RestFull Services File Upload - rest

Question

My RestPictureServices Class
#Service
#TestProfile
public class RestPictureServices implements SahaPictureServices {
#Autowired
private PictureRepository pictureRepository;
#Autowired
private DozerBeanMapper mapper;
#Override
public Collection<SahaPicture> pictures() {
// TODO Auto-generated method stub
return null;
}
#Override
public SahaPicture pictureOfSaha(Long sahaId) {
// TODO Auto-generated method stub
return null;
}
#Override
public SahaPicture save(SahaPicture picture) {
SahaPictureEntity pictureEntity=new SahaPictureEntity();
mapper.map(picture, pictureEntity);
pictureRepository.save(pictureEntity);
SahaPicture savedPicture=new SahaPicture();
mapper.map(pictureEntity, savedPicture);
return savedPicture;
}
#Override
public Boolean delete(Long id) {
// TODO Auto-generated method stub
return true;
}
#Override
public SahaPicture update(Long id, SahaPicture picture) {
// TODO Auto-generated method stub
return null;
}
}
My SahaPictureController class
#JsonRestController
#RequestMapping(path = "/saha/picture")
public class PictureController {
#Autowired
#Qualifier("restPictureServices")
private SahaPictureServices pictureServices;
#RequestMapping(method = RequestMethod.POST)
public SahaPicture singleSave(#RequestBody SahaPicture picture) {
return pictureServices.save(picture);
}
}
My PictureSahaRepository interface
public interface PictureRepository extends CrudRepository<SahaPictureEntity,Long> {
}
My picture Model class
public class SahaPicture {
private MultipartFile file;
//getter and setter methods
}
This is SahaPictureEntity class
#Entity
#Table(name="SahaPicture")
public class SahaPictureEntity {
#Id
#GeneratedValue
private Long id;
#Column
#Lob
private MultipartFile file;
//getter and setter methods
}
My JsonRestController Annotation
#RestController
#RequestMapping(produces = MediaType.APPLICATION_JSON_VALUE)
#Retention(RetentionPolicy.RUNTIME)
public #interface JsonRestController {
}
My Services Interface
public interface SahaPictureServices {
Collection<SahaPicture> pictures();
SahaPicture pictureOfSaha(Long sahaId);
SahaPicture save(SahaPicture picture);
Boolean delete(Long id);
SahaPicture update(Long id, SahaPicture picture);
}
My Service Configuration Class using dozer mapping jar.
#Configuration
public class ServiceConfiguration {
#Bean
public DozerBeanMapper mapper() {
return new DozerBeanMapper();
}
}
How can I insert a file or an image to db with rest full services Spring boot. I am trying to restfull services to insert a file but I have got an error
Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Unexpected character ('-' (code 45)) in numeric value: expected digit (0-9) to follow minus sign, for valid numeric value
at [Source: java.io.PushbackInputStream#21d5ad7d; line: 1, column: 3]; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('-' (code 45)) in numeric value: expected digit (0-9) to follow minus sign, for valid numeric value
at [Source: java.io.PushbackInputStream#21d5ad7d; line: 1, column: 3]
The request and response is in below picture.
enter image description here

Answer 1

You will want to create a REST method that includes a MultipartFile parameter. That object has a getBytes() method as well as a getInputStream() method you can use to get the data. You can then create your object and save it to the repository.
See https://spring.io/guides/gs/uploading-files/ and http://www.concretepage.com/spring-4/spring-4-mvc-single-multiple-file-upload-example-with-tomcat as good references for how to upload files with Spring .
Here is an example on the front end of how I upload a file to a REST service using jQuery.
var token = $("meta[name='_csrf']").attr("content");
var header = $("meta[name='_csrf_header']").attr("content");
$.ajax({
url: "/restapi/requests/replay/upload",
type: "POST",
beforeSend: function (request)
{
request.setRequestHeader(header,token);
},
data: new FormData($("#upload-file-form")[0]),
enctype: 'multipart/form-data',
processData: false,
contentType: false,
cache: false,
success: function () {
// Handle upload success
addText( "File uploaded successfully.")
},
error: function () {
// Handle upload error
addText( "File upload error.")
}
});
Then here is what the Rest controller looks like:
#RestController
public class ReplayRestController {
#Autowired
private ApplicationContext applicationContext;
#RequestMapping(value="/restapi/requests/replay/upload", method = RequestMethod.POST)
#ResponseBody
public ResponseEntity<?> processUpload(
#RequestParam("uploadfile") MultipartFile uploadfile,
#RequestParam("databaseWriteIdUpload") String databaseWriteId,
#RequestParam("recordsToUse")ReplayUpload.RecordsToUse recordsToUse
) {
try {
String fileName = uploadfile.getOriginalFilename();
if (databaseWriteId == null || "".equals(databaseWriteId)) {
databaseWriteId = fileName;
}
ReplayUpload replayUpload = applicationContext.getBean( ReplayUpload.class );
replayUpload.process( uploadfile.getInputStream(), databaseWriteId, recordsToUse );
}
catch (Exception e) {
System.out.println(e.getMessage());
return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
}
return new ResponseEntity<>(HttpStatus.OK); }
}