Apache PDFBox将pdf转换为图像

3 回答

• 84

  1.8 . *版本的解决方案：

  PDDocument document = PDDocument.loadNonSeq(new File(pdfFilename), null);
  List<PDPage> pdPages = document.getDocumentCatalog().getAllPages();
  int page = 0;
  for (PDPage pdPage : pdPages)
  { 
      ++page;
      BufferedImage bim = pdPage.convertToImage(BufferedImage.TYPE_INT_RGB, 300);
      ImageIOUtil.writeImage(bim, pdfFilename + "-" + page + ".png", 300);
  }
  document.close();
  

  在构建之前不要忘记阅读1.8 dependencies page .

  2.0版本的解决方案：

  PDDocument document = PDDocument.load(new File(pdfFilename));
  PDFRenderer pdfRenderer = new PDFRenderer(document);
  for (int page = 0; page < document.getNumberOfPages(); ++page)
  { 
      BufferedImage bim = pdfRenderer.renderImageWithDPI(page, 300, ImageType.RGB);
  
      // suffix in filename will be used as the file format
      ImageIOUtil.writeImage(bim, pdfFilename + "-" + (page+1) + ".png", 300);
  }
  document.close();
  

  ImageIOUtil类位于单独的下载/工件（pdf-tools）中 . 在进行构建之前阅读2.0 dependencies page，您将需要额外的jar文件用于带有jbig2图像的PDF，用于保存到tiff图像和读取加密文件 .

  确保使用您正在使用的任何JDK版本的最新版本，即如果您使用的是jdk8，则不要使用版本1.8.0_5，请使用1.8.0_191或您阅读时的最新版本 . 早期版本非常慢 .

  回复于 2024-04-19T21:04:34+08:00
• 1

  没有任何额外的依赖项，您可以使用 PDFBox 中已包含的 PDFToImage 类 .

  科特林：

  PDFToImage.main(arrayOf<String>("-outputPrefix", "newImgFilenamePrefix", existingPdfFilename))

  其他配置选择：https://pdfbox.apache.org/docs/2.0.8/javadocs/org/apache/pdfbox/tools/PDFToImage.html

  回复于 2024-04-19T21:04:34+08:00
• 0

  public class PDFtoJPGConverter {
  
       public List<File> convertPdfToImage(File file, String destination) throws Exception {
  
      File destinationFile = new File(destination);
  
      if (!destinationFile.exists()) {
          destinationFile.mkdir();
          System.out.println("DESTINATION FOLDER CREATED -> " + destinationFile.getAbsolutePath());
      }else if(destinationFile.exists()){
          System.out.println("DESTINATION FOLDER ALLREADY CREATED!!!");
      }else{
          System.out.println("DESTINATION FOLDER NOT CREATED!!!");
      }
  
      if (file.exists()) {
          PDDocument doc = PDDocument.load(file);
          PDFRenderer renderer = new PDFRenderer(doc);
          List<File> fileList = new ArrayList<File>();
  
          String fileName = file.getName().replace(".pdf", "");
          System.out.println("CONVERTER START.....");
  
          for (int i = 0; i < doc.getNumberOfPages(); i++) {
              // default image files path: original file path
              // if necessary, file.getParent() + "/" => another path
              File fileTemp = new File(destination + fileName + "_" + i + ".jpg"); // jpg or png
              BufferedImage image = renderer.renderImageWithDPI(i, 200);
              // 200 is sample dots per inch.
              // if necessary, change 200 into another integer.
              ImageIO.write(image, "JPEG", fileTemp); // JPEG or PNG
              fileList.add(fileTemp);
          }
          doc.close();
          System.out.println("CONVERTER STOPTED.....");
          System.out.println("IMAGE SAVED AT -> " + destinationFile.getAbsolutePath());
          return fileList;
      } else {
          System.err.println(file.getName() + " FILE DOES NOT EXIST");
      }
      return null;
      }
  
        public static void main(String[] args) {
  
      try {
          PDFtoJPGConverter converter = new PDFtoJPGConverter();
          Scanner sc = new Scanner(System.in);
          System.out.print("Enter your destination folder where save image \n");
          // Destination = D:/PPL/;
          String destination = sc.nextLine();
  
          System.out.print("Enter your selected pdf files name with source folder \n");
          String sourcePathWithFileName = sc.nextLine();
          // Source Path = D:/PDF/ant.pdf,D:/PDF/abc.pdf,D:/PDF/xyz.pdf
          if (sourcePathWithFileName != null || sourcePathWithFileName != "") {
              String[] files = sourcePathWithFileName.split(",");
              for (String file : files) {
                  File pdf = new File(file);
                  System.out.print("FILE:>> "+ pdf);
                  converter.convertPdfToImage(pdf, destination);
              }
          }
  
      } catch (Exception ex) {
          ex.printStackTrace();
      }
    }
  
  }
  

  ====================================

  在这里，我使用Apache pdfbox-2.0.8，commons-logging-1.2和fontbox-2.0.8 Library

  快乐编码:)

  回复于 2024-04-19T21:04:34+08:00