multipartfile上传文件存入数据库详细代码

您好，以下是multipartfile上传文件存入数据库的详细代码示例：

@Controller
public class FileUploadController {

@Autowired
private FileStorageService fileStorageService;

@PostMapping("/uploadFile")
public String uploadFile(@RequestParam("file") MultipartFile file) {
String fileName = fileStorageService.storeFile(file);

return "redirect:/downloadFile/" + fileName;
}
}

@Service
public class FileStorageService {

@Autowired
private FileRepository fileRepository;

public String storeFile(MultipartFile file) {
String fileName = StringUtils.cleanPath(file.getOriginalFilename());

try {
if(fileName.contains("..")) {
throw new FileStorageException("Sorry! Filename contains invalid path sequence " + fileName);
}

FileEntity fileEntity = new FileEntity(fileName, file.getContentType(), file.getBytes());

fileRepository.save(fileEntity);

return fileName;
} catch (IOException ex) {
throw new FileStorageException("Could not store file " + fileName + ". Please try again!", ex);
}
}

public FileEntity getFile(String fileName) {
return fileRepository.findByFileName(fileName)
.orElseThrow(() -> new FileNotFoundException("File not found with name " + fileName));
}
}

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

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

@Column(nullable = false)
private String fileName;

@Column(nullable = false)
private String fileType;

@Lob
@Column(nullable = false)
private byte[] data;

public FileEntity() {

}

public FileEntity(String fileName, String fileType, byte[] data) {
this.fileName = fileName;
this.fileType = fileType;
this.data = data;
}

// getters and setters
}

请注意，这只是一个示例代码，实际应用中可能需要根据具体情况进行修改。