我已经用 Hibernate 3 建立了一个 Spring 项目，并且我正在使用注释。我刚刚实现了一个导入脚本，它填充一个对象并使用我从HibernateSessionFactory.getSession()调用中获得的会话对象进行保存。
我的配置看起来像这样（更改名称和详细信息以保护无辜者等）
<?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">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="hbm2ddl.auto">update</property>
<property name="dialect">
org.hibernate.dialect.PostgreSQLDialect
</property>
<property name="connection.url">
jdbc:postgresql://localhost:5432/foobar
</property>
<property name="connection.username">myuser</property>
<property name="connection.password">mypass</property>
<property name="connection.driver_class">
org.postgresql.Driver
</property>
<property name="myeclipse.connection.profile">
org.postgres.Driver
</property>
<mapping class="com.mycompany.Foo" />
<mapping class="com.mycompany.Bar" />
</session-factory>
</hibernate-configuration>
据我了解， hbm2ddl.auto=update 配置应该意味着我的表将自动创建。
我的 HibernateSessionFactory 看起来像这样：
package com.mycompany;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.AnnotationConfiguration;
/**
* Configures and provides access to Hibernate sessions, tied to the
* current thread of execution. Follows the Thread Local Session
* pattern, see {@link http://hibernate.org/42.html }.
*/
public class HibernateSessionFactory {
/**
* Location of hibernate.cfg.xml file.
* Location should be on the classpath as Hibernate uses
* #resourceAsStream style lookup for its configuration file.
* The default classpath location of the hibernate config file is
* in the default package. Use #setConfigFile() to update
* the location of the configuration file for the current session.
*/
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
private static Configuration configuration = new AnnotationConfiguration();
private static org.hibernate.SessionFactory sessionFactory;
private static String configFile = CONFIG_FILE_LOCATION;
static {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
private HibernateSessionFactory() {
}
/**
* Returns the ThreadLocal Session instance. Lazy initialize
* the <code>SessionFactory</code> if needed.
*
* @return Session
* @throws HibernateException
*/
public static Session getSession() throws HibernateException {
Session session = (Session) threadLocal.get();
if (session == null || !session.isOpen()) {
if (sessionFactory == null) {
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession() : null;
threadLocal.set(session);
}
return session;
}
/**
* Rebuild hibernate session factory
*
*/
public static void rebuildSessionFactory() {
try {
configuration.configure(configFile);
sessionFactory = configuration.buildSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
/**
* Close the single hibernate session instance.
*
* @throws HibernateException
*/
public static void closeSession() throws HibernateException {
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null) {
session.close();
}
}
/**
* return session factory
*
*/
public static org.hibernate.SessionFactory getSessionFactory() {
return sessionFactory;
}
/**
* return session factory
*
* session factory will be rebuilded in the next call
*/
public static void setConfigFile(String configFile) {
HibernateSessionFactory.configFile = configFile;
sessionFactory = null;
}
/**
* return hibernate configuration
*
*/
public static Configuration getConfiguration() {
return configuration;
}
}
我很确定我正确使用了这段代码，基本上我的代码逻辑如下：
Session session = HibernateSessionFactory.getSession();
Foo foo = new Foo();
...
session.save(foo);
所以这应该要么保存我的对象，要么开始对我做错的愚蠢的事情大喊大叫。没发生什么事。
日志中没有输出，表仍然不存在，我已经手动测试了连接，并通过直接使用配置的 Eclipse 插件进行了测试。即使是save()调用也没有效果或错误。
这是配置错误还是逻辑错误？干杯。