本文主要是介绍谷歌QR生成，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
main代码:
public class Main {//默认请求链接private static String _BASE_RQ_URL_ = "https://wechat.bf-tech.cn?scanid=*scan_id*&port=*port*";//默认文件夹格式private static String _LOCAL_DIR_URL = "D:\\QR_img\\*device_id*";public static final String Reset = "\u001B[0m"; // 重置所有属性public static final String Black = "\u001B[30m"; // 黑色字体public static final String Rad = "\u001B[31m"; // 红色字体public static final String Green = "\u001B[32m"; // 绿色字体public static final String Yellow = "\u001B[33m";// 黄色字体public static final String Blue = "\u001B[34m"; // 蓝色字体public static final String Purple = "\u001B[35m";// 紫色字体public static final String Cyan = "\u001B[36m"; // 青色字体//二维码类型，枚举类private static final BarcodeFormat CODE_TYPE = BarcodeFormat.QR_CODE;//二维码宽度，单位像素private static final int CODE_WIDTH = 400;//二维码高度，单位像素private static final int CODE_HEIGHT = 400;//二维码前景色，0x000000表示黑色private static final int FRONT_COLOR = 0x000000;//二维码背景色，0xFFFFFF表示白色private static final int BACKGROUND_COLOR = 0xFFFFFF;public static void main(String[] args) {Scanner userScanner = new Scanner(System.in);String userInput = null;File fatherDir = new File("D:\\QR_img");if (!fatherDir.exists() && !fatherDir.isDirectory()) {System.out.println("Init Folder...");fatherDir.mkdir();System.out.println(Green + "Folder created successfully" + Reset);}while (true) {System.out.println("请输入设备编号(输入q退出程序)");userInput = userScanner.next();if ("q".equals(userInput))break;//数字检测try {Double num1 = Double.parseDouble(userInput);} catch (Exception e) {throw new RuntimeException("请输入正确格式id");}//创建对应文件夹String childDirUrl = _LOCAL_DIR_URL.replace("*device_id*", userInput);File childDir = new File(childDirUrl);if (!childDir.exists() && !childDir.isDirectory()) {System.out.println("Init child folder...");childDir.mkdir();System.out.println(Green + "Child folder created successfully" + Reset);}for (int i = 1; i <= 10; i++) {//设置文件夹名称String fileName = userInput + new Date().getTime() + i + ".png";//设置requestURLString requestUrl = _BASE_RQ_URL_.replace("*scan_id*", userInput).replace("*port*", "" + i).trim();//生成二维码try {BufferedImage bufferedImage = getBufferedImage(requestUrl);File codeImgFile = new File(childDirUrl, fileName);ImageIO.write(bufferedImage, "png", codeImgFile);} catch (Exception e) {e.printStackTrace();}}System.out.println("生成完毕!");}System.out.println("程序关闭!");}/*** 核心代码，生成二维码** @param content 二维码内容* @return BufferedImage buff流* @throws WriterException*/private static BufferedImage getBufferedImage(String content) throws WriterException {//com.google.zxing.EncodeHintType：编码提示类，枚举类型Map<EncodeHintType, Object> hints = new HashMap<>();//EncodeHintType.CHARACTER_SET：设置字符编码类型hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");//EncodeHintType.ERROR_CORRECTION：设置纠错级别//ErrorCorrectionLevel：纠错级别，【L：%7】【M：15%】【Q：25%】[H：30%]//默认为L级别，纠错级别不同，生成的图案不同，但扫描结果一致hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.Q);//EncodeHintType.MARGIN：设置二维码边距，单位像素hints.put(EncodeHintType.MARGIN, 1);//创建工厂类MultiFormatWriter multiFormatWriter = new MultiFormatWriter();//指定二维码类型和参数，返回对应的Writter进行编码后的二维码对象BitMatrix bitMatrix = multiFormatWriter.encode(content, CODE_TYPE, CODE_WIDTH, CODE_HEIGHT, hints);//创建图像缓冲区BufferedImage bufferedImage = new BufferedImage(CODE_WIDTH, CODE_HEIGHT, BufferedImage.TYPE_INT_BGR);//填充for (int x = 0; x < CODE_WIDTH; x++) {for (int y = 0; y < CODE_HEIGHT; y++) {//bitMatrix.get(x, y)返回true，表示黑色即前景色bufferedImage.setRGB(x, y, bitMatrix.get(x, y) ? FRONT_COLOR : BACKGROUND_COLOR);}}return bufferedImage;}}pom文件:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.example</groupId><artifactId>qr</artifactId><version>1.0-SNAPSHOT</version><properties><maven.compiler.source>17</maven.compiler.source><maven.compiler.target>17</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><!-- https://mvnrepository.com/artifact/com.google.zxing/core --><dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.5.3</version></dependency></dependencies><build><plugins><!--(start) for package jar with dependencies --><plugin><artifactId>maven-assembly-plugin</artifactId><version>3.0.0</version><configuration><archive><manifest><mainClass>org.example.Main</mainClass></manifest></archive><descriptorRefs><descriptorRef>jar-with-dependencies</descriptorRef></descriptorRefs></configuration><executions><execution><id>make-assembly</id> <!-- this is used for inheritance merges --><phase>package</phase> <!-- bind to the packaging phase --><goals><goal>single</goal></goals></execution></executions></plugin><!--(end) for package jar with dependencies --></plugins></build>
</project>第一次单独打包一个main为文件，还挺折腾的，但是现在好了。
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