content: package me.flyray.common.utils;
  
  import java.awt.Color;
  import java.awt.Graphics2D;
  import java.awt.image.BufferedImage;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.util.Hashtable;
  
  import javax.imageio.ImageIO;
  
  import com.google.zxing.BarcodeFormat;
  import com.google.zxing.BinaryBitmap;
  import com.google.zxing.EncodeHintType;
  import com.google.zxing.LuminanceSource;
  import com.google.zxing.ReaderException;
  import com.google.zxing.Result;
  import com.google.zxing.WriterException;
  import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
  import com.google.zxing.common.BitMatrix;
  import com.google.zxing.common.HybridBinarizer;
  import com.google.zxing.qrcode.QRCodeReader;
  import com.google.zxing.qrcode.QRCodeWriter;
  import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
  
  /**
   * 二维码生成和读的工具类
   *
   */
  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());  
      }
      /**
       * 测试代码
       * @throws WriterException 
       */
      public static void main(String[] args) throws IOException, WriterException {  
          
          createQrCode(new FileOutputStream(new File("F:/assets/test/qrcode.jpg")),"WE1231238239128sASDASDSADSDWEWWREWRERWSDFDFSDSDF123123123123213123",900,"JPEG");
          readQrCode(new FileInputStream(new File("F:/assets/test/qrcode.jpg")));  
      }  
    
  }