Wie Hyperlink-Informationen extrahieren PDFBox

Question

Ich versuche, die Hyperlink-Informationen aus einer PDF-Datei mit PDFBox zu extrahieren, aber ich bin nicht sicher, wie

for(Object p : pages) { 
    PDPage page = (PDPage)p; 

    List<?> annotations = page.getAnnotations(); 
    for(Object a : annotations) { 
     PDAnnotation annotation = (PDAnnotation)a; 

     if(annotation instanceof PDAnnotationLink) { 
      PDAnnotationLink link = (PDAnnotationLink)annotation; 
      System.out.println(link.toString()); 
      System.out.println(link.getDestination()); 

     } 
    } 

} 

bekommen ich die URL des Hyperlinks Ziel extrahieren möchten und den Text der Hyperlink. Wie kann man das machen?

Dank

Answer 1

Verwenden Sie diesen Code aus dem PrintURLs sample code aus dem Download-Quellcode:

for(PDPage page : doc.getPages()) 
{ 
    pageNum++; 
    PDFTextStripperByArea stripper = new PDFTextStripperByArea(); 
    List<PDAnnotation> annotations = page.getAnnotations(); 
    //first setup text extraction regions 
    for(int j=0; j<annotations.size(); j++) 
    { 
     PDAnnotation annot = annotations.get(j); 
     if(annot instanceof PDAnnotationLink) 
     { 
      PDAnnotationLink link = (PDAnnotationLink)annot; 
      PDRectangle rect = link.getRectangle(); 
      //need to reposition link rectangle to match text space 
      float x = rect.getLowerLeftX(); 
      float y = rect.getUpperRightY(); 
      float width = rect.getWidth(); 
      float height = rect.getHeight(); 
      int rotation = page.getRotation(); 
      if(rotation == 0) 
      { 
       PDRectangle pageSize = page.getMediaBox(); 
       y = pageSize.getHeight() - y; 
      } 
      else if(rotation == 90) 
      { 
       //do nothing 
      } 

      Rectangle2D.Float awtRect = new Rectangle2D.Float(x,y,width,height); 
      stripper.addRegion("" + j, awtRect); 
     } 
    } 

    stripper.extractRegions(page); 

    for(int j=0; j<annotations.size(); j++) 
    { 
     PDAnnotation annot = annotations.get(j); 
     if(annot instanceof PDAnnotationLink) 
     { 
      PDAnnotationLink link = (PDAnnotationLink)annot; 
      PDAction action = link.getAction(); 
      String urlText = stripper.getTextForRegion("" + j); 
      if(action instanceof PDActionURI) 
      { 
       PDActionURI uri = (PDActionURI)action; 
       System.out.println("Page " + pageNum +":'" + urlText.trim() + "'=" + uri.getURI()); 
      } 
     } 
    } 
} 

Es in zwei Teilen arbeitet, wird man die URL bekommen, die einfach ist, wird der andere die URL Text bekommen , was mit einer Textextraktion im Rechteck der Annotation geschieht.

Answer 2

Wir müssen Hyperlink-Informationen und interner Link (z. B. Seite verschieben ....). Ich benutze Code unten:

int pageNum = 0; 
      for (PDPage page : originalPDF.getPages()) { 
       pageNum++; 
       List<PDAnnotation> annotations = page.getAnnotations(); 
       for (PDAnnotation annot : annotations) { 
        if (annot instanceof PDAnnotationLink) { 
         // get dimension of annottations 
         PDAnnotationLink link = (PDAnnotationLink) annot; 
         // get link action include link url and internal link 
         PDAction action = link.getAction(); 
         // get link internal some case specal 
         PDDestination pDestination = link.getDestination(); 

         if (action != null) { 
          if (action instanceof PDActionURI || action instanceof PDActionGoTo) { 
           if (action instanceof PDActionURI) { 
            // get uri link 
            PDActionURI uri = (PDActionURI) action; 
            System.out.println("uri link:" + uri.getURI()); 
           } else { 
            if (action instanceof PDActionGoTo) { 
             // get internal link 
             PDDestination destination = ((PDActionGoTo) action).getDestination(); 
             PDPageDestination pageDestination; 
             if (destination instanceof PDPageDestination) { 
              pageDestination = (PDPageDestination) destination; 
             } else { 
              if (destination instanceof PDNamedDestination) { 
               pageDestination = originalPDF.getDocumentCatalog().findNamedDestinationPage((PDNamedDestination) destination); 
              } else { 
               // error handling 
               break; 
              } 
             } 

             if (pageDestination != null) { 
              System.out.println("page move: " + (pageDestination.retrievePageNumber() + 1)); 
             } 
            } 
           } 
          } 
         } else { 
          if (pDestination != null) { 
           PDPageDestination pageDestination; 
           if (pDestination instanceof PDPageDestination) { 
            pageDestination = (PDPageDestination) pDestination; 
           } else { 
            if (pDestination instanceof PDNamedDestination) { 
             pageDestination = originalPDF.getDocumentCatalog().findNamedDestinationPage((PDNamedDestination) pDestination); 
            } else { 
             // error handling 
             break; 
            } 
           } 

           if (pageDestination != null) { 
            System.out.println("page move: " + (pageDestination.retrievePageNumber() + 1)); 
           } 
          } else { 
           //  
          } 
         } 
        } 
       } 

      }