私は冬眠するのが初めてです。私は注釈付きエンティティクラスからデータベーステーブルを生成しようとしています。
Tag
クラス:これらを使用して、
package util;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import playground.data.entities.Tag;
public class HibernateUtil {
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
// Create the SessionFactory from hibernate.cfg.xml
Configuration config = new Configuration();
//config.addAnnotatedClass(Tag.class); //<-- tried this too
return config.configure().buildSessionFactory();
// Also tried the following.
// ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().configure().build();
// return new MetadataSources(serviceRegistry).buildMetadata().buildSessionFactory();
} catch (Throwable ex) {
// Make sure you log the exception, as it might be swallowed
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
public static void shutdown() {
// Close caches and connection pools
getSessionFactory().close();
}
}
最後に:ここで
<?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>
<property name="hibernate.connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
<property name="hibernate.connection.password">1234</property>
<property name="hibernate.connection.url">jdbc:sqlserver://localhost;database=HibernatePlayground;SelectMethod=cursor</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.default_schema">dbo</property>
<property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<mapping class="playground.data.entities.Tag" />
</session-factory>
</hibernate-configuration>
は私のHibernateUtil
クラス(:http://www.mkyong.com/hibernate/maven-3-hibernate-3-6-oracle-11g-example-xml-mapping/、http://www.mkyong.com/hibernate/maven-3-hibernate-3-6-oracle-11g-example-annotation/参照)である:ここでは
package playground.data.entities;
import java.time.Instant;
import javax.persistence.*;
@Entity
public class Tag extends BaseEntity {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public long Id;
@Column(unique = true, nullable = false)
public String Name;
@Column(nullable = false)
public Instant CreatedOn;
}
は私hibernate.cfg.xml
ですからメイン:
package playground;
import java.time.Instant;
import org.hibernate.Session;
import playground.data.entities.Tag;
import util.HibernateUtil;
public class Main {
public static void main(String[] args) {
Tag tag1 = new Tag() {
{
Name = "Tag1";
CreatedOn = Instant.now();
}
};
Tag tag2 = new Tag(){
{
Name = "Tag2";
CreatedOn = Instant.now();
}
};
Session ss = HibernateUtil.getSessionFactory().openSession();
ss.beginTransaction();
// saving objects to session
ss.save(tag1); //<-- getting error here.
ss.save(tag2);
ss.getTransaction().commit();
HibernateUtil.shutdown();
}
}
しかしsave
がtag1
オブジェクトをINGの一方で、私はException in thread "main" org.hibernate.MappingException: Unknown entity: playground.Main$1
を取得しています。以下は 休止状態からのログに記録された情報と一緒にフルスタックトレースです:
Nov 15, 2016 11:42:59 AM org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {5.2.4.Final}
Nov 15, 2016 11:42:59 AM org.hibernate.cfg.Environment
INFO: HHH000206: hibernate.properties not found
Nov 15, 2016 11:42:59 AM org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
Nov 15, 2016 11:43:00 AM org.hibernate.annotations.common.reflection.java.JavaReflectionManager
INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
Nov 15, 2016 11:43:00 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)
Nov 15, 2016 11:43:00 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001005: using driver [com.microsoft.sqlserver.jdbc.SQLServerDriver] at URL [jdbc:sqlserver://localhost;database=HibernatePlayground;SelectMethod=cursor]
Nov 15, 2016 11:43:00 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001001: Connection properties: {user=sa, password=****}
Nov 15, 2016 11:43:00 AM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator
INFO: HHH10001003: Autocommit mode: false
Nov 15, 2016 11:43:00 AM org.hibernate.engine.jdbc.connections.internal.PooledConnections
INFO: HHH000115: Hibernate connection pool size: 20 (min=1)
Nov 15, 2016 11:43:00 AM org.hibernate.dialect.Dialect
INFO: HHH000400: Using dialect: org.hibernate.dialect.SQLServerDialect
Nov 15, 2016 11:43:02 AM org.hibernate.resource.transaction.backend.jdbc.internal.DdlTransactionIsolatorNonJtaImpl getIsolatedConnection
INFO: HHH10001501: Connection obtained from JdbcConnectionAccess [org.hibernate.engine.jdbc.env.internal.[email protected]10c626be] for (non-JTA) DDL execution was not in auto-commit mode; the Connection 'local transaction' will be committed and the Connection will be set into auto-commit mode.
Exception in thread "main" org.hibernate.MappingException: Unknown entity: playground.Main$1
at org.hibernate.metamodel.internal.MetamodelImpl.entityPersister(MetamodelImpl.java:620)
at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1605)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:104)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:674)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:666)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:661)
at playground.Main.main(Main.java:85)
私が使用しています:
- をするJava 1.8は、休止状態:5.2
- データベースサーバー:SQL Serverの2016
- OSをWindows 10
- IDE:Eclipse IDEネオン(4.6.0)
マイプロジェクト構造は次のとおりです。
それはMain
ためMappingException
を投げている理由は、私はわかりません。提案してください。