NullPointerException：null错误

Question

请帮帮我。当我运行我的应用时，不要显示任何错误。但是当我访问网址#define VARS(data, stride, a, b, c) \ MyStruct *a = &data.array[0], \ MyStruct *b = &data.array[1 * (stride)], \ MyStruct *c = &data.array[2 * (stride)]; 时。我收到内部服务器错误（localhost:8080/api/wines or localhost:8080/api/wines/1）。

我做错了什么？

这是我的Rest课程：

NullPointerException: null

}

我的WineServiceImplamatation类：

@RestController
@RequestMapping("/api")
public class VinhosRestController {

@Autowired
VinhosService vinhoService;

/* Retrieve all wines */
@RequestMapping(value = "/wines/", method = RequestMethod.GET)
public ResponseEntity<List<Vinho>> listAllWines() {
    List<Vinho> vinhos = vinhoService.findAllWines();
    if(vinhos.isEmpty()) {
        return new ResponseEntity<List<Vinho>>(HttpStatus.NO_CONTENT);
    }

    return new ResponseEntity<List<Vinho>>(vinhos, HttpStatus.OK);
}

/* Retrieve single wine */
@RequestMapping(value = "/wines/{id}", method = RequestMethod.GET,
        produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Vinho> getWine(@PathVariable("id") Long id) {
    Vinho vinho = vinhoService.findById(id);
    if(vinho == null) {
        return new ResponseEntity<Vinho>(vinho, HttpStatus.NOT_FOUND);
    }
    return new ResponseEntity<Vinho>(vinho, HttpStatus.OK);
}

我的界面服务类：

@Service("vinhoService")
@Transactional
public class VinhosServImp implements VinhosService {

private List<Vinho> vinhos;

public Vinho findById(Long id) {
    for(Vinho vinho : vinhos) {
        if(vinho.getCodigo() == id) {
            return vinho;
        }
    }
    return null;
}

@Override

public List<Vinho> findAllWines() {
    return vinhos;
}

我的日志：

public interface VinhosService {

    Vinho findById(Long id);
    List<Vinho> findAllWines();

}