Question

在我的应用程序中，我使用Spring Data和hibernate作为JPA提供程序来持久化和读取数据。

我有顶级实体类：

@Entity
@Getter @Setter
@Table(name = "operation")
@Inheritance(strategy = InheritanceType.JOINED)
@EqualsAndHashCode(of = {"operationId"})
public abstract class Operation implements Serializable {
    public static final int OPERATION_ID_LENGTH = 20;

    @Id
    @Column(name = "operation_id", length = OPERATION_ID_LENGTH, nullable = false, columnDefinition = "char")
    private String operationId;

    @Column(name = "operation_type_code")
    @Getter(AccessLevel.NONE)
    @Setter(AccessLevel.NONE)
    private String operationTypeCode;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "begin_timestamp", nullable = false)
    private Date beginTimestamp = new Date();

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "end_timestamp")
    private Date endTimestamp;

    @Column(name = "operation_number", length = 6, columnDefinition = "char")
    private String operationNumber;


    @Enumerated(EnumType.STRING)
    @Column(name = "operation_status", length = 32, nullable = false)
    private OperationStatus status;

    @ManyToOne(optional = false)
    @JoinColumn(name = "user_id")
    private User user;

    @ManyToOne
    @JoinColumn(name = "terminal_id")
    private Terminal terminal;


    @Column(name = "training_mode", nullable = false)
    private boolean trainingMode;
}

对于继承的类，我有相应的存储库：

public interface ConcreteOperationRepository extends JpaRepository<ConcreteOperation, String> {

    @Query("SELECT o FROM ConcreteOperation o WHERE o.beginTimestamp BETWEEN :from AND :to AND o.status = :status AND o.terminal.deviceId = :deviceId AND o.trainingMode = :trainingMode")
    Collection<ConcreteOperation> findOperations(@Param("from") Date startDay,
                                                   @Param("to") Date endDay,
                                                   @Param("status") OperationStatus status,
                                                   @Param("deviceId") String deviceId,
                                                   @Param("trainingMode") boolean trainingMode);
}

我使用以下方法进行集成测试：

@Transactional
@Test
public void shouldFindOperationByPeriodAndStatusAndWorkstationId() {
    Date from = new Date(Calendar.getInstance().getTime().getTime());
    List<String> terminalIds = loadTerminalIds();
    List<OperationStatus> typeForUse = Arrays.asList(OperationStatus.COMPLETED,
            OperationStatus.LOCKED, OperationStatus.OPEN);
    int countRowsForEachType = 3;
    int id = 100001;
    for (String terminalId : terminalIds) {
        for (OperationStatus status : typeForUse) {
            for (int i = 0; i < countRowsForEachType; i++) {
                concreteOperationRepository.save(createConcreteOperation(status, terminalId,
                        String.valueOf(++id)));
            }
        }
    }
    Date to = new Date(Calendar.getInstance().getTime().getTime());
    for (String terminalId : terminalIds) {
        for (OperationStatus status : typeForUse) {
            Collection<ConcreteOperation> operations =
                    concreteOperationRepository.findOperations(from, to, status, terminalId, false);
            assertEquals(countRowsForEachType, operations.size());
        }
    }
}

但是当我使用MySql数据库时由于结果为空而导致此测试失败（但在切换到HSQLDB时通过）

此外，如果我在测试开始时将延迟“Thread.sleep（1000）”延迟一秒，就在第一行之后，此测试通过。

当我从Hibernate日志执行SQL时，它给了我正确的结果。我的代码出了什么问题？

Answer 1

在JPA中，Date需要时间提示。通常，您可以在设置JPA TemporalType参数时设置Query：

query.setParameter("from", from), TemporalType.TIMESTAMP);

使用Spring Data，您需要使用@Temporal注释，因此您的查询将变为：

@Query("SELECT o FROM ConcreteOperation o WHERE o.beginTimestamp BETWEEN :from AND :to AND o.status = :status AND o.terminal.deviceId = :deviceId AND o.trainingMode = :trainingMode")
Collection<ConcreteOperation> findOperations(
    @Param("from") @Temporal(TemporalType.TIMESTAMP) Date startDay,
    @Param("to") @Temporal(TemporalType.TIMESTAMP) Date endDay,
    @Param("status") OperationStatus status,
    @Param("deviceId") String deviceId,
    @Param("trainingMode") boolean trainingMode
);

Answer 2

我意识到了自己的问题。问题是由于MySql中的字段类型（默认时间戳精确切割毫秒）与Java日期（以毫秒为单位）之间的精度差异造成的我改变了我的桌子：

ALTER TABLE transaction modify end_timestamp TIMESTAMP(6)

这解决了我的问题。

使用Date参数时Spring Data JPA日期“之间”查询问题

2 个答案: