Apache PDFBox convert pdf to images
有人可以举例说明如何使用Apache PDFBox在不同的图像中转换pdf(pdf的每一页都有一个)。 提前致谢
1.8。*版本的解决方案:
1 2 3 4 5 6 7 8 9 10 | 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依赖项页面。
2.0版本的解决方案:
1 2 3 4 5 6 7 8 9 10 | 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,请阅读2.0依赖关系页面,您将需要额外的带有jbig2图像的PDF文件,用于保存到tiff图像以及读取加密文件。
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。
我今天用PdfBox 2.0.15试了一下。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | import org.apache.pdfbox.pdmodel.*; import org.apache.pdfbox.rendering.*; import java.awt.image.*; import java.io.*; import javax.imageio.*; public static void PDFtoJPG (String in, String out) throws Exception { PDDocument pd = PDDocument.load (new File (in)); PDFRenderer pr = new PDFRenderer (pd); BufferedImage bi = pr.renderImageWithDPI (0, 300); ImageIO.write (bi,"JPEG", new File (out)); } |
没有任何额外的依赖项,您可以使用
科特林:
其他配置选择:https://pdfbox.apache.org/docs/2.0.8/javadocs/org/apache/pdfbox/tools/PDFToImage.html
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | 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 "); // Destination = D:/PPL/; String destination = sc.nextLine(); System.out.print("Enter your selected pdf files name with source folder "); 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:)