java 读取PDF目录、对应页码

末蓝、 2022-04-11 09:43 828阅读 0赞

import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    
    import org.apache.pdfbox.io.RandomAccessBuffer;
    import org.apache.pdfbox.pdfparser.PDFParser;
    import org.apache.pdfbox.pdmodel.PDDocument;
    import org.apache.pdfbox.pdmodel.interactive.action.PDActionGoTo;
    import org.apache.pdfbox.pdmodel.interactive.documentnavigation.destination.PDPageDestination;
    import org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline.PDDocumentOutline;
    import org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline.PDOutlineItem;
    import org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline.PDOutlineNode;
    
    public class Pdf {
    	
    	public void printBookmarks(PDOutlineNode bookmark,String indentation) throws IOException{
    		PDOutlineItem current = bookmark.getFirstChild();
    		while(current != null){
    			int pages = 0;
    			if(current.getDestination() instanceof PDPageDestination){
    				PDPageDestination pd = (PDPageDestination) current.getDestination();
    				pages = pd.retrievePageNumber() + 1;
    			}
    			if (current.getAction()  instanceof PDActionGoTo) {
    				PDActionGoTo gta = (PDActionGoTo) current.getAction();
    				if (gta.getDestination() instanceof PDPageDestination) {
    					PDPageDestination pd = (PDPageDestination) gta.getDestination();
    					pages = pd.retrievePageNumber() + 1;
    				}
    			}
    			if (pages == 0) {
    				System.out.println(indentation+current.getTitle());
    			}else{
    				System.out.println(indentation+current.getTitle()+"  "+pages);
    			}
    			printBookmarks( current, indentation + "    " );
    			current = current.getNextSibling();
    		}
    	}
    	public static void main(String[] args) throws IOException {
    		File file = new File("/Users/Desktop/pdf/CB.pdf");
    		PDDocument doc = null;
    		FileInputStream  fis = null;
    		try {
    			fis = new FileInputStream(file);
    			PDFParser parser = new PDFParser(new RandomAccessBuffer(fis));
    			parser.parse();
    			doc = parser.getPDDocument();
    			PDDocumentOutline outline = doc.getDocumentCatalog().getDocumentOutline();
    			Pdf pdf = new Pdf();
    			if (outline != null) {
    				pdf.printBookmarks(outline, "");
    			}
    		} catch (FileNotFoundException e) {
    			e.printStackTrace();
    		}
    		
    	}
    }