1、需要引入下面的pom坐标如下
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​2.完整代码如下
import com.github.binarywang.utils.qrcode.BufferedImageLuminanceSource;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;
import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import java.awt.image.BufferedImage;
import java.util.HashMap;

/**
* 获取pdf中固定位置图片的二维码，然后解析
*/
public class GetCoordinatesOfImage {

    public static void main(String[] args) throws Exception {
        PdfDocument doc = new PdfDocument("D://chukoupingzheng.pdf");
        PdfPageBase page = doc.getPages().get(0);
        BufferedImage[] bufferedImages = page.extractImages();

       //获取最后一张图片
        BufferedImage outImage = bufferedImages[bufferedImages.length - 1];
        MultiFormatReader formatReader = new MultiFormatReader();
        BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(outImage)));
        // 定义二维码的参数
        HashMap hints = new HashMap();
        //设置编码字符集
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        //处理读取结果
        Result result = formatReader.decode(binaryBitmap, hints);

        System.out.println("解析结果：" + result.toString());
        System.out.println("二维码格式类型：" + result.getBarcodeFormat());
        System.out.println("result：" + result.toString().replace("*",""));

    }
}

 3.运行结果如下

 4.示例pdf部分，标注图片索引

测试代码解析的是最后一张二维码图片，可根据位置自行调整