休止状態で新しく、DBにデータを書き込もうとしています。私のコード
hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory name="postsess">
<property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
<property name="hibernate.connection.password">123456</property>
<property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/postgis</property>
<property name="hibernate.connection.username">postgres</property>
<property name="hibernate.default_schema">public</property>
<property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<!-- Mapping files -->
<mapping resource="net.sf.hibernate.examples.quickstart.Cat.hbm.xml"/>
</session-factory>
</hibernate-configuration>
HibernateUtin
package net.sf.hibernate.examples.quickstart;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import net.sf.hibernate.*;
//import net.sf.hibernate.examples.quickstart.hibernate.cfg.xml;
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
// Create the SessionFactory
sessionFactory = new Configuration().configure().buildSessionFactory();
} catch (HibernateException ex) {
throw new RuntimeException("Configuration problem: " + ex.getMessage(), ex);
}
}
public static final ThreadLocal session = new ThreadLocal();
public static Session currentSession() throws HibernateException {
Session s = (Session) session.get();
// Open a new Session, if this Thread has none yet
if (s == null) {
s = sessionFactory.openSession();
session.set(s);
}
return s;
}
public static void closeSession() throws HibernateException {
Session s = (Session) session.get();
session.set(null);
if (s != null)
s.close();
}
}
そして例外を取得します
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" java.lang.ExceptionInInitializerError
at net.sf.hibernate.examples.quickstart.hib_main.main(hib_main.java:14)
Caused by: java.lang.RuntimeException: Configuration problem: Resource: net.sf.hibernate.examples.quickstart.Cat.hbm.xml not found
at net.sf.hibernate.examples.quickstart.HibernateUtil.<clinit> (HibernateUtil.java:20)
... 1 more
Caused by: org.hibernate.MappingException: Resource: net.sf.hibernate.examples.quickstart.Cat.hbm.xml not found
at org.hibernate.cfg.Configuration.addResource(Configuration.java:444)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1313)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1285)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1267)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1234)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1162)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1148)
at net.sf.hibernate.examples.quickstart.HibernateUtil.<clinit>(HibernateUtil.java:18)
... 1 more
私は何を間違っていますか。簡単な例をもう一度実行して、もう一度同じ例外を実行してみます。
アップデート
でマッピングファイルへのパスを変更した後、hibernate.cfg.xml別の例外が行に表示されますsession.save(princess);
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save(): net.sf.hibernate.examples.quickstart.Cat
at org.hibernate.id.Assigned.generate(Assigned.java:32)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:85)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:184)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:173)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:69)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:477)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:472)
at net.sf.hibernate.examples.quickstart.hib_main.main(hib_main.java:23)
Cat.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 15.08.2012 12:46:22 by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="net.sf.hibernate.examples.quickstart.Cat" table="CAT">
<id name="id" type="java.lang.String">
<column name="cat_id" />
<generator class="assigned" />
</id>
<property name="name" type="java.lang.String">
<column name="name" />
</property>
<property name="sex" type="char">
<column name="sex" />
</property>
<property name="weight" type="float">
<column name="weight" />
</property>
</class>
</hibernate-mapping>
そしてメインクラス。
package net.sf.hibernate.examples.quickstart;
import org.hibernate.Session;
import org.hibernate.Transaction;
public class hib_main
{
/**
* @param args
*/
public static void main(String[] args)
{
Session session = HibernateUtil.currentSession();
Transaction tx= session.beginTransaction();
Cat princess = new Cat();
princess.setName("Princess");
princess.setSex('F');
princess.setWeight(7.4f);
session.save(princess);
tx.commit();
HibernateUtil.closeSession();
}
}
