Remember to use pdfbox once to parse PDF and obtain the key data of PDF

Because of a need , Need to get pdf Data in , For me who has never had similar experience , It still seems unknown , All unknowns are often difficult to judge the workload , So after saying the demand , I will understand this immediately pdf Parsing tool , With understanding , I know some parsing tools , The final parsing code is just a few lines , It's simple . Compared with the unknown pressure before , It's much easier . Then there will be similar pdf Handle , Have similar experience .

pdfbox

Of course, there are other parsing tools , Such as iTika,iText,pdfparser etc. , I will only introduce this time I use , Others should be similar , Please study by yourself .

Actual code example ：

import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.util.Iterator;import java.util.UUID;import javax.imageio.ImageIO;import org.apache.pdfbox.cos.COSName;import org.apache.pdfbox.pdmodel.PDDocument;import org.apache.pdfbox.pdmodel.PDPage;import org.apache.pdfbox.pdmodel.PDResources;import org.apache.pdfbox.pdmodel.encryption.InvalidPasswordException;import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;import org.apache.pdfbox.text.PDFTextStripper;public class PdfTest {    public static void main(String[] args) {        String path = "D:\\temp\\temp\\test.pdf";        File file = new File(path);        //  Use as much as possible try-with-resource Instead of try-catch-finally        try (PDDocument document = PDDocument.load(file)) {            int pageSize = document.getNumberOfPages();            //  Read page by page             for (int i = 0; i < pageSize; i++) {                //  Text content                 PDFTextStripper stripper = new PDFTextStripper();                //  Set sequential output                 stripper.setSortByPosition(true);                stripper.setStartPage(i + 1);                stripper.setEndPage(i + 1);                String text = stripper.getText(document);                System.out.println(text.trim());                System.out.println("-=-=-=-=-=-=-=-=-=-=-=-=-");                //  Picture content                 PDPage page = document.getPage(i);                PDResources resources = page.getResources();                Iterable<COSName> cosNames = resources.getXObjectNames();                if (cosNames != null) {                    Iterator<COSName> cosNamesIter = cosNames.iterator();                    while (cosNamesIter.hasNext()) {                        COSName cosName = cosNamesIter.next();                        if (resources.isImageXObject(cosName)) {                            PDImageXObject Ipdmage = (PDImageXObject) resources.getXObject(cosName);                            BufferedImage image = Ipdmage.getImage();                            try (FileOutputStream out = new FileOutputStream("D:\\temp\\temp\\" + UUID.randomUUID() + ".png")) {                                ImageIO.write(image, "png", out);                            } catch (IOException e) {                            }                        }                    }                }            }        } catch (InvalidPasswordException e) {        } catch (IOException e) {        }    }}

Close test available , Basically, there is no need to change the code , Just put the target file in the target location , You can test .

PDDocument.load(file) You can also pass in the input stream , It is more convenient to handle in this way .