java - Hibernate 不更新数据库(尽管它提交并读取它)

Question

我没有异常(exception)，一切似乎都很好，但是在将一些数据插入数据库后，它不会持续存在。我不知道我是否需要一些特定的注释，或者我在某些 Spring 配置中失败了。

实体bean:

@Entity
@Table(name="IMAGEN")
public class Imagen {

    @Id
    @Column(name="ID")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @Column(name="NOMBRE",
            nullable = false)
    private String nombre;

    @Column(name="CATEGORIA",
            nullable = false)
    private String categoria;

    //Getters and setters...

表的 SQL 脚本:

CREATE TABLE IMAGEN(
ID INTEGER IDENTITY PRIMARY KEY,
NOMBRE VARCHAR(64) NOT NULL,
CATEGORIA VARCHAR(32)
);

图像存储库:

@Repository
public interface RepositorioImagen extends JpaRepository<Imagen,Integer> {}

图像服务:

@Service
public class ServicioImagen {

    @Autowired RepositorioImagen repo;

    public List<Imagen> getAll(){
        return repo.findAll();
    }

    public void saveImage(Imagen im) {
        repo.save(im);
    }

和 Controller :

@Controller
public class Controlador {
    @Autowired private ServicioImagen servicioImagen;

    private void someMethod(){
        servicioImagen.getAll().forEach(e -> System.out.println(e));

        Imagen imagen = new Imagen();
        imagen.setNombre("SOMENAME");
        servicioImagen.saveImage(imagen);

        servicioImagen.getAll().forEach(e -> System.out.println(e));
    }

}

我在创建数据库时在表中插入了一些默认记录，并且方法getAll()很好地检索了它们，但是当我save()一个新的bean时，它不会持久保存在数据库中(getAll() 检索与以前相同的信息)。我读到this答案打开记录器，然后我发现 Hibernate 甚至提交了查询。我不知道还要做什么，这是插入的日志:

2020-03-07 18:33:55.611 TRACE 1236 --- [lication Thread] .i.SessionFactoryImpl$SessionBuilderImpl : Opening Hibernate Session.  tenant=null, owner=null
2020-03-07 18:33:55.612 TRACE 1236 --- [lication Thread] o.h.s.i.AbstractServiceRegistryImpl      : Initializing service [role=org.hibernate.resource.transaction.spi.TransactionCoordinatorBuilder]
2020-03-07 18:33:55.612 TRACE 1236 --- [lication Thread] o.h.s.i.AbstractServiceRegistryImpl      : Initializing service [role=org.hibernate.stat.spi.StatisticsImplementor]
2020-03-07 18:33:55.612 DEBUG 1236 --- [lication Thread] o.h.stat.internal.StatisticsInitiator    : Statistics initialized [enabled=false]
2020-03-07 18:33:55.613 TRACE 1236 --- [lication Thread] org.hibernate.internal.SessionImpl       : Opened Session [1956899b-7cc9-4f6a-bb51-5b45abbfed69] at timestamp: 15836024356
2020-03-07 18:33:55.616 DEBUG 1236 --- [lication Thread] o.h.e.t.internal.TransactionImpl         : begin
2020-03-07 18:33:55.616 TRACE 1236 --- [lication Thread] j.i.AbstractLogicalConnectionImplementor : Preparing to begin transaction via JDBC Connection.setAutoCommit(false)
2020-03-07 18:33:55.616 TRACE 1236 --- [lication Thread] j.i.AbstractLogicalConnectionImplementor : Transaction begun via JDBC Connection.setAutoCommit(false)
2020-03-07 18:33:55.617 TRACE 1236 --- [lication Thread] cResourceLocalTransactionCoordinatorImpl : ResourceLocalTransactionCoordinatorImpl#afterBeginCallback
2020-03-07 18:33:55.622 TRACE 1236 --- [lication Thread] .i.SessionFactoryImpl$SessionBuilderImpl : Opening Hibernate Session.  tenant=null, owner=null
2020-03-07 18:33:55.623 TRACE 1236 --- [lication Thread] org.hibernate.internal.SessionImpl       : Opened Session [ac23f2c2-d709-4a5e-a206-68fe3e65bd51] at timestamp: 15836024356
2020-03-07 18:33:55.626 DEBUG 1236 --- [lication Thread] o.h.e.i.DefaultMergeEventListener        : EntityCopyObserver strategy: disallow
2020-03-07 18:33:55.629 TRACE 1236 --- [lication Thread] o.hibernate.engine.spi.IdentifierValue   : ID unsaved-value: null
2020-03-07 18:33:55.630 TRACE 1236 --- [lication Thread] o.h.e.i.AbstractSaveEventListener        : Detached instance of: com.bcadaval.memefinder3020.modelo.beans.Imagen
2020-03-07 18:33:55.630 TRACE 1236 --- [lication Thread] o.h.e.i.DefaultMergeEventListener        : Merging detached instance
2020-03-07 18:33:55.639 TRACE 1236 --- [lication Thread] o.h.e.internal.DefaultLoadEventListener  : Loading entity: [com.bcadaval.memefinder3020.modelo.beans.Imagen#5]
2020-03-07 18:33:55.639 TRACE 1236 --- [lication Thread] o.h.e.internal.DefaultLoadEventListener  : Attempting to resolve: [com.bcadaval.memefinder3020.modelo.beans.Imagen#5]
2020-03-07 18:33:55.639 TRACE 1236 --- [lication Thread] o.h.e.internal.DefaultLoadEventListener  : Object not resolved in any cache: [com.bcadaval.memefinder3020.modelo.beans.Imagen#5]
2020-03-07 18:33:55.639 TRACE 1236 --- [lication Thread] o.h.p.entity.AbstractEntityPersister     : Fetching entity: [com.bcadaval.memefinder3020.modelo.beans.Imagen#5]
2020-03-07 18:33:55.639 DEBUG 1236 --- [lication Thread] org.hibernate.loader.Loader              : Loading entity: [com.bcadaval.memefinder3020.modelo.beans.Imagen#5]
2020-03-07 18:33:55.649 DEBUG 1236 --- [lication Thread] org.hibernate.SQL                        : select imagen0_.ID as ID1_1_1_, imagen0_.CATEGORIA as CATEGORI2_1_1_, imagen0_.NOMBRE as NOMBRE3_1_1_, etiquetas1_.IDIMAGEN as IDIMAGEN1_2_3_, etiqueta2_.ID as IDETIQUE2_2_3_, etiqueta2_.ID as ID1_0_0_, etiqueta2_.NOMBRE as NOMBRE2_0_0_ from IMAGEN imagen0_ left outer join IMAGEN_ETIQUETA etiquetas1_ on imagen0_.ID=etiquetas1_.IDIMAGEN left outer join ETIQUETA etiqueta2_ on etiquetas1_.IDETIQUETA=etiqueta2_.ID where imagen0_.ID=?
2020-03-07 18:33:55.654 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Registering statement [org.hsqldb.jdbc.JDBCPreparedStatement@2673b10e[sql=[select imagen0_.ID as ID1_1_1_, imagen0_.CATEGORIA as CATEGORI2_1_1_, imagen0_.NOMBRE as NOMBRE3_1_1_, etiquetas1_.IDIMAGEN as IDIMAGEN1_2_3_, etiqueta2_.ID as IDETIQUE2_2_3_, etiqueta2_.ID as ID1_0_0_, etiqueta2_.NOMBRE as NOMBRE2_0_0_ from IMAGEN imagen0_ left outer join IMAGEN_ETIQUETA etiquetas1_ on imagen0_.ID=etiquetas1_.IDIMAGEN left outer join ETIQUETA etiqueta2_ on etiquetas1_.IDETIQUETA=etiqueta2_.ID where imagen0_.ID=?], parameters=[[null]]]]
2020-03-07 18:33:55.655 TRACE 1236 --- [lication Thread] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Registering last query statement [org.hsqldb.jdbc.JDBCPreparedStatement@2673b10e[sql=[select imagen0_.ID as ID1_1_1_, imagen0_.CATEGORIA as CATEGORI2_1_1_, imagen0_.NOMBRE as NOMBRE3_1_1_, etiquetas1_.IDIMAGEN as IDIMAGEN1_2_3_, etiqueta2_.ID as IDETIQUE2_2_3_, etiqueta2_.ID as ID1_0_0_, etiqueta2_.NOMBRE as NOMBRE2_0_0_ from IMAGEN imagen0_ left outer join IMAGEN_ETIQUETA etiquetas1_ on imagen0_.ID=etiquetas1_.IDIMAGEN left outer join ETIQUETA etiqueta2_ on etiquetas1_.IDETIQUETA=etiqueta2_.ID where imagen0_.ID=?], parameters=[[null]]]]
2020-03-07 18:33:55.658 TRACE 1236 --- [lication Thread] o.h.type.descriptor.sql.BasicBinder      : binding parameter [1] as [INTEGER] - [5]
2020-03-07 18:33:55.659 TRACE 1236 --- [lication Thread] org.hibernate.loader.Loader              : Bound [2] parameters total
2020-03-07 18:33:55.661 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Registering result set [org.hsqldb.jdbc.JDBCResultSet@20fd1f60]
2020-03-07 18:33:55.662 TRACE 1236 --- [lication Thread] org.hibernate.loader.Loader              : Processing result set
2020-03-07 18:33:55.662 TRACE 1236 --- [lication Thread] org.hibernate.loader.Loader              : Done processing result set (0 rows)
2020-03-07 18:33:55.663 TRACE 1236 --- [lication Thread] org.hibernate.loader.Loader              : Total objects hydrated: 0
2020-03-07 18:33:55.665 TRACE 1236 --- [lication Thread] o.h.e.loading.internal.LoadContexts      : Constructing collection load context for result set [org.hsqldb.jdbc.JDBCResultSet@20fd1f60]
2020-03-07 18:33:55.667 DEBUG 1236 --- [lication Thread] o.h.e.l.internal.CollectionLoadContext   : No collections were found in result set for role: com.bcadaval.memefinder3020.modelo.beans.Imagen.etiquetas
2020-03-07 18:33:55.668 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Releasing statement [org.hsqldb.jdbc.JDBCPreparedStatement@2673b10e[sql=[select imagen0_.ID as ID1_1_1_, imagen0_.CATEGORIA as CATEGORI2_1_1_, imagen0_.NOMBRE as NOMBRE3_1_1_, etiquetas1_.IDIMAGEN as IDIMAGEN1_2_3_, etiqueta2_.ID as IDETIQUE2_2_3_, etiqueta2_.ID as ID1_0_0_, etiqueta2_.NOMBRE as NOMBRE2_0_0_ from IMAGEN imagen0_ left outer join IMAGEN_ETIQUETA etiquetas1_ on imagen0_.ID=etiquetas1_.IDIMAGEN left outer join ETIQUETA etiqueta2_ on etiquetas1_.IDETIQUETA=etiqueta2_.ID where imagen0_.ID=?], parameters=[[5]]]]
2020-03-07 18:33:55.668 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Closing result set [org.hsqldb.jdbc.JDBCResultSet@20fd1f60]
2020-03-07 18:33:55.684 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Closing prepared statement [org.hsqldb.jdbc.JDBCPreparedStatement@2673b10e[sql=[select imagen0_.ID as ID1_1_1_, imagen0_.CATEGORIA as CATEGORI2_1_1_, imagen0_.NOMBRE as NOMBRE3_1_1_, etiquetas1_.IDIMAGEN as IDIMAGEN1_2_3_, etiqueta2_.ID as IDETIQUE2_2_3_, etiqueta2_.ID as ID1_0_0_, etiqueta2_.NOMBRE as NOMBRE2_0_0_ from IMAGEN imagen0_ left outer join IMAGEN_ETIQUETA etiquetas1_ on imagen0_.ID=etiquetas1_.IDIMAGEN left outer join ETIQUETA etiqueta2_ on etiquetas1_.IDETIQUETA=etiqueta2_.ID where imagen0_.ID=?], parameters=[[5]]]]
2020-03-07 18:33:55.686 TRACE 1236 --- [lication Thread] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Starting after statement execution processing [ON_CLOSE]
2020-03-07 18:33:55.686 TRACE 1236 --- [lication Thread] o.h.e.i.StatefulPersistenceContext       : Initializing non-lazy collections
2020-03-07 18:33:55.686 DEBUG 1236 --- [lication Thread] org.hibernate.loader.Loader              : Done entity load
2020-03-07 18:33:55.686 TRACE 1236 --- [lication Thread] o.h.e.i.DefaultMergeEventListener        : Merging transient instance
2020-03-07 18:33:55.691 TRACE 1236 --- [lication Thread] org.hibernate.engine.internal.Cascade    : Processing cascade ACTION_MERGE for: com.bcadaval.memefinder3020.modelo.beans.Imagen
2020-03-07 18:33:55.691 TRACE 1236 --- [lication Thread] org.hibernate.engine.internal.Cascade    : Done processing cascade ACTION_MERGE for: com.bcadaval.memefinder3020.modelo.beans.Imagen
2020-03-07 18:33:55.697 TRACE 1236 --- [lication Thread] o.h.e.i.AbstractSaveEventListener        : Saving [com.bcadaval.memefinder3020.modelo.beans.Imagen#<null>]
2020-03-07 18:33:55.706 TRACE 1236 --- [lication Thread] o.hibernate.event.internal.WrapVisitor   : Wrapped collection in role: com.bcadaval.memefinder3020.modelo.beans.Imagen.etiquetas
2020-03-07 18:33:55.707 TRACE 1236 --- [lication Thread] org.hibernate.engine.spi.ActionQueue     : Adding an EntityIdentityInsertAction for [com.bcadaval.memefinder3020.modelo.beans.Imagen] object
2020-03-07 18:33:55.708 TRACE 1236 --- [lication Thread] org.hibernate.engine.spi.ActionQueue     : Adding insert with no non-nullable, transient entities: [EntityIdentityInsertAction[com.bcadaval.memefinder3020.modelo.beans.Imagen#<delayed:1>]]
2020-03-07 18:33:55.708 TRACE 1236 --- [lication Thread] org.hibernate.engine.spi.ActionQueue     : Adding resolved non-early insert action.
2020-03-07 18:33:55.711 TRACE 1236 --- [lication Thread] org.hibernate.engine.internal.Cascade    : Processing cascade ACTION_MERGE for: com.bcadaval.memefinder3020.modelo.beans.Imagen
2020-03-07 18:33:55.714 TRACE 1236 --- [lication Thread] org.hibernate.engine.internal.Cascade    : Cascade ACTION_MERGE for collection: com.bcadaval.memefinder3020.modelo.beans.Imagen.etiquetas
2020-03-07 18:33:55.714 TRACE 1236 --- [lication Thread] org.hibernate.engine.internal.Cascade    : Done cascade ACTION_MERGE for collection: com.bcadaval.memefinder3020.modelo.beans.Imagen.etiquetas
2020-03-07 18:33:55.714 TRACE 1236 --- [lication Thread] org.hibernate.engine.internal.Cascade    : Done processing cascade ACTION_MERGE for: com.bcadaval.memefinder3020.modelo.beans.Imagen
2020-03-07 18:33:55.715 TRACE 1236 --- [lication Thread] org.hibernate.internal.SessionImpl       : Closing session [ac23f2c2-d709-4a5e-a206-68fe3e65bd51]
2020-03-07 18:33:55.715 TRACE 1236 --- [lication Thread] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Closing JDBC container [org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl@53fca5fc]
2020-03-07 18:33:55.715 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Releasing JDBC resources
2020-03-07 18:33:55.715 TRACE 1236 --- [lication Thread] o.h.r.j.i.LogicalConnectionManagedImpl   : Closing logical connection
2020-03-07 18:33:55.715 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Releasing JDBC resources
2020-03-07 18:33:55.715 TRACE 1236 --- [lication Thread] o.h.r.j.i.LogicalConnectionManagedImpl   : Logical connection closed
2020-03-07 18:33:55.720 DEBUG 1236 --- [lication Thread] o.h.e.t.internal.TransactionImpl         : committing
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] cResourceLocalTransactionCoordinatorImpl : ResourceLocalTransactionCoordinatorImpl#beforeCompletionCallback
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] org.hibernate.internal.SessionImpl       : SessionImpl#beforeTransactionCompletion()
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] org.hibernate.internal.SessionImpl       : Automatically flushing session
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] .t.i.SynchronizationRegistryStandardImpl : SynchronizationRegistryStandardImpl.notifySynchronizationsBeforeTransactionCompletion
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] j.i.AbstractLogicalConnectionImplementor : Preparing to commit transaction via JDBC Connection.commit()
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] j.i.AbstractLogicalConnectionImplementor : Transaction committed via JDBC Connection.commit()
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] j.i.AbstractLogicalConnectionImplementor : LogicalConnection#afterTransaction
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Releasing JDBC resources
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] j.i.AbstractLogicalConnectionImplementor : re-enabling auto-commit on JDBC Connection after completion of JDBC-based transaction
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] cResourceLocalTransactionCoordinatorImpl : ResourceLocalTransactionCoordinatorImpl#afterCompletionCallback(true)
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] .t.i.SynchronizationRegistryStandardImpl : SynchronizationRegistryStandardImpl.notifySynchronizationsAfterTransactionCompletion(3)
2020-03-07 18:33:55.721 TRACE 1236 --- [lication Thread] org.hibernate.internal.SessionImpl       : SessionImpl#afterTransactionCompletion(successful=true, delayed=false)
2020-03-07 18:33:55.722 TRACE 1236 --- [lication Thread] org.hibernate.internal.SessionImpl       : Closing session [1956899b-7cc9-4f6a-bb51-5b45abbfed69]
2020-03-07 18:33:55.722 TRACE 1236 --- [lication Thread] o.h.e.jdbc.internal.JdbcCoordinatorImpl  : Closing JDBC container [org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl@4ec81919]
2020-03-07 18:33:55.722 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Releasing JDBC resources
2020-03-07 18:33:55.722 TRACE 1236 --- [lication Thread] o.h.r.j.i.LogicalConnectionManagedImpl   : Closing logical connection
2020-03-07 18:33:55.727 TRACE 1236 --- [lication Thread] o.h.r.j.i.ResourceRegistryStandardImpl   : Releasing JDBC resources
2020-03-07 18:33:55.727 TRACE 1236 --- [lication Thread] o.h.r.j.i.LogicalConnectionManagedImpl   : Logical connection closed

我还注意到，查询在连接关闭之后提交(Ctrl+F 的时间戳 2020-03-07 18:33:55.720)，我不知道知道这是否与坚持有关。

Answer 1

这是因为在您尝试从数据库获取数据之前事务尚未关闭。

尝试使用saveAndFlush();而不是save();