JAVA实现二维码制作和读取

项目结构：

image.png

pom.xml代码：

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.0</version>
        </dependency>

        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.3.0</version>
        </dependency>
    </dependencies>

二维码制作和解析：

import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class ZxingCode {
    //二维码颜色
    private static final int BLACK = 0xFF000000;
    //二维码颜色
    private static final int WHITE = 0xFFFFFFFF;

    /**
     * ZXing方式生成二维码
     * @param text    二维码内容
     * @param width    二维码宽
     * @param height    二维码高
     * @param outPutPath    二维码生成保存路径
     * @param imageType        二维码生成格式
     */
    public void zxingCodeCreate(String text, int width, int height, String outPutPath, String imageType) {
        Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>();
        //设置编码字符集
        his.put(EncodeHintType.CHARACTER_SET, "utf-8");
        try {
            //1、生成二维码
            BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, his);

            //2、获取二维码宽高
            int codeWidth = encode.getWidth();
            int codeHeight = encode.getHeight();

            //3、将二维码放入缓冲流
            BufferedImage image = new BufferedImage(codeWidth, codeHeight, BufferedImage.TYPE_INT_RGB);
            for (int i = 0; i < codeWidth; i++) {
                for (int j = 0; j < codeHeight; j++) {
                    //4、循环将二维码内容定入图片
                    image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE);
                }
            }
            File outPutImage = new File(outPutPath);
            //如果图片不存在创建图片
            if(!outPutImage.exists()){
                outPutImage.createNewFile();
            }

            //5、将二维码写入图片
            ImageIO.write(image, imageType, outPutImage);

        } catch (WriterException e) {
            e.printStackTrace();
            System.out.println("二维码生成失败");
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("生成二维码图片失败");
        }
    }

    /**
     * 二维码解析
     * @param analyzePath    二维码路径
     * @return
     * @throws IOException
     */
    public Object zxingCodeAnalyze(String analyzePath) throws Exception{
        MultiFormatReader formatReader = new MultiFormatReader();
        Object result = null;
        try {
            File file = new File(analyzePath);
            if (!file.exists())
            {
                return "二维码不存在";
            }
            BufferedImage image = ImageIO.read(file);
            LuminanceSource source = new BufferedImageLuminanceSource(image);
            Binarizer binarizer = new HybridBinarizer(source);
            BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);
            Map hints = new HashMap();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            result = formatReader.decode(binaryBitmap, hints);
        } catch (NotFoundException e) {
            e.printStackTrace();
        }
        return result;
    }
}

功能测试：

public class Test {
    public static void main(String[] args){
        //测试制作二维码
        String text = "wzf制作的二维码！";
        String outputPath = "E://wzf.jpg";
        ZxingCode zc = new ZxingCode();
        zc.zxingCodeCreate(text,300,300,outputPath,"jpg");

        //测试解析二维码
        try {
            Object object = zc.zxingCodeAnalyze(outputPath);
            System.out.println(object.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}