由于某些未知原因，在编写了一些新代码后，我无法自动导入导致Date = Now - 7 days的存储库。一切都工作得很好，但不知从哪里停止。从那以后我一直无法解决这个问题。
重要的是autowired停止在这个特定的服务类中工作，除了它工作得很好。
控制器类：
NullPointerException服务类：
@Controller
public class AccountController {
/**
* Display account page based on given module and action.
*
* @param aModule Account module
* @param aAction Module action
* @param principal Logged user
* @return ModelAndView instance with required objects
* @throws podraza.piotr.eshopper.exception.NotFoundException
*/
@RequestMapping(value = "/account/{module}/{action}", method = RequestMethod.GET)
public ModelAndView displayAccount(
final @PathVariable("module") String aModule,
final @PathVariable("action") String aAction,
final Principal principal) throws NotFoundException {
if(aModule == null || aAction == null) {
throw new NotFoundException();
}
final Module module;
final Action action;
try {
module = Module.valueOf(aModule.toUpperCase());
action = Action.valueOf(aAction.toUpperCase());
} catch(RuntimeException ex) {
throw new NotFoundException();
}
switch(module) {
case USER:
throw new NotFoundException();
case ITEMS:
switch(action) {
case NEW:
return prepareItemNew();
case MANAGER:
return prepareItemManager();
default:
throw new NotFoundException();
}
case SHOPPING:
switch(action) {
case BIDS:
return prepareShoppingBids(principal);
default:
throw new NotFoundException();
}
default:
throw new NotFoundException();
}
}
/**
*
* @return
* @throws UserNotFoundException
*/
@RequestMapping(value = "/account", method = RequestMethod.GET)
public String displayShoppingBids() throws UserNotFoundException {
return "redirect:/account/shopping/bids";
}
/**
*
* @param form
* @param result
* @param request
* @param errors
* @param session
* @param principal
* @return
*/
@RequestMapping(value = "/account/item/new", method = RequestMethod.POST)
public ModelAndView processCreatingNewItem(
final @ModelAttribute("newItemForm") @Validated NewItemForm form,
final BindingResult result,
final WebRequest request,
final Errors errors,
final HttpSession session,
final Principal principal) {
LOGGER.debug("Proccessing creating new item. Given form: " + form);
ModelAndView mv = new ModelAndView("redirect:/account/items/manager");
if(result.hasErrors()) {
Set errorCodes = new HashSet();
for(ObjectError error : result.getAllErrors()) {
errorCodes.add(error.getCode());
}
mv.addObject("errorCodes", errorCodes);
mv.setViewName("account-items-new");
return mv;
}
accountService.addNewItem(form, principal);
return mv;
}
/**
* Prepare ModelAndView instance with containing required objects
* to perform action of adding new item.
* @return ModelAndView instance with required models.
*/
private ModelAndView prepareItemNew() {
return new ModelAndView("account-items-new")
.addObject("newItemForm", new NewItemForm())
.addObject("formCategories", accountService.getCategoriesForNewItemForm());
}
/**
*
* @return
*/
private ModelAndView prepareItemManager() {
return new ModelAndView("account-items-manager");
}
/**
*
* @param principal
* @return
* @throws UserNotFoundException
*/
private ModelAndView prepareShoppingBids(final Principal principal) throws UserNotFoundException {
ModelAndView mv = new ModelAndView("account-shopping-bids");
mv.addObject("bids", accountService.getUserBids(principal.getName()));
return mv;
}
/**
*
*/
private enum Module {
USER,
ITEMS,
SHOPPING
}
/**
*
*/
private enum Action {
MESSAGES,
SUBSCRIPTIONS,
PASSWORD,
NEW,
MANAGER,
BIDS
}
@Autowired
private AccountService accountService;
private static final Logger LOGGER = Logger.getLogger(AccountController.class);
}
@Service
@Transactional(rollbackFor = Exception.class)
public class AccountService {
/**
*
* @param username
* @return
*/
@Transactional(readOnly = true)
public final List<BidDto> getUserBids(final String username) {
LOGGER.debug("Fetching bids for user: " + username);
final User user = userRepository.findByAccountLogin(username);
final List<Bid> userBids = user.getBids();
return prepareUserBids(userBids);
}
/**
*
* @return
*/
@Transactional(readOnly = true)
public final List<Category> getCategoriesForNewItemForm() {
return categoryRepository.findCategoriesWithoutParent();
}
/**
*
* @param form
* @param principal
*/
public final void addNewItem(final NewItemForm form, final Principal principal) {
final Auction auction = auctionConverter.convertToEntity(form);
final Item item = auction.getItem();
final User owner = userRepository.findByAccountLogin(principal.getName());
item.setOwner(owner);
itemRepository.save(item);
}
/**
* Convert entity bid objects into DTOs and shorten auction names.
* @param bids
* @return
*/
private List<BidDto> prepareUserBids(final List<Bid> bids) {
final List<BidDto> bidsDto = new ArrayList<>();
for(Bid bid : bids) {
BidDto bidDto = bidConverter.convertToDto(bid);
String auctionName = bidDto.getAuction().getName();
if(auctionName.length() > BIDS_AUCTION_MAX_LENGTH) {
String shortenName = auctionName.substring(0, BIDS_AUCTION_MAX_LENGTH) + "...";
bidDto.getAuction().setName(shortenName);
}
bidsDto.add(bidDto);
}
return bidsDto;
}
private static final int BIDS_AUCTION_MAX_LENGTH = 25;
private static final Logger LOGGER = Logger.getLogger(AccountService.class);
@Autowired
private UserRepository userRepository;
@Autowired
private CategoryRepository categoryRepository;
@Autowired
private ItemRepository itemRepository;
@Autowired
private BidConverter bidConverter;
@Autowired
private AuctionConverter auctionConverter;
}
和UserReporitory都没有自动装配，并且都抛出CategoryRepository。
存储库：
NullPointerException堆栈追踪：
@Repository
@Transactional(propagation = Propagation.MANDATORY)
public interface UserRepository extends JpaRepository<User, Long> {
public User findByAccountLogin(final String login);
public User findByAccountLoginOrAccountEmail(final String login, final String email);
@Query("SELECT u FROM User u WHERE UPPER(u.account.login) LIKE UPPER('%'||:phrase||'%')")
public List<User> findUsersByPhrase(final @Param("phrase") String phrase);
}
@Repository
@Transactional(propagation = Propagation.MANDATORY)
public interface CategoryRepository extends JpaRepository<Category, Long> {
/**
* Looking for categories with that has no subcategories.
* @return list of categories
*/
@Query("SELECT c FROM Category c WHERE parent_id IS NULL ORDER BY c.id")
public List<Category> findMainCategories();
/**
* Looking for categories with given url value.
* @param url
* @return Category with given name
*/
public Category findByUrl(final String url);
/**
* Looking for categories without parent category.
* @return
*/
@Query("SELECT c FROM Category c WHERE parent_id IS NOT NULL")
public List<Category> findCategoriesWithoutParent();
public Category findByName(final String name);
}
任何想法可能导致这个问题？如果需要，我很乐意提供任何进一步的信息。
提前致谢。