Springboot实现PDF图片上传到服务器并保存路径到数据库完整代码

非常感谢您的提问！以下是Springboot实现PDF图片上传到服务器并保存路径到数据库的完整代码：

@Controller
public class FileUploadController {

@Autowired
private FileUploadService fileUploadService;

@PostMapping("/upload")
public String uploadFile(@RequestParam("file") MultipartFile file, Model model) {
String fileName = StringUtils.cleanPath(file.getOriginalFilename());
String fileType = file.getContentType();
String fileExtension = FilenameUtils.getExtension(fileName);

if (fileType.equals("application/pdf") && fileExtension.equals("pdf")) {
try {
String filePath = fileUploadService.saveFile(file);
model.addAttribute("message", "File uploaded successfully!");
model.addAttribute("filePath", filePath);
} catch (IOException e) {
model.addAttribute("message", "File upload failed: " + e.getMessage());
}
} else {
model.addAttribute("message", "Please upload a PDF file!");
}

return "uploadStatus";
}
}

@Service
public class FileUploadService {

@Value("${file.upload-dir}")
private String uploadDir;

@Autowired
private FileRepository fileRepository;

public String saveFile(MultipartFile file) throws IOException {
String fileName = StringUtils.cleanPath(file.getOriginalFilename());
String filePath = uploadDir + "/" + fileName;

File newFile = new File(filePath);
newFile.getParentFile().mkdirs();
file.transferTo(newFile);

FileEntity fileEntity = new FileEntity();
fileEntity.setFileName(fileName);
fileEntity.setFilePath(filePath);
fileRepository.save(fileEntity);

return filePath;
}
}

@Entity
@Table(name = "files")
public class FileEntity {

@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;

@Column(name = "file_name")
private String fileName;

@Column(name = "file_path")
private String filePath;

// getters and setters
}

在这个代码中，我们使用了Springboot的MultipartFile来处理上传的文件，然后通过FileUploadService将文件保存到服务器上，并将文件路径保存到数据库中。同时，我们也对上传的文件进行了一些限制，只允许上传PDF文件。如果上传的文件不符合要求，我们会返回一个错误信息。