Java uses itextpdf to implement PDF to convert text and pictures

        <!--rely-->
        <dependency>
            <groupId></groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.13.3</version>
        </dependency>

import ;
import ;
import .*;

public class Main_itextPdf {

    public static void main(String[] args) throws Exception {
        ("--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------);
            // 2. Load PDF file        File file = new File("C:/Users/Administrator/Desktop/Luo Kaiwei's resume.pdf");
            PdfReader reader = new PdfReader(());

            // 3. Parses PDF files and obtains page data            int page = 1; // Get the first page            String text = (reader, page);
            (text);
            // 4. Close PdfReader            ();
        ("------------------------------------------------------------------------------------------------------------------------------);
        }
}

import ;
import ;

import ;
import ;
import .*;
import ;
import ;
import ;

public class Main_itextPdf {

    public static void main(String[] args) throws Exception {
        ("--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------);
// InputStream inputStream = readPdfFromUrl("/");//Online pdf file        InputStream inputStream = new FileInputStream("C:/Users/Administrator/Desktop/Luo Kaiwei's resume.pdf") ;
        byte[] bytes = streamToByte(inputStream);
        InputStream newStream = new ByteArrayInputStream(bytes);
        //Convert pdf stream to png picture stream        InputStream imgStream = pdfToImg(newStream);
        //Storage the image imgStream to the desktop        ((imgStream), "png", new File("C:/Users/Administrator/Desktop/"));
        ("------------------------------------------------------------------------------------------------------------------------------);
    }

    //Support online pdf file address url    public static InputStream readPdfFromUrl(String pdfUrl) throws IOException {
        URL url = new URL(pdfUrl);
        URLConnection connection = ();
        BufferedInputStream bufferedInputStream = new BufferedInputStream(());
        return bufferedInputStream;
    }

    public static ByteArrayInputStream pdfToImg(InputStream pdfStream) throws Exception {
        // Convert InputStream to PDDocument        PDDocument document = (pdfStream);

        // Create PDFRenderer object        PDFRenderer pdfRenderer = new PDFRenderer(document);

        // Select the first page to generate the picture        // You can change it to traverse all pages and save it as needed        BufferedImage bufferedImage = (0, 300); // 0 indicates the first page, 300 DPI provides high-quality images
        // Convert BufferedImage to InputStream        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        (bufferedImage, "PNG", byteArrayOutputStream);
        ();
        // Return a new InputStream        return new ByteArrayInputStream(());
    }
    public static byte[] streamToByte(InputStream inputStream) throws Exception {
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        int nRead;
        byte[] data = new byte[1024];
        while ((nRead = (data, 0, )) != -1) {
            (data, 0, nRead);
        }
        ();
        return ();
    }

}