How and where to add new bean in Sping application generated by Jhipster - spring

Question

I generated my Spring application using Jhipster. Now I want to add controller for FilesUpload, and StorageService for it. But when I run my application it gets me this message
Description:Parameter 0 of constructor in com.kongresspring.myapp.web.rest.FileUploadResource required a bean of type 'com.kongresspring.myapp.service.StorageService' that could not be found.
Action:Consider defining a bean of type 'com.kongresspring.myapp.service.StorageService' in your configuration.
I can't find beans.xml to add new bean. I'm new in spring, so maybe there's some other way to configure bean, I'm not familiar whit. Here's my code for uploading file controller:
package com.kongresspring.myapp.web.rest;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.core.io.Resource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import com.kongresspring.myapp.service.StorageService;
#RestController
#RequestMapping("/api")
public class FileUploadResource {
private final Logger log = LoggerFactory.getLogger(FileUploadResource.class);
private final StorageService storageService;
#Autowired
public FileUploadResource(StorageService storageService) {
this.storageService = storageService;
}
/**
* POST uploadFile
*/
#PostMapping("/upload-file")
public String uploadFile(#RequestParam("file") MultipartFile file,
RedirectAttributes redirectAttributes) {
storageService.store(file);
redirectAttributes.addFlashAttribute("message",
"You successfully uploaded " + file.getOriginalFilename() + "!");
return "success";
}
/**
* GET preview
*/
#GetMapping("/preview")
public String preview() {
return "preview";
}
}
And here's my StorageService code:
package com.kongresspring.myapp.service;
import org.springframework.core.io.Resource;
import org.springframework.web.multipart.MultipartFile;
import java.nio.file.Path;
import java.util.stream.Stream;
public interface StorageService {
void init();
void store(MultipartFile file);
Stream<Path> loadAll();
Path load(String filename);
Resource loadAsResource(String filename);
}

Answer 1

You can create an implementation for StorageService, and annotate it as #Service/#Component, spring will automatically discover the bean:
#Service
public class StorageServiceImpl implements StorageService {
void init(){// You code goes here/}
void store(MultipartFile file){///}
Stream<Path> loadAll(){///}
Path load(String filename){//}
Resource loadAsResource(String filename){///}
}