package com.qrcode.zxing;

import java.io.File;
import java.nio.file.Path;
import java.util.HashMap;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

//生成二维码
public class CreateQRCode {
    public static void main(String[] args) {
        int width = 300;
        int height = 300;
        String format = "png";
        String content = "二维码的信息";
        
        //定义二维码的参数
        HashMap hints = new HashMap();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.MARGIN, 2);
        //生成二维码
        try {
            BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height,hints);
            Path file = new File("D:/erweima/"+System.currentTimeMillis()+".png").toPath();
            MatrixToImageWriter.writeToPath(bitMatrix, format, file );
        } catch (Exception e) {
            e.printStackTrace();
        }
        
    }
}

/******* 二维码信息读取******/

package com.qrcode.zxing;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;

public class ReadQRCode {
    public static void main(String[] args) {
        try {
            MultiFormatReader formatreader = new MultiFormatReader();
            File file = new File("D:/erweima/1565235519726.png");
            BufferedImage image = ImageIO.read(file);
            BinaryBitmap binarybitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
            
            HashMap hints = new HashMap();
            hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
            Result result = formatreader.decode(binarybitmap,hints);
            System.out.println("解析结果:"+result.toString());
        }catch (NotFoundException e) {
            e.printStackTrace();
        }catch (IOException e) {
            e.printStackTrace();
        }
        
    }

}

觉得有帮助的可以支持一下博主