我使用 Spring Boot 并通過多個模塊進行設計。下面是我的項目結構：模塊商店核心：包名稱：com.baotrung.core.business 我設計了一些子包：模型，存儲庫，服務行長：<modelVersion>4.0.0</modelVersion>    <artifactId>shop-core</artifactId>    <packaging>jar</packaging>    <dependencies>        <!-- shop-core-model !-->        <dependency>            <groupId>com.baotrung</groupId>            <artifactId>shop-core-model</artifactId>            <version>0.0.1-SNAPSHOT</version>        </dependency>        <dependency>            <groupId>org.apache.commons</groupId>            <artifactId>commons-lang3</artifactId>            <version>3.9</version>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-data-jpa</artifactId>        </dependency>    </dependencies>類別服務 public interface CategoryService {    List<Object> countProductsByCategories(MerchantStore store, List<Long> categoryIds);    List<Category> listByStoreAndParent(MerchantStore store, Category category);    PersistableCategory saveCategories(MerchantStore store, PersistableCategory persistableCategory);    Category findById(Long id);    List<ReadableCategory> findCategories(MerchantStore store, int dept, Language language,List<String> filters);}類別 服務實施@Servicepublic class CategoryServiceImpl implements CategoryService {    @Autowired    private CategoriesRepository categoryRepository;    @Autowired    private LanguageRepository languageRepository;    @Autowired    private Mapper<Category,ReadableCategory> categoryReadableCategoryMapper;    //some method@存儲庫public interface CategoriesRepository extends CrudRepository<Category, Long>, CategoryRepositoryCustom { }public interface CategoryRepositoryCustom {    List<Object> countProductsByCategories(MerchantStore store, List<Long> categoryIds);    List<Category> listByStoreAndParent(MerchantStore store, Category category);    }@Repositorypublic class CategoryRepositoryCustomImpl implements CategoryRepositoryCustom {// some method impl}