引入依赖：

<dependency><groupId>org.apache.pdfbox</groupId><artifactId>pdfbox</artifactId><version>2.0.25</version></dependency>

测试代码：

import io.choerodon.core.iam.ResourceLevel;
import io.choerodon.swagger.annotation.Permission;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.springframework.mock.web.MockMultipartFile;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;/*** <p>* description xxxx* </p>** @author liqin 2024/4/15 14:53*/
@RestController("TestOcrController.v1")
@RequestMapping("/v1/{organizationId}/ocr-test")
public class TestOcrController {@Permission(level = ResourceLevel.ORGANIZATION)@PostMappingpublic void ocrMain(@RequestParam("file") MultipartFile file) {String fileName = file.getOriginalFilename();System.out.println("文件类型：{}"+ fileName);String contentType = file.getContentType();System.out.println("contentType：{}"+ contentType);int dotIndex = fileName.lastIndexOf('.');String filePrefixName = "";String fileType = "";if (dotIndex != -1) {fileType = fileName.substring(dotIndex + 1).toLowerCase();filePrefixName = fileName.substring(0, fileName.lastIndexOf("."));}System.out.println("文件类型：{}"+ fileType);PDDocument doc = null;try (InputStream is = file.getInputStream()) {doc = PDDocument.load(is);int pageCount = doc.getNumberOfPages();System.out.println("pageCount:"+ pageCount);for (int i = 0; i < pageCount; i++) {// PDF 按页切割 还是生成pdf  ======================================================PDDocument outputDocument = new PDDocument();PDPage page = doc.getPage(i);outputDocument.addPage(page);try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {outputDocument.save(outputStream);byte[] bytes = outputStream.toByteArray();// 使用MockMultipartFile将byte[]转换为MultipartFileString newOriginalFilename = filePrefixName+"-"+(i+1)+"."+fileType;MockMultipartFile multipartFile = new MockMultipartFile("file",newOriginalFilename,"application/pdf",bytes);// 处理multipartFile，例如保存到磁盘或上传String path = "C:\\Users\\Administrator\\Desktop\\fileTest"+ File.separator +newOriginalFilename;multipartFile.transferTo(new File(path));}finally {try {if(outputDocument != null) {// 这里需要关闭PDDocument，不然如果想要删除pdf文件时会提示文件正在使用，无法删除的情况outputDocument.close();}} catch (IOException e) {e.printStackTrace();}}// PDF 每一页转图片 ======================================================
//                ByteArrayOutputStream opStream = new ByteArrayOutputStream();
//                PDFRenderer renderer = new PDFRenderer(doc);
//                BufferedImage image = renderer.renderImageWithDPI(i, 200, ImageType.ARGB);
//                ImageIO.write(image, "JPG", opStream);
//                String newOriginalFilename = filePrefixName+"-"+(i+1)+".jpg";
//                MultipartFile multipartFile = new MockMultipartFile("file",
//                        newOriginalFilename,
//                        "image/jpg", opStream.toByteArray());
//                System.out.println("新文件大小：{}"+ multipartFile.getSize());
//
//                // 处理multipartFile，例如保存到磁盘或上传
//                // 目标文件路径
//                String path = "C:\\Users\\Administrator\\Desktop\\fileTest"+ File.separator +newOriginalFilename;
//                System.out.println("地址：{}"+ path);
//                Path filePath = Paths.get(path);
//                // 将MultipartFile内容写入到目标文件
//                Files.copy(multipartFile.getInputStream(), filePath);}}catch (Exception e){e.printStackTrace();}finally {try {if(doc != null) {// 这里需要关闭PDDocument，不然如果想要删除pdf文件时会提示文件正在使用，无法删除的情况doc.close();}} catch (IOException e) {e.printStackTrace();}}}}