Spring Boot pdf文件转图片

PDF转图片工具类
亲测可以使用，无需下载其他jar包

pom.xml

        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>2.0.20</version>
        </dependency>

PDFToIMG.java

import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Iterator;
import java.util.List;

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageOutputStream;

import org.apache.pdfbox.exceptions.COSVisitorException;
import org.apache.pdfbox.pdfparser.PDFParser;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.springframework.stereotype.Component;

/**
 * @description: PDF转图片工具类
 * @author: LCHYUE
 * @time: 2021/6/15 13:35
 */
@Component
public class PDFToIMG {

    public final static String IMG_TYPE_JPG = "jpg";
    public final static String IMG_TYPE_PNG = "png";

//    public static void main(String[] args) throws IOException {
//        App app = new App();
//        app.pdf2img("D:\\测试文件.pdf", "D:", IMG_TYPE_PNG);
    		PDDocument pdDocument = app.pdfInfo("D:\\api.pdf");
//    }


    /**
     * @param pdfPath  pdf文件的路径
     * @param savePath 图片保存的地址
     */
    public void pdf2img(String pdfPath, String savePath) {
        //imgType  图片保存方式
        String imgType = IMG_TYPE_PNG;
//        String fileName = pdfPath.substring(pdfPath.lastIndexOf("\\") + 1, pdfPath.length());/*---window---*/
        String fileName = pdfPath.substring(pdfPath.lastIndexOf(File.separator) + 1, pdfPath.length());/*---linux---*/
        fileName = fileName.substring(0, fileName.lastIndexOf("."));
        InputStream is = null;
        PDDocument pdDocument = null;
        try {
            is = new BufferedInputStream(new FileInputStream(pdfPath));
            PDFParser parser = new PDFParser(is);
            parser.parse();
            pdDocument = parser.getPDDocument();
            List pages = pdDocument.getDocumentCatalog().getAllPages();
            for (int i = 0; i < pages.size(); i++) {
//                String saveFileName = savePath + "\\" + fileName + i + "." + imgType; /*---window---*/
                String saveFileName = savePath + File.separator + fileName + i + "." + imgType;/*---linux---*/
                PDPage page = (PDPage)pages.get(i);
                pdfPage2Img(page, saveFileName, imgType);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (pdDocument != null) {
                try {
                    pdDocument.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }


    }
    /**
     * pdf页转换成图片
     *
     * @param page
     * @param saveFileName
     * @throws IOException
     */
    public void pdfPage2Img(PDPage page, String saveFileName, String imgType) throws IOException {
        BufferedImage img_temp = page.convertToImage();
        Iterator it = ImageIO.getImageWritersBySuffix(imgType);
        ImageWriter writer = (ImageWriter) it.next();
        ImageOutputStream imageout = ImageIO.createImageOutputStream(new FileOutputStream(saveFileName));
        writer.setOutput(imageout);
        writer.write(new IIOImage(img_temp, null, null));
    }


    public PDDocument pdfInfo(String filePath) throws IOException {
        InputStream is = new BufferedInputStream(new FileInputStream(filePath));
        PDFParser parser = new PDFParser(is);
        parser.parse();
        PDDocument pdDocument = parser.getPDDocument();
        System.out.println("pageNum:" + pdDocument.getNumberOfPages());
        return pdDocument;
    }


    public void createPdf() throws COSVisitorException, IOException {
        PDDocument document = new PDDocument();
        PDPage blankPage = new PDPage();
        document.addPage(blankPage);
        document.save("D:\\test.pdf");
        document.close();
    }
}