避免在Spring数据Jpa中加载惰性集合

我有以下关系：

@Entity class Shop {
@OneToMany(mappedBy = "shop", fetch = LAZY)
private List<Employee> employees = new LinkedList<>();
}

我这样声明了Spring数据存储库：

public interface ShopRepository extends JpaRepository<Shop, Long> {}

} 服务方法在另一个控制器方法中调用：

@RequestMapping(value = "api/schedule/{shopId:[0-9]+}/{date:\\d{4}-\\d{2}-\\d{2}}", method = RequestMethod.GET)
@ResponseBody
public Schedule getSchedule(@PathVariable Long shopId,
                            @PathVariable @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate date) {
    Schedule schedule = scheduleService.findSchedule(shopId, date);
    if(schedule != null)
        return schedule;
    else {
        Shop shop = shopService.find(shopId);
        Schedule empty = new Schedule(shop, date);
        return empty;
    }
}

如何摆脱抓取

员工的关系？我找到了解决方案

实际上，我在实体上使用了@JsonManagedReference/@jsonbackreference来防止在封送到JSON时循环。这会导致获取延迟加载数据。
为了避免这种情况，您应该将
Hibernate4Module
添加到
MappingJackson2HttpMessageConverter

更多信息请参见本文：
除非代码中有明确触发加载的内容，否则我看不出情况会如何。显示调用repo的方法中的所有代码。@alanhay，我已经添加了调用repo的方法所涉及的代码。您使用的是Spring数据Rest吗。您的控制器是
@RepositoryRestController
？如果是：@alan，谢谢你的帮助。你的链接很有帮助。
@Service
@Transactional(readOnly = true)
public class ShopService {

private final ShopRepository shopRepository;

@Autowired
public ShopService(ShopRepository shopRepository) {
    this.shopRepository = shopRepository;
}
public Shop find(Long id) {
    return shopRepository.findOne(id);
}

@RequestMapping(value = "api/schedule/{shopId:[0-9]+}/{date:\\d{4}-\\d{2}-\\d{2}}", method = RequestMethod.GET)
@ResponseBody
public Schedule getSchedule(@PathVariable Long shopId,
                            @PathVariable @DateTimeFormat(pattern = "yyyy-MM-dd") LocalDate date) {
    Schedule schedule = scheduleService.findSchedule(shopId, date);
    if(schedule != null)
        return schedule;
    else {
        Shop shop = shopService.find(shopId);
        Schedule empty = new Schedule(shop, date);
        return empty;
    }
}