我的代码如下。可能我以类似的方式多次使用它,即简单地说,我以这种方式管理会话和事务:
List<Login> users= null;
try{
session=HibernateUtil.getSessionFactory().getCurrentSession();
tx=session.beginTransaction();
users=session.createQuery("from Login").list();
tx.commit();
}catch(Exception e){System.out.println("commit exception:"+e);
try {tx.rollback();} catch (Exception ex) {System.out.println("rollback exception:"+ex);}
}finally{if(session!=null && session.isOpen()){session.close();}}
return users;
现在,当我第一次运行数据库服务(使用 MySQL)并使用此查询从命令提示符检查时...
show status like 'Conn%';
...结果是:
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Connections | 2 |
+---------------+-------+
当我启动我的应用程序并使用它时。打开几页并查询相同的内容后。我得到的连接数为 6,我什至看到了 20 以上。
现在我想知道休眠是否正在关闭连接?
我正在以这种方式处理所有事务,我交叉检查并在不关闭会话的情况下看到任何代码块。
休眠.cfg.xml
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="connection.url">
jdbc:mysql://localhost:3306/shareapp
</property>
<property name="connection.username">pluto</property>
<property name="connection.password">admin</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">
org.hibernate.dialect.MySQLDialect
</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">
org.hibernate.cache.NoCacheProvider
</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">update</property>
</session-factory>
hibernateutil 类
public class HibernateUtil {
private static final SessionFactory sessionFactory;
static {
try {
AnnotationConfiguration config = new AnnotationConfiguration();
config.addAnnotatedClass(Login.class);
config.addAnnotatedClass(FilesInfo.class);
config.addAnnotatedClass(FilesShare.class);
config.configure("hibernate.cfg.xml");
// new SchemaExport(config).create(true,true);
sessionFactory = config.buildSessionFactory();
} catch (Throwable ex) {
// Log the exception.
System.err.println("Initial SessionFactory creation failed." + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
}
谢谢!