1、POM

        <dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.5.0</version></dependency><dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.5.0</version></dependency>

2、普通二维码生成

工具类：

import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;import java.awt.image.BufferedImage;
import java.util.HashMap;
import java.util.Map;/*** 二维码生成工具类*/
public class QrCodeUtils {/*** 二维码尺寸*/private static final int QRCODE_SIZE = 300;/*** 生成二维码** @param url 二维码解析后的URL地址* @return 图片* @throws Exception*/public static BufferedImage getQrLogoCode(String url) throws Exception {Map<EncodeHintType, Object> hints = new HashMap<>(8);hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");hints.put(EncodeHintType.MARGIN, 1);BitMatrix bitMatrix = new MultiFormatWriter().encode(url, 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++) {// 设置黑白相见的颜色image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);}}return image;}
}

实现类：

@RestController
@RequestMapping("/test")
@Slf4j
public class Controller {/*** 生成二维码** @param response*/@GetMapping(value = "/qr")public void getQrCodeImage(HttpServletResponse response) {try (OutputStream os = response.getOutputStream()) {String url = "https://www.baidu.com";// 生成二维码对象BufferedImage image = QrCodeUtils.getQrLogoCode(url);//设置responseresponse.setContentType("image/png");// 输出jpg格式图片ImageIO.write(image, "jpg", os);} catch (Exception e) {e.printStackTrace();throw new RuntimeException("二维码生成失败!");}}
}

测试：
地址：http://localhost:10010/test/qr

3、Logo二维码生成

工具类：

import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
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.util.HashMap;
import java.util.Map;/*** 二维码生成工具类*/
public class QrCodeUtils {/*** 二维码尺寸*/private static final int QRCODE_SIZE = 300;/*** LOGO宽度*/private static final int LOGO_WIDTH = 80;/*** LOGO高度*/private static final int LOGO_HEIGHT = 80;/*** 生成二维码** @param url      二维码解析后的URL地址* @param logoPath logo地址 如果为空则表示不带logo* @return 图片* @throws Exception*/public static BufferedImage getQrLogoCode(String url, String logoPath) throws Exception {Map<EncodeHintType, Object> hints = new HashMap<>(8);hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");hints.put(EncodeHintType.MARGIN, 1);BitMatrix bitMatrix = new MultiFormatWriter().encode(url, 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++) {// 设置黑白相见的颜色image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);}}if (logoPath == null || "".equals(logoPath)) {return image;}// 插入图片QrCodeUtils.setLogoImage(image, logoPath);return image;}/*** 插入LOGO** @param source   二维码图片* @param logoPath LOGO图片地址* @throws IOException*/private static void setLogoImage(BufferedImage source, String logoPath) throws Exception {Image imageIo = ImageIO.read(new File(logoPath));int width = imageIo.getWidth(null);int height = imageIo.getHeight(null);// 设置图片尺寸，如果超过指定大小，则进行响应的缩小if (width > LOGO_WIDTH || height > LOGO_HEIGHT) {width = LOGO_WIDTH;height = LOGO_HEIGHT;}Image image = imageIo.getScaledInstance(width, height, Image.SCALE_SMOOTH);BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics g = tag.getGraphics();// 重新绘制Image对象g.drawImage(image, 0, 0, null);g.dispose();imageIo = image;// 插入LOGOGraphics2D graph = source.createGraphics();// 设置为居中int x = (QRCODE_SIZE - width) / 2;int y = (QRCODE_SIZE - height) / 2;graph.drawImage(imageIo, 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();}
}

实现类：

@RestController
@RequestMapping("/test")
@Slf4j
public class Controller {/*** 生成带logo的二维码** @param response*/@GetMapping(value = "/qr/logo")public void getQrLogoCodeImage(HttpServletResponse response) {try (OutputStream os = response.getOutputStream()) {String url = "https://www.baidu.com";String logoPath = "C:\\Users\\Desktop\\123.jpg";// 生成二维码对象BufferedImage image = QrCodeUtils.getQrLogoCode(url, logoPath);//设置responseresponse.setContentType("image/png");// 输出jpg格式图片ImageIO.write(image, "jpg", os);} catch (Exception e) {e.printStackTrace();throw new RuntimeException("二维码生成失败!");}}
}

测试：
地址：http://localhost:10010/test/qr

4、二维码解析

工具类：

import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;/*** 二维码生成工具类*/
public class QrCodeUtils {/*** 解析二维码** @param inputStream 二维码图片流* @return* @throws Exception*/public static String decodeQrImage(InputStream inputStream) throws Exception {BufferedImage image = ImageIO.read(inputStream);if (image == null) {return null;}BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));Map<DecodeHintType, Object> hints = new HashMap<>(2);hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");Result result = new MultiFormatReader().decode(bitmap, hints);return result.getText();}
}

实现类：

@RestController
@RequestMapping("/test")
@Slf4j
public class Controller {/*** 解析二维码图片，返回字符串** @param file*/@PostMapping(value = "/decode")public String decodeQrImage(@RequestParam("file") MultipartFile file) {try {InputStream inputStream = file.getInputStream();return QrCodeUtils.decodeQrImage(inputStream);} catch (Exception e) {e.printStackTrace();throw new RuntimeException("二维码解析失败!");}}
}

测试：
使用PostMan进行测试，将生成的二维码上传，可以看到成功返回了url数据；

5、完整代码

工具类：

import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
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.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;/*** 二维码生成工具类*/
public class QrCodeUtils {/*** 二维码尺寸*/private static final int QRCODE_SIZE = 300;/*** LOGO宽度*/private static final int LOGO_WIDTH = 80;/*** LOGO高度*/private static final int LOGO_HEIGHT = 80;/*** 生成二维码** @param url      二维码解析后的URL地址* @param logoPath logo地址 如果为空则表示不带logo* @return 图片* @throws Exception*/public static BufferedImage getQrLogoCode(String url, String logoPath) throws Exception {Map<EncodeHintType, Object> hints = new HashMap<>(8);hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");hints.put(EncodeHintType.MARGIN, 1);BitMatrix bitMatrix = new MultiFormatWriter().encode(url, 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++) {// 设置黑白相见的颜色image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);}}if (logoPath == null || "".equals(logoPath)) {return image;}// 插入图片QrCodeUtils.setLogoImage(image, logoPath);return image;}/*** 插入LOGO** @param source   二维码图片* @param logoPath LOGO图片地址* @throws IOException*/private static void setLogoImage(BufferedImage source, String logoPath) throws Exception {Image imageIo = ImageIO.read(new File(logoPath));int width = imageIo.getWidth(null);int height = imageIo.getHeight(null);// 设置图片尺寸，如果超过指定大小，则进行响应的缩小if (width > LOGO_WIDTH || height > LOGO_HEIGHT) {width = LOGO_WIDTH;height = LOGO_HEIGHT;}Image image = imageIo.getScaledInstance(width, height, Image.SCALE_SMOOTH);BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics g = tag.getGraphics();// 重新绘制Image对象g.drawImage(image, 0, 0, null);g.dispose();imageIo = image;// 插入LOGOGraphics2D graph = source.createGraphics();// 设置为居中int x = (QRCODE_SIZE - width) / 2;int y = (QRCODE_SIZE - height) / 2;graph.drawImage(imageIo, 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();}/*** 解析二维码** @param inputStream 二维码图片流* @return* @throws Exception*/public static String decodeQrImage(InputStream inputStream) throws Exception {BufferedImage image = ImageIO.read(inputStream);if (image == null) {return null;}BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));Map<DecodeHintType, Object> hints = new HashMap<>(2);hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");Result result = new MultiFormatReader().decode(bitmap, hints);return result.getText();}
}

实现类：

@RestController
@RequestMapping("/test")
@Slf4j
public class Controller {/*** 生成二维码** @param response*/@GetMapping(value = "/qr")public void getQrCodeImage(HttpServletResponse response) {try (OutputStream os = response.getOutputStream()) {String url = "https://www.baidu.com";// 生成二维码对象BufferedImage image = QrCodeUtils.getQrLogoCode(url, null);//设置responseresponse.setContentType("image/png");// 输出jpg格式图片ImageIO.write(image, "jpg", os);} catch (Exception e) {e.printStackTrace();throw new RuntimeException("二维码生成失败!");}}/*** 生成带logo的二维码** @param response*/@GetMapping(value = "/qr/logo")public void getQrLogoCodeImage(HttpServletResponse response) {try (OutputStream os = response.getOutputStream()) {String url = "https://www.baidu.com";String logoPath = "C:\\Users\\LiGezZ\\Desktop\\123.jpg";// 生成二维码对象BufferedImage image = QrCodeUtils.getQrLogoCode(url, logoPath);//设置responseresponse.setContentType("image/png");// 输出jpg格式图片ImageIO.write(image, "jpg", os);} catch (Exception e) {e.printStackTrace();throw new RuntimeException("二维码生成失败!");}}/*** 解析二维码图片，返回字符串** @param file*/@PostMapping(value = "/decode")public String decodeQrImage(@RequestParam("file") MultipartFile file) {try {InputStream inputStream = file.getInputStream();return QrCodeUtils.decodeQrImage(inputStream);} catch (Exception e) {e.printStackTrace();throw new RuntimeException("二维码解析失败!");}}
}

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Java生成、解析二维码方案以及代码实现

目录

1、POM

2、普通二维码生成

3、Logo二维码生成

4、二维码解析

5、完整代码

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