Java client for the Linkshortener REST API

LinkController.java

@RestController
public class LinkController {
  private LinkService linkService;

  @Autowired
  public LinkController(LinkService linkService) {
    this.linkService = linkService;
  }

  @RequestMapping("/links")
  public Link createLink(@RequestParam(value = "longUrl") String longUrl) {
    return linkService.createLink(longUrl);
  }
}

LinkService.java

@Service
public class LinkServiceImpl implements LinkService {
  private RestTemplate restTemplate;

  @Autowired
  public LinkServiceImpl(RestTemplate restTemplate) {
    this.restTemplate = restTemplate;
  }

  @Override
  public Link createLink(String longUrl) {
    RestTemplate restTemplate = new RestTemplate();
    MultiValueMap<String, String> parameters = new LinkedMultiValueMap<>();
    parameters.add("url", longUrl);

    ResponseEntity<Link> response;
    Link result = null;
    try {
      response = restTemplate.postForEntity(
        "http://localhost:9080/api/v1/links",
        parameters,
        Link.class);

      if (HttpStatus.CREATED == response.getStatusCode() || HttpStatus.OK == response.getStatusCode()) {
        result = response.getBody();
      }

    } catch (RestClientException ex) {
      throw new RuntimeException(ex);
    }

    return result;
  }
}