我需要流式傳輸對象列表，但是當我使用 JpaRepository 和 @Query 嘗試它時，我收到此異常：Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'MainApplication': Unsatisfied dependency expressed through field 'service'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'MyServiceImpl': Unsatisfied dependency expressed through field 'myDAO'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'MyDAO': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.stream.Stream com.my.package.dao.MyDAO.streamAll()!MyDAO 代碼：@Repositorypublic interface MyDAO extends JpaRepository<MyEntity, Long> { @QueryHints(value = @QueryHint(name = HINT_FETCH_SIZE, value = "" + Integer.MIN_VALUE)) @Query(value = "SELECT m FROM MyEntity m") Stream<MyEntity> streamAll(); ...}主要代碼：@SpringBootApplication@ComponentScan("com.my.package.*")@EntityScan("com.my.package.*")@Configuration@EnableAutoConfigurationpublic class MainApplication implements CommandLineRunner { @Autowired MyServiceInterface service; public static void main(String[] args) { SpringApplication.run(MainApplication.class, args); } @Override public void run(String... args) throws Exception { try { service.createCsv(); } catch (RuntimeException e) { System.out.println(e); } }}我已經嘗試了一切，但沒有任何效果，請幫助我！
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TA貢獻2011條經驗 獲得超2個贊
您將無法使用，Stream<MyEntity> findAll();因為JpaRepository已經定義了具有List返回類型的方法，因此您可以像這樣重命名方法Stream<MyEntity> getAll();或使用 Ordering 將方法重命名為Stream<MyEntity> findAllByOrderByIdAsc();.
拉丁的傳說
TA貢獻1789條經驗 獲得超8個贊
只需刪除
@Query(value = "SELECT m FROM MyEntity m")
并使用 JPARepository 的 findAll() 方法，如下所示
Stream<MyEntity> findAll();
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