import java.io.File;

import java.util.Hashtable;

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;

//编码

public class QREncoder {

    public static void main(String[] args) throws Exception {

        String content = "hello world";

        String encoding = "utf-8";

        int width = 150;

        int height = 150;

        String format = "jpg";

        File imagePath = new File("d:/test.jpg");

        com.google.zxing.Writer writer = new MultiFormatWriter();

        Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>(2);

        hints.put(EncodeHintType.CHARACTER_SET, encoding);

        BitMatrix matrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height, hints);

        MatrixToImageWriter.writeToFile(matrix, format, imagePath);

    }

}

import java.io.File;

import java.util.Hashtable;

import javax.imageio.ImageIO;

import com.google.zxing.Binarizer;

import com.google.zxing.BinaryBitmap;

import com.google.zxing.DecodeHintType;

import com.google.zxing.LuminanceSource;

import com.google.zxing.MultiFormatReader;

import com.google.zxing.Reader;

import com.google.zxing.Result;

import com.google.zxing.client.j2se.BufferedImageLuminanceSource;

import com.google.zxing.common.GlobalHistogramBinarizer;

//解码

public class QRDecoder {

    public static void main(String[] args) throws Exception {

        File imagePath = new File("d:/test.jpg");

        String encoding = "utf-8";

        Reader reader = new MultiFormatReader();

        LuminanceSource ls = new BufferedImageLuminanceSource(ImageIO.read(imagePath));

        Binarizer b = new GlobalHistogramBinarizer(ls);

        Hashtable<DecodeHintType, String> hint1 = new Hashtable<DecodeHintType, String>(2);

        hint1.put(DecodeHintType.CHARACTER_SET, encoding);

        Result r = reader.decode(new BinaryBitmap(b), hint1);

        System.out.println(r.getText());

    }

}