zxing 生成二维码

一、zxing介绍

　　zxing是google提供生成、解析一维码、二维码的开源库。

二、使用

2.1 maven pom 配置

    <dependency>

        <groupId>com.google.zxing</groupId>

        <artifactId>core</artifactId>

        <version>3.0.0</version>

    </dependency>

    <dependency>

        <groupId>com.google.zxing</groupId>

        <artifactId>javase</artifactId>

        <version>3.0.0</version>

    </dependency>

2.2 二维码生成

      /**

     * 编码

     *

     * @param contents

     * @param width

     * @param height

     * @param imgPath

     */

    public static void encode(String contents, int width, int height, String imgPath) {

        try {

            BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height);

            MatrixToImageWriter.writeToFile(bitMatrix, "png", new File(imgPath));

        } catch (Exception e) {

            e.printStackTrace();

        }

    }        

    /**

     * @param args

     */

    public static void main(String[] args) {

        String imgPath = "/Users/xupengwei/tool/yuanmeng/zxing.png";

        String contents = "http://taobao.com";

        int width = 300, height = 300;

        QrCode.encode(contents, width, height, imgPath);

    } 

结果

2.3 二维码解码

    /**

     * @param imgPath

     * @return String

     */

    public static String decode(String imgPath) {

        BufferedImage image = null;

        Result result = null;

        try {

            image = ImageIO.read(new File(imgPath));

            LuminanceSource source = new BufferedImageLuminanceSource(image);

            BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

            result = new MultiFormatReader().decode(bitmap);

            return result.getText();

        } catch (Exception e) {

            e.printStackTrace();

        }

        return null;

    }

    public static void main(String[] args) {

        String imgPath = "/Users/xupengwei/tool/yuanmeng/zxing.png";

        String decodeContent = QrCode.decode(imgPath);

        System.out.println(decodeContent);

    }

结果：

http://taobao.com

三、参考文献

1、https://github.com/zxing/zxing

2、API 文档 ： https://zxing.github.io/zxing/apidocs/