package com.runtime.extend.utils.CodeCreate;

import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
//import com.google.zxing.client.j2se.BufferedImageLuminanceSource;

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

/**
 *     
 * 项目名称：bic-xxzthzsgl   
 * 类名称：qrCodeCreateUtil   
 * 类描述：二维码生成工具类
 * 创建人：MFJ   
 * 创建时间：2019/1/10 8:50   
 * 修改备注：   
 *
 * @version  1.0       
 */
public class qrCodeCreateUtil {

    /**
     * 生成包含字符串信息的二维码图片
     *
     * @param outputStream 文件输出流路径
     * @param content      二维码携带信息
     * @param qrCodeSize   二维码图片大小
     * @param imageFormat  二维码的格式
     * @throws WriterException
     * @throws IOException
     */
    public static boolean createQrCode(OutputStream outputStream, String content, int qrCodeSize, String imageFormat) throws WriterException, IOException {
        //设置二维码纠错级别ＭＡＰ
        Hashtable<EncodeHintType, ErrorCorrectionLevel> hintMap = new Hashtable<EncodeHintType, ErrorCorrectionLevel>();
        hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);  // 矫错级别
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        //创建比特矩阵(位矩阵)的QR码编码的字符串
        BitMatrix byteMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, qrCodeSize, qrCodeSize, hintMap);
        // 使BufferedImage勾画QRCode  (matrixWidth 是行二维码像素点)
        int matrixWidth = byteMatrix.getWidth();
        BufferedImage image = new BufferedImage(matrixWidth - 200, matrixWidth - 200, BufferedImage.TYPE_INT_RGB);
        image.createGraphics();
        Graphics2D graphics = (Graphics2D) image.getGraphics();
        graphics.setColor(Color.WHITE);
        graphics.fillRect(0, 0, matrixWidth, matrixWidth);
        // 使用比特矩阵画并保存图像
        graphics.setColor(Color.BLACK);
        for (int i = 0; i < matrixWidth; i++) {
            for (int j = 0; j < matrixWidth; j++) {
                if (byteMatrix.get(i, j)) {
                    graphics.fillRect(i - 100, j - 100, 1, 1);
                }
            }
        }
        return ImageIO.write(image, imageFormat, outputStream);
    }

    /**
          * 读二维码并输出携带的信息
         */
//    public static void readQrCode(InputStream inputStream) throws IOException{
//              //从输入流中获取字符串信息
//               BufferedImage image = ImageIO.read(inputStream);
//            //将图像转换为二进制位图源
//           LuminanceSource source = new BufferedImageLuminanceSource(image);
//          BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
//             QRCodeReader reader = new QRCodeReader();
//            Result result = null ;
//            try {
//                  result = reader.decode(bitmap);
//                } catch (ReaderException e) {
//                     e.printStackTrace();
//                   }
//               System.out.println(result.getText());
//           }

    public static void main(String[] args) throws IOException, WriterException {

                createQrCode(new FileOutputStream(new File("d:\\qrcode.jpg")),"WE1231238239128sASDASDSADSDWEWWREWRERWSDFDFSDSDF123123123123213123",900,"JPEG");
//                readQrCode(new FileInputStream(new File("d:\\qrcode.jpg")));
           }

}