用java 将 jb2 文件转图片的方法

引用包

<dependency>
  <groupId>com.levigo.jbig2</groupId>
  <artifactId>levigo-jbig2-imageio</artifactId>
  <version>2.0</version>
</dependency>

代码
//代码效果参考：http://www.zidongmutanji.com/zsjx/214531.html

复制代码
package r.a.h.grant.gbt33190;

import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.QRCodeReader;
import com.levigo.jbig2.JBIG2ImageReader;
import com.levigo.jbig2.JBIG2ImageReaderSpi;
import com.levigo.jbig2.io.DefaultInputStreamFactory;

import javax.imageio.ImageIO;
import javax.imageio.stream.ImageInputStream;
import java.awt.image.BufferedImage;
import java.io.*;

/**

• grant
• 4/6/2020 5:21 下午

• 描述：
  */
  public class ImageTest {
  public static void main(String[] args) throws IOException, FormatException, ChecksumException, NotFoundException {

   String filepath = "/Users/grant/Documents/个人/image_108.jb2";
  
   int imageIndex = 0;
  
   InputStream inputStream = new FileInputStream(filepath);
   DefaultInputStreamFactory disf = new DefaultInputStreamFactory();
   ImageInputStream imageInputStream = disf.getInputStream(inputStream);
  

  //代码效果参考：http://www.zidongmutanji.com/bxxx/447648.html

   JBIG2ImageReader imageReader = new JBIG2ImageReader(new JBIG2ImageReaderSpi());
   imageReader.setInput(imageInputStream);
  
   // long timeStamp = System.currentTimeMillis();
   BufferedImage bufferedImage = imageReader.read(imageIndex, imageReader.getDefaultReadParam());
  
   ImageIO.write(bufferedImage, "jpg", new File("/Users/grant/Documents/个人/image_108.jpg"));
  
   BinaryBitmap binaryBitmap= new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(bufferedImage)));
   QRCodeReader qrCodeReader = new QRCodeReader();
   Result result = qrCodeReader.decode(binaryBitmap);
   System.out.println(result.getText());
  

  }
  }