<!--2.itexpdf依賴-->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.13.3</version>
        </dependency>

import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.parser.PdfTextExtractor;
import java.io.*;

public class Main_itextPdf {

    public static void main(String[] args) throws Exception {
        System.out.println("------------------------pdf提取文本開始------------------------------");
            // 2. 加載PDF文件
        File file = new File("C:/Users/Administrator/Desktop/羅鎧威個人簡歷.pdf");
            PdfReader reader = new PdfReader(file.getAbsolutePath());

            // 3. 解析PDF文件，獲取頁面數(shù)據(jù)
            int page = 1; // 獲取第一頁
            String text = PdfTextExtractor.getTextFromPage(reader, page);
            System.out.println(text);
            // 4. 關(guān)閉PdfReader
            reader.close();
        System.out.println("------------------------pdf提取文本結(jié)束------------------------------");
        }
}

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.util.Scanner;

public class Main_itextPdf {

    public static void main(String[] args) throws Exception {
        System.out.println("------------------------pdf轉(zhuǎn)圖片開始------------------------------");
//        InputStream inputStream = readPdfFromUrl("http://minio.xxxx/xxxx.pdf");//線上的pdf文件
        InputStream inputStream = new FileInputStream("C:/Users/Administrator/Desktop/羅鎧威個人簡歷.pdf") ;
        byte[] bytes = streamToByte(inputStream);
        InputStream newStream = new ByteArrayInputStream(bytes);
        //將pdf流轉(zhuǎn)換成png圖片流
        InputStream imgStream = pdfToImg(newStream);
        //存儲圖片imgStream到桌面
        ImageIO.write(ImageIO.read(imgStream), "png", new File("C:/Users/Administrator/Desktop/1.png"));
        System.out.println("------------------------pdf轉(zhuǎn)圖片結(jié)束------------------------------");
    }

    //支持線上pdf文件地址url
    public static InputStream readPdfFromUrl(String pdfUrl) throws IOException {
        URL url = new URL(pdfUrl);
        URLConnection connection = url.openConnection();
        BufferedInputStream bufferedInputStream = new BufferedInputStream(connection.getInputStream());
        return bufferedInputStream;
    }

    public static ByteArrayInputStream pdfToImg(InputStream pdfStream) throws Exception {
        // 將 InputStream 轉(zhuǎn)換為 PDDocument
        PDDocument document = PDDocument.load(pdfStream);

        // 創(chuàng)建 PDFRenderer 對象
        PDFRenderer pdfRenderer = new PDFRenderer(document);

        // 選擇第一頁面來生成圖片
        // 可以根據(jù)需要改成遍歷所有頁面并保存
        BufferedImage bufferedImage = pdfRenderer.renderImageWithDPI(0, 300); // 0 表示第一頁，300 DPI 提供高質(zhì)量圖像

        // 將 BufferedImage 轉(zhuǎn)換為 InputStream
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        ImageIO.write(bufferedImage, "PNG", byteArrayOutputStream);
        document.close();
        // 返回一個新的 InputStream
        return new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
    }
    public static byte[] streamToByte(InputStream inputStream) throws Exception {
        ByteArrayOutputStream buffer = new ByteArrayOutputStream();
        int nRead;
        byte[] data = new byte[1024];
        while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
            buffer.write(data, 0, nRead);
        }
        buffer.flush();
        return buffer.toByteArray();
    }

}