java实现将PDF文件拆分成图片_java pdf 拆分图片

利用java实现将PDF文件拆分成图片

实现代码如下：

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

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * @Description pdf工具类
 * @ClassName PdfUtils
 * @Author yuhuofei
 * @Date 2022/3/16 20:21
 * @Version 1.0
 */
public class PdfUtils {

    /**
     * 将PDF文档拆分成多张图片，并返回所有图片的路径
     *
     * @param pdfPath
     * @param pictureFolderPath
     * @return
     * @throws Exception
     */
    public static List<String> pdfSwitchToPicture(String pdfPath, String pictureFolderPath) throws Exception {
        List<String> picUrlList = new ArrayList<>();
        File file = new File(pictureFolderPath);
        if (!file.exists()) {
            file.mkdirs();
        }
        String pictureRootName = file.getName() + "_";
        List<byte[]> imageList = handlePdf(pdfPath);
        AtomicInteger pictureNameNumber = new AtomicInteger(1);
        for (byte[] image : imageList) {
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            byteArrayOutputStream.write(image);
            String pictureUrl = file.getAbsolutePath() + File.separator + pictureRootName + pictureNameNumber.getAndIncrement() + ".jpg";
            byteArrayOutputStream.writeTo(new FileOutputStream(pictureUrl));
            picUrlList.add(pictureUrl);
            byteArrayOutputStream.close();
        }
        return picUrlList;
    }

    /**
     * 处理PDF文档
     *
     * @param pdfPath
     * @return
     * @throws Exception
     */
    public static List<byte[]> handlePdf(String pdfPath) throws Exception {
        File pdfFile = new File(pdfPath);
        //加载PDF文档
        PDDocument pdDocument = PDDocument.load(pdfFile);
        //创建PDF渲染器
        PDFRenderer pdfRenderer = new PDFRenderer(pdDocument);
        int pageNum = pdDocument.getNumberOfPages();
        List<byte[]> list = new ArrayList<>();
        for (int i = 0; i < pageNum; i++) {
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            //将PDF的每一页渲染成一张图片，并放大1.5倍
            BufferedImage image = pdfRenderer.renderImage(i, 1.5F);
            ImageIO.write(image, "jpg", outputStream);
            list.add(outputStream.toByteArray());
            outputStream.close();
        }
        pdDocument.close();
        return list;
    }

}

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需要引入的jar包：

<dependency>
     <groupId>org.apache.pdfbox</groupId>
     <artifactId>pdfbox</artifactId>
     <version>2.0.24</version>
</dependency>
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