使用zxing生成二维码图片，并解析

来源：互联网发布：淘宝商品种类编辑：程序博客网时间：2024/05/04 16:43

最近在项目中使用到了由二维码图片的生成和解析。

下面我就简单是写一个小小的示例。

首先是使用的maven创建项目，所以我们先引入zxing的相关依赖。

<!-- 二维码相关的依赖 -->        <dependency>            <groupId>com.google.zxing</groupId>            <artifactId>core</artifactId>            <version>3.2.0</version>        </dependency>        <dependency>            <groupId>com.google.zxing</groupId>            <artifactId>javase</artifactId>            <version>3.2.0</version>        </dependency>

只需要引入这两个依赖就可以了。

接下来就可以测试验证了。

package com.study;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import java.nio.file.FileSystems;import java.nio.file.Path;import java.util.HashMap;import java.util.Map;import javax.imageio.ImageIO;import net.sf.json.JSONException;import com.google.zxing.BarcodeFormat;import com.google.zxing.Binarizer;import com.google.zxing.BinaryBitmap;import com.google.zxing.DecodeHintType;import com.google.zxing.EncodeHintType;import com.google.zxing.LuminanceSource;import com.google.zxing.MultiFormatReader;import com.google.zxing.MultiFormatWriter;import com.google.zxing.NotFoundException;import com.google.zxing.Result;import com.google.zxing.WriterException;import com.google.zxing.client.j2se.BufferedImageLuminanceSource;import com.google.zxing.client.j2se.MatrixToImageWriter;import com.google.zxing.common.BitMatrix;import com.google.zxing.common.HybridBinarizer;/* * @author jianweigang  * （1）使用zxing工具，根据一串字符生成一个包含该串字符的二维码图片。 * （2）使用zxing工具，加载一个二维码图片，解析里面包含的内容。 */public class MiQRCreate {/**     * 生成图像     *     * @throws com.google.zxing.WriterException     * @throws java.io.IOException     */    public void testEncode() throws WriterException, IOException, JSONException {        String filePath = "/home/jianweigang/qr/";        String fileName = "zxing.png";        String content = "http://staging.m.pay.xiaomi.com/test/qrpay/544165145454";        int width = 400;  //图像宽度        int height = 400;  //图像高度        String format = "png";  //图像类型        Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");        hints.put(EncodeHintType.MARGIN, 0); //此处去白边没有其任何作用（得分析源代码了）        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);// 生成矩阵       //1.1去白边        int[] rec = bitMatrix.getEnclosingRectangle();        int resWidth = rec[2] + 1;        int resHeight = rec[3] + 1;        BitMatrix resMatrix = new BitMatrix(resWidth, resHeight);        resMatrix.clear();        for (int i = 0; i < resWidth; i++) {            for (int j = 0; j < resHeight; j++) {                if (bitMatrix.get(i + rec[0], j + rec[1])) {                     resMatrix.set(i, j);                }            }        }        Path path = FileSystems.getDefault().getPath(filePath, fileName);        MatrixToImageWriter.writeToPath(resMatrix, format, path);// 输出图像    }    /**     * 解析图像     */    public void testDecode() throws WriterException, IOException, JSONException{        String filePath = "/home/jianweigang/qr/zxing.png";        BufferedImage image;        try {            image = ImageIO.read(new File(filePath));            LuminanceSource source = new BufferedImageLuminanceSource(image);            Binarizer binarizer = new HybridBinarizer(source);            BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);            Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();            hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");            Result result = new MultiFormatReader().decode(binaryBitmap, hints);  //对图像进行解码            System.out.println("content: " + result.getText());            System.out.println("encode： " + result.getBarcodeFormat());        } catch (IOException e) {            e.printStackTrace();        } catch (NotFoundException e) {            e.printStackTrace();        }    }    public static void main(String[] args) throws JSONException, IOException, WriterException {        MiQRCreate test = new MiQRCreate();        test.testEncode();        test.testDecode();    }}

以上代码验证正确

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