当使用 saveOrUpdate 创建新对象时,休眠将对象存储在数据库中并正确返回。但是在该方法的同一调用中创建了一个带有一些空列的附加对象。
数据库中的对象如下所示:
id 因果 isInTopTen propability 责任范围 title 312 测试测试 0 0 NULL 0 NULL 313 测试 测试 0 2 客户 3 测试
这是数据类:
@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Table(name=HibernateConstants.RISK_TABLE)
public class Risk implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private int id;
private boolean isInTopTen;
private String title;
private String cause;
private String effect;
@Enumerated(EnumType.STRING)
private Responsibility responsibility;
private int propability;
private int scope;
@OneToMany
@LazyCollection(LazyCollectionOption.FALSE)
@Cascade({CascadeType.SAVE_UPDATE, CascadeType.MERGE})
private List<Keyword> keywords;
@OneToMany
@LazyCollection(LazyCollectionOption.FALSE)
@Cascade({CascadeType.SAVE_UPDATE, CascadeType.MERGE})
private List<Action> actions;
@OneToMany
@LazyCollection(LazyCollectionOption.FALSE)
@Cascade({CascadeType.SAVE_UPDATE, CascadeType.MERGE})
private List<ProjectRisk> derivedProjectsRisks;
}
这是我将对象存储到数据库的方式: public class DataUtils { private Session session; 私有静态 DataUtils dataUtils;
private DataUtils() {}
private void setSession() {
session = HibernateSessionFactory.getInstance().getCurrentSession();
}
public static DataUtils getInstance() {
if (dataUtils == null) {
dataUtils = new DataUtils();
}
return dataUtils;
}
public void storeOne(Object o) {
setSession();
Transaction transaction = session.beginTransaction();
session.saveOrUpdate(o);
transaction.commit();
}
}
还有我的休眠配置:
public class HibernateSessionFactory {
// Singleton
private HibernateSessionFactory() {}
private static SessionFactory sessionFactory;
public static SessionFactory getInstance() {
if (sessionFactory==null) {
final Configuration configuration = new Configuration();
configuration.configure("hibernate.cfg.xml");
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
}
return sessionFactory;
}
}
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- DB-Connection -->
<property name="connection.url">jdbc:jtds:sqlserver://localhost:1433/riskManagement</property>
<property name="connection.username">riskManagement</property>
<property name="connection.password">riskManagement</property>
<property name="connection.driver_class">net.sourceforge.jtds.jdbc.Driver</property>
<property name="dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
<property name="current_session_context_class">thread</property>
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- Classes added to persistence -->
<mapping class="com.encoway.riskManagement.data.Customer" />
<mapping class="com.encoway.riskManagement.data.Keyword" />
<mapping class="com.encoway.riskManagement.data.Project" />
<mapping class="com.encoway.riskManagement.data.ProjectRisk" />
<mapping class="com.encoway.riskManagement.data.Risk" />
<mapping class="com.encoway.riskManagement.data.Action" />
</session-factory>
</hibernate-configuration>
有关此事务的日志信息:
Opening new JDBC connection
Created connection to: jdbc:jtds:sqlserver://localhost:1433/riskManagement, Isolation Level: 2
select sequence_next_hi_value from hibernate_sequences with (updlock, rowlock) where sequence_name = 'KEYWORD'
update hibernate_sequences set sequence_next_hi_value = ? where sequence_next_hi_value = ? and sequence_name = 'KEYWORD'
Generated identifier: 4882432, using strategy: org.hibernate.id.MultipleHiLoPerTableGenerator
committing
Processing flush-time cascades
Dirty checking collections
Flushed: 1 insertions, 0 updates, 0 deletions to 1 objects
Flushed: 0 (re)creations, 0 updates, 0 removals to 0 collections
Listing entities:
com.encoway.riskManagement.data.Keyword{id=4882432, name=abc}
insert into KEYWORD (name, id) values (?, ?)
committed JDBC Connection
HHH000420: Closing un-released batch
Releasing JDBC connection
Released JDBC connection
begin
Obtaining JDBC connection
Obtained JDBC connection
initial autocommit status: false
select sequence_next_hi_value from hibernate_sequences with (updlock, rowlock) where sequence_name = 'RISK'
update hibernate_sequences set sequence_next_hi_value = ? where sequence_next_hi_value = ? and sequence_name = 'RISK'
Generated identifier: 4718592, using strategy: org.hibernate.id.MultipleHiLoPerTableGenerator
Loading entity: [com.encoway.riskManagement.data.Keyword#4882432]
select keyword0_.id as id3_0_, keyword0_.name as name3_0_ from KEYWORD keyword0_ where keyword0_.id=?
Result set row: 0
Result row: EntityKey[com.encoway.riskManagement.data.Keyword#4882432]
Resolving associations for [com.encoway.riskManagement.data.Keyword#4882432]
Done materializing entity [com.encoway.riskManagement.data.Keyword#4882432]
Done entity load
committing
Processing flush-time cascades
Dirty checking collections
Collection found: [com.encoway.riskManagement.data.Risk.actions#4718592], was: [<unreferenced>] (initialized)
Collection found: [com.encoway.riskManagement.data.Risk.derivedProjectsRisks#4718592], was: [<unreferenced>] (initialized)
Collection found: [com.encoway.riskManagement.data.Risk.keywords#4718592], was: [<unreferenced>] (initialized)
Flushed: 1 insertions, 0 updates, 0 deletions to 2 objects
Flushed: 3 (re)creations, 0 updates, 0 removals to 3 collections
Listing entities:
com.encoway.riskManagement.data.Risk{id=4718592, title=null, scope=0, keywords=[com.encoway.riskManagement.data.Keyword#4882432], cause=abc, effect=abc, derivedProjectsRisks=[], isInTopTen=false, propability=0, actions=[], responsibility=null}
com.encoway.riskManagement.data.Keyword{id=4882432, name=abc}
insert into RISK (cause, effect, isInTopTen, propability, responsibility, scope, title, id) values (?, ?, ?, ?, ?, ?, ?, ?)
Inserting collection: [com.encoway.riskManagement.data.Risk.actions#4718592]
Collection was empty
Inserting collection: [com.encoway.riskManagement.data.Risk.derivedProjectsRisks#4718592]
Collection was empty
Inserting collection: [com.encoway.riskManagement.data.Risk.keywords#4718592]
insert into RISK_KEYWORD (RISK_id, keywords_id) values (?, ?)
Done inserting collection: 1 rows inserted
committed JDBC Connection
HHH000420: Closing un-released batch
Releasing JDBC connection
Released JDBC connection
begin
Obtaining JDBC connection
Obtained JDBC connection
initial autocommit status: false
Generated identifier: 4718593, using strategy: org.hibernate.id.MultipleHiLoPerTableGenerator
committing
Processing flush-time cascades
Dirty checking collections
Collection found: [com.encoway.riskManagement.data.Risk.actions#4718593], was: [<unreferenced>] (initialized)
Collection found: [com.encoway.riskManagement.data.Risk.derivedProjectsRisks#4718593], was: [<unreferenced>] (initialized)
Collection found: [com.encoway.riskManagement.data.Risk.keywords#4718593], was: [<unreferenced>] (initialized)
Flushed: 1 insertions, 1 updates, 0 deletions to 2 objects
Flushed: 3 (re)creations, 0 updates, 0 removals to 3 collections
Listing entities:
com.encoway.riskManagement.data.Risk{id=4718593, title=abc, scope=3, keywords=[com.encoway.riskManagement.data.Keyword#4882432], cause=abc, effect=abc, derivedProjectsRisks=[], isInTopTen=false, propability=2, actions=[], responsibility=CUSTOMER}
com.encoway.riskManagement.data.Keyword{id=4882432, name=abc}
insert into RISK (cause, effect, isInTopTen, propability, responsibility, scope, title, id) values (?, ?, ?, ?, ?, ?, ?, ?)
update KEYWORD set name=? where id=?
Inserting collection: [com.encoway.riskManagement.data.Risk.actions#4718593]
Collection was empty
Inserting collection: [com.encoway.riskManagement.data.Risk.derivedProjectsRisks#4718593]
Collection was empty
Inserting collection: [com.encoway.riskManagement.data.Risk.keywords#4718593]
insert into RISK_KEYWORD (RISK_id, keywords_id) values (?, ?)
Done inserting collection: 1 rows inserted
committed JDBC Connection
HHH000420: Closing un-released batch
Releasing JDBC connection
Released JDBC connection