一维码和二维码的生成与解析

转载至https://blog.csdn.net/weixin_38902950/article/details/86771397

注意：

1、Zxing生成的条形码下边没有数字，barcode4j有

2、barcode生成的一维码和二维码扫描后只能显示文本内容，不能跳转到具体页面中

3、Zxing生成的一维码扫描后展示文本，二维码扫描后如果是URL会跳转到指定URL中

maven包

<dependency>
   <groupId>net.sf.barcode4j</groupId>
   <artifactId>barcode4j</artifactId>
   <version>2.1</version>
       </dependency>
       
       <dependency>
       <groupId>org.apache.avalon.framework</groupId>
       <artifactId>avalon-framework-api</artifactId>
       <version>4.3.1</version>
       </dependency>
       <dependency>
       <groupId>com.google.zxing</groupId>
       <artifactId>core</artifactId>
       <version>3.3.3</version>
       </dependency>
       
       <dependency>
       <groupId>com.google.zxing</groupId>
       <artifactId>javase</artifactId>
       <version>3.3.3</version>
       </dependency>

barcode生成一维码和二维码

/**
   * 条形码输出到磁盘
   * @param path
   * @param str
   */
   public static void generateFile(String path,String str) {
       File file = new File(path);
       try {
           generate(new FileOutputStream(file), str);
       } catch (FileNotFoundException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }
   /**
   * 生成条形码
   * @param os
   * @param msg
   */
   public static void generate(OutputStream os,String msg) {
       if(os==null||msg=="") {
           return ;
       }
       Code128Bean cb = new Code128Bean();
       final int dpi = 150;
       final double modouleWidth = UnitConv.in2mm(1.0f / dpi);
       cb.setModuleWidth(modouleWidth);
       cb.doQuietZone(false);
       String format = "image/png";
       try {
           //绘制图片类
           BitmapCanvasProvider provider = new BitmapCanvasProvider(os, format, dpi, BufferedImage.TYPE_BYTE_BINARY, false, 0);
           //生成条码
           cb.generateBarcode(provider, msg);
           provider.finish();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }
   /**
   * 生成二维码
   * @param path
   * @param cont
   */
   public static void generate2Dcode(String path,String cont) {
       BarcodeUtil util = BarcodeUtil.getInstance();
       BarcodeGenerator gen;
       try {
           gen = util.createBarcodeGenerator(buildCfg("datamatrix"));
           OutputStream fout = new FileOutputStream(path);
           int resolution = 300;
           BitmapCanvasProvider canvas = new BitmapCanvasProvider(fout, "image/png", resolution,
                   BufferedImage.TYPE_BYTE_BINARY, false, 0);
           gen.generateBarcode(canvas,cont);
           canvas.finish();
       } catch (Exception e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }

public static void main(String[] args) {
generateFile("G:\\project\\mvnProject\\barCode1Dcode.png", "https://www.baidu.com");
}

zxing生成和解析一维码和二维码

/**
   * generateCode 根据code生成相应的一维码
   * @param file 一维码目标文件
   * @param code 一维码内容
   * @param width 图片宽度
   * @param height 图片高度
   */
public static void generateCode(File file, String code, int width, int height) {
   //定义位图矩阵BitMatrix
BitMatrix matrix = null;

try {
// 使用code_128格式进行编码生成100*25的条形码
   MultiFormatWriter writer = new MultiFormatWriter();

matrix = writer.encode(code,BarcodeFormat.CODE_128, width, height, null);
//matrix = writer.encode(code,BarcodeFormat.EAN_13, width, height, null);
} catch (WriterException e) {
e.printStackTrace();
}

//将位图矩阵BitMatrix保存为图片
try (FileOutputStream outStream = new FileOutputStream(file)) {
ImageIO.write(MatrixToImageWriter.toBufferedImage(matrix), "png",
outStream);
outStream.flush();
} catch (Exception e) {
   e.printStackTrace();
}
}

/**
* readCode 读取一张一维码图片
* @param file 一维码图片名字
*/
public static void readCode(File file){
try {
   BufferedImage image = ImageIO.read(file);
if (image == null) {
return;
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

Map<DecodeHintType, Object> hints = new HashMap<>();
hints.put(DecodeHintType.CHARACTER_SET, "GBK");
hints.put(DecodeHintType.PURE_BARCODE, Boolean.TRUE);
hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);

Result result = new MultiFormatReader().decode(bitmap, hints);
System.out.println("条形码内容: "+result.getText());
} catch (Exception e) {
e.printStackTrace();
}
}
/*
* 定义二维码的宽高
*/
private static int WIDTH = 300;
private static int HEIGHT = 300;
private static String FORMAT = "png";//二维码格式

//生成二维码
public static void generateQRCode(File file, String content) {
//定义二维码参数
Map<EncodeHintType, Object> hints = new HashMap<>();

hints.put(EncodeHintType.CHARACTER_SET, "utf-8");//设置编码
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);//设置容错等级
hints.put(EncodeHintType.MARGIN, 2);//设置边距默认是5

try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);
Path path = file.toPath();
MatrixToImageWriter.writeToPath(bitMatrix, FORMAT, path);//写到指定路径下

} catch (Exception e) {
e.printStackTrace();
}

}

//读取二维码
public static void readQrCode(File file) {
MultiFormatReader reader = new MultiFormatReader();
try {
BufferedImage image = ImageIO.read(file);
BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
Map<DecodeHintType, Object> hints = new HashMap<>();
hints.put(DecodeHintType.CHARACTER_SET, "utf-8");//设置编码
Result result = reader.decode(binaryBitmap, hints);
System.out.println("解析结果:" + result.toString());
System.out.println("二维码格式:" + result.getBarcodeFormat());
System.out.println("二维码文本内容:" + result.getText());
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
       // TODO Auto-generated method stub
       //generateCode(new File("G:\\zxing1Dcode.png"), "https://www.baidu.com", 120, 120);
       generateQRCode(new File("G:\\zxing2Dcode.png"), "https://www.baidu.com");
   }