将PDF转换为图片

<dependency>
	<groupId>com.lowagie</groupId>
	<artifactId>itext</artifactId>
	<version>2.1.7</version>
</dependency>
<!-- PDFBox -->
<dependency>
	<groupId>org.apache.pdfbox</groupId>
	<artifactId>pdfbox</artifactId>
	<version>2.0.24</version>
</dependency>
<!-- iText -->
<dependency>
	<groupId>com.itextpdf</groupId>
	<artifactId>itext7-core</artifactId>
	<version>7.1.15</version>
	<type>pom</type>
</dependency>

import lombok.extern.slf4j.Slf4j;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.rendering.ImageType;
import org.apache.pdfbox.rendering.PDFRenderer;
import org.jeecg.common.api.vo.Result;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.time.Instant;
@Slf4j
public class ImagesToPdfSort {
    /**
     * 将PDF转换为图片
     * @param pdfFile 需要转换的PDF文件
     */
    public static Result<?> pdfToImageExample(File pdfFile) {
        try {
            // 打开PDF文档
            PDDocument document = PDDocument.load(pdfFile);
            // 创建PDFRenderer对象
            PDFRenderer pdfRenderer = new PDFRenderer(document);
            int pageCount = document.getNumberOfPages();
            for (int pageIndex = 0; pageIndex < pageCount; pageIndex++) {
                // 渲染PDF页面到BufferedImage
                BufferedImage bim = pdfRenderer.renderImageWithDPI(pageIndex, 300, ImageType.RGB);
                // 构建输出文件路径
                // 获取保存文件的路径
                if(!new File("path/../..").exists()){
                    new File("path/../..").mkdir();
                }
                String fileName = "path/../.." + "/" + (pageIndex + 1) + Instant.now().toEpochMilli() + ".jpg";
                File outputFile = new File(fileName);
                // 将BufferedImage保存为JPG文件
                ImageIO.write(bim, "jpg", outputFile);
            }
            // 关闭PDF文档
            document.close();
        } catch (IOException e) {
            log.error(pdfFile.getName() + "PDF转图片失败！", e);
            return Result.error("PDF转图片失败");
        }
        return Result.ok("PDF转图片成功");
    }
}