Java生成读取条形码和二维码的简单示例

<dependencies>
        <!-- https://mvnrepository.com/artifact/com.google.zxing/javase -->
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.2.1</version>
        </dependency>

        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.0.0</version>
        </dependency>
</dependencies>

public static void main(String[] args) {
    generateCode(new File("1dcode.png"), "1390351289", 500, 250);
}
/**
 * @param file    生成的文件名称
 * @param code    一维码存储的数据信息
 * @param width   生成图片的宽度
 * @param height  生成图片的高度
 * @return void
 * */
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);
    } catch (WriterException e) {
        e.printStackTrace();
    }

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

public static void main(String[] args) {
    readCode(new File("1dcode.png"));
}
/**
 * @param readImage    读取一维码图片名
 * @return void
 * */
public static void readCode(File readImage) {
    try {
        BufferedImage image = ImageIO.read(readImage);
        if (image == null) {
            return;
        }
        LuminanceSource source = new BufferedImageLuminanceSource(image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

        Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
        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(result.getText());
    } catch (Exception e) {
        e.printStackTrace();
    }
}

/** 定义二维码的宽度 */
private final static int WIDTH = 300;
/** 定义二维码的高度 */
private final static int HEIGHT = 300;
/** 定义二维码的格式 */
private final static String FORMAT = "png";

/**
 * @param file
 * @param content
 * @return void
 * */
public static void generateQRCode(File file, String content) {
    // 定义二维码参数
    Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
    // 设置编码
    hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
    // 设置容错等级
    hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
    // 设置边距，默认为5
    hints.put(EncodeHintType.MARGIN, 2);

    try {
        BitMatrix bitMatrix = new MultiFormatWriter()
                .encode(content, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);
        Path path = file.toPath();
        // 保存到项目跟目录中
        MatrixToImageWriter.writeToPath(bitMatrix, FORMAT, path);
    } catch (Exception e) {
        e.printStackTrace();
    }
}
public static void main(String[] args) {
    generateQRCode(new File("smt.png"), "淑玫唐家居网");
}

/**
 * @param file    读取二维码的文件名
 * @return void
 * */
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");
        Result result = reader.decode(binaryBitmap, hints);
        System.out.println("解析结果: " + new String(result.toString().getBytes("GBK"), "GBK"));
        System.out.println("二维码格式: " + result.getBarcodeFormat());
        System.out.println("二维码文本内容: " + new String(result.getText().getBytes("GBK"), "GBK"));
    } catch (Exception e) {
        e.printStackTrace();
    }
}
public static void main(String[] args) {
    readQRCode(new File("smt.png"));
}