SpringBoot (批量)生成二维码工具类多种方法示例

一、引入依赖

 <dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.4.1</version>
</dependency><dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.4.1</version>
</dependency>

二、按照字符串生成二维码

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.HashMap;
import java.util.Map;public class QRCodeGeneratorByString {public static void main(String[] args) {String filePath = "D:\\QRcode/qrcode";int width = 300;int height = 300;try {Map<EncodeHintType, Object> hintMap = new HashMap<>();hintMap.put(EncodeHintType.CHARACTER_SET, "UTF-8");hintMap.put(EncodeHintType.MARGIN, 1);hintMap.put(EncodeHintType.ERROR_CORRECTION, com.google.zxing.qrcode.decoder.ErrorCorrectionLevel.L);// 设置背景色和前景色Color backgroundColor = Color.WHITE;Color foregroundColor = Color.BLACK;for (int i = 10; i <= 19; i++) {// 生成类似 Fboard001 的字符串String content = "Fboard" + String.format("%03d", i);String fileFullPath = filePath + i + ".png";BitMatrix matrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hintMap);BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);for (int x = 0; x < width; x++) {for (int y = 0; y < height; y++) {int color = matrix.get(x, y) ? foregroundColor.getRGB() : backgroundColor.getRGB();image.setRGB(x, y, color);}}File qrCodeFile = new File(fileFullPath);ImageIO.write(image, "png", qrCodeFile);System.out.println("QR Code for " + content + " generated successfully!");}} catch (Exception e) {e.printStackTrace();}}
}

三、按照Json文件生成二维码

方法一（将json字符串直接传入）

public class QRCodeGeneratorByOne {public static void main(String[] args) {String json = "{\"name\":\"John\", \"age\":30, \"city\":\"New York\"}";String filePath = "D:\\QRcode/qrcode.png";int width = 300;int height = 300;try {Map<EncodeHintType, Object> hintMap = new HashMap<>();hintMap.put(EncodeHintType.CHARACTER_SET, "UTF-8");hintMap.put(EncodeHintType.MARGIN, 1);hintMap.put(EncodeHintType.ERROR_CORRECTION, com.google.zxing.qrcode.decoder.ErrorCorrectionLevel.L);// 设置背景色和前景色Color backgroundColor = Color.WHITE;Color foregroundColor = Color.BLACK;BitMatrix matrix = new MultiFormatWriter().encode(json, BarcodeFormat.QR_CODE, width, height, hintMap);BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);for (int x = 0; x < width; x++) {for (int y = 0; y < height; y++) {int color = matrix.get(x, y) ? foregroundColor.getRGB() : backgroundColor.getRGB();image.setRGB(x, y, color);}}File qrCodeFile = new File(filePath);ImageIO.write(image, "png", qrCodeFile);System.out.println("QR Code generated successfully!");} catch (Exception e) {e.printStackTrace();}}
}

方法二（将json文件导入方法）

如果，希望二维码中包含更多的信息，使用字符串已经无法满足的情况下，可以尝试使用json文件先根据 json文件，创建对应的对象：

@Data
@Getter
@Setter
public class JsonData {private String name;private int age;private String city;
}

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;public class QRCodeGenerator {public static void main(String[] args) {String jsonFilePath = "D:\\QRcode/file.json";generateQRCodeFromJsonFile(jsonFilePath);}public static void generateQRCodeFromJsonFile(String jsonFilePath) {try {// 读取JSON文件File file = new File(jsonFilePath);ObjectMapper objectMapper = new ObjectMapper();JsonData[] jsonDataArray = objectMapper.readValue(file, JsonData[].class);// 逐个解析JSON并生成二维码for (JsonData jsonData : jsonDataArray) {String jsonString = objectMapper.writeValueAsString(jsonData);// 生成二维码图片String qrCodeImagePath = generateQRCodeImage(jsonString);System.out.println("Generated QR Code for JSON: " + jsonString);System.out.println("QR Code image path: " + qrCodeImagePath);}} catch (IOException e) {e.printStackTrace();}}public static String generateQRCodeImage(String data) {int width = 300;int height = 300;String format = "png";Map<EncodeHintType, Object> hints = new HashMap<>();hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);//加上三位随机数Random random = new Random();int end3 = random.nextInt(999);try {BitMatrix bitMatrix = new MultiFormatWriter().encode(data, BarcodeFormat.QR_CODE, width, height, hints);File qrCodeFile = new File("D:\\QRcode/qrcode"+end3+".png");MatrixToImageWriter.writeToFile(bitMatrix, format, qrCodeFile);return qrCodeFile.getAbsolutePath();} catch (Exception e) {e.printStackTrace();}return null;}
}