pdf转化为图片并且把图片纵向拼接在一起java代码示例

pdf转化为图片并且把图片纵向拼接在一起java代码示例

import cn.hutool.core.io.FileUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.PDFRenderer;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

/**
 * @author No One
 * @description:
 * @date 2022/12/9 15:55
 */
@Slf4j
public class PdfUtilsTest {
    
    /**
     * 根据http路径下载 pdf并转化为图片
     */
    public static BufferedImage pdf2BufferedImageByFileAndMerge(String path,boolean isHorizontal,int dpi) {
        // 将pdf装图片 并且自定义图片得格式大小
        PDDocument doc = null;
        try {
            byte[] bytes = FileUtil.readBytes(new File(path));
            doc = PDDocument.load(bytes);
            PDFRenderer renderer = new PDFRenderer(doc);
            int pageCount = doc.getNumberOfPages();
            log.info("pdf 总页码为：{}",pageCount);
            List<BufferedImage> imagesList = new ArrayList<>();
            for (int i = 0; i < pageCount; i++) {
                BufferedImage image = renderer.renderImageWithDPI(i, dpi);
                imagesList.add(image);
            }
            return MergeImage.mergeImage(isHorizontal, imagesList);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                if (doc != null) {
                    doc.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    public static void main(String[] args) throws IOException {
        String path = "D:\\项目资料\\2024共有产权房资料\\社保证明.pdf";
        BufferedImage bufferedImage = pdf2BufferedImageByFileAndMerge(path,false,300);
        ImageIO.write(bufferedImage, "jpg", new File("D:\\项目资料\\2024共有产权房资料\\社保证明.jpg"));
    }
}