将文本转为二维码图片Base64编码

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.lianpay.globalpay.common.exception.BizFailException;
import sun.misc.BASE64Encoder;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Hashtable;

public class QrcodeUtil {

    public static String creatRrCode(String contents, int width, int height) {
        String binary = null;
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        try {

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

            // 1、读取文件转换为字节数组
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            BufferedImage image = toBufferedImage(bitMatrix);
            //转换成png格式的IO流
            ImageIO.write(image, "png", out);
            byte[] bytes = out.toByteArray();
            // 2、将字节数组转为二进制
            BASE64Encoder encoder = new BASE64Encoder();
            binary = encoder.encodeBuffer(bytes).trim();
        } catch (Exception e) {
            throw new BizFailException("product qrcode fail");
        }
        return binary;
    }

    /**
     * image流数据处理
     *
     * @author ianly
     */
    public static BufferedImage toBufferedImage(BitMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, matrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        return image;
    }

    public static void main(String[] args) {
        String base64 = QrcodeUtil.creatRrCode("|010556008962106\n" +
                "132022120604337025\n" +
                "142019050800009001\n" +
                "2211", 480, 480);
        System.out.println(base64);
    }
}