名称通过传递
fileName = fileName.substring(0, fileName.indexOf(".") > 0 ? fileName.indexOf(".") : fileName.length())
+ "." + FORMAT.toLowerCase();
ImageIO.write(image, FORMAT, new File(destPath + "/" + fileName));
return fileName;
}
/**
* 生成二维码绘制到浏览器
*
* @param response 响应头
* @param content 二维码的内容
*/
public static void encode(HttpServletResponse response, String content) {
ServletOutputStream out;
try {
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, QRCODE_WIDTH, QRCODE_HEIGHT, config);
MatrixToImageWriter.writeToStream(bitMatrix, FORMAT, out);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 生成二维码绘制到浏览器(内嵌logo)
*
* @param response 响应头
* @param content 二维码的内容
*/
public static void encodeWithLogo(HttpServletResponse response, String content) {
response.setContentType("image/jpg");
try (OutputStream out = response.getOutputStream()) {
String logoPath = ResourceUtils.getURL("classpath:").getPath() + "/static/logo/logo.png";
BufferedImage image = createImage(content, logoPath, true);
ImageIO.write(image, FORMAT, out);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 生成base64二维码
*
* @param content 二维码的内容
*/
public static String codeForBase64(String content) {
String resultImage;
try {
String logoPath = ResourceUtils.getURL("classpath:").getPath() + "/static/logo/logo.png";
BufferedImage image = createImage(content, logoPath, true);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
ImageIO.write(image, FORMAT, stream);
resultImage = BASE64_PRE_FIX + new String(Base64.getEncoder().encode(stream.toByteArray()));
return resultImage;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 生成二维码并下载(内嵌logo)
*
* @param response 响应头
* @param content 二维码的内容
*/
public static void downLoadLogo(HttpServletResponse response, String content, String userName) {
try {
String logoPath = ResourceUtils.getURL("classpath:").getPath() + "/static/logo/logo.png";
BufferedImage image = createImage(content, logoPath, true);
//BufferedImage 转 InputStream
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ImageOutputStream imageOutput = ImageIO.createImageOutputStream(byteArrayOutputStream);
ImageIO.write(image, FORMAT, imageOutput);
InputStream inputStream = new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
long length = imageOutput.length();
response.setContentType("application/x-msdownload");
response.setContentLength((int) length);
String fileName = userName + ".jpg";
response.setHeader("Content-Disposition", "attachment;filename=" + new String(fileName.getBytes("gbk"), StandardCharsets.ISO_8859_1));
//输出流
byte[] bytes = new byte[1024];
OutputStream outputStream = response.getOutputStream();
long count = 0;
while (count < length) {
int len = inputStream.read(bytes, 0, 1024);
count += len;
outputStream.write(bytes, 0, len);
}
outputStream.flush();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 创建文件夹， makeDirs会自动创建多层目录
*
* @param destPath
*/
public static void makeDirs(String destPath) {
File file = new File(destPath);
if (!file.exists() && !file.isDirectory()) {
file.mkdirs();
}
}
/**
* 解析二维码
*
* @param path 二维码图片路径
* @return String 二维码内容
* @throws Exception
*/
public static String decode(String path) throws Exception {
File file = new File(path);
BufferedImage image = ImageIO.read(file);
if (image == null) {
return null;
}
BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
Hashtable hints = new Hashtable<>();
hints.put(DecodeHintType.CHARACTER_SET, UNICODE);
result = new MultiFormatReader().decode(bitmap, hints);
return result.getText();
}
}