HibernateDaoSupport 内存泄漏的问题！

为什么在控制台会提示这样的信息： WARN [ConnectionManager] unclosed connection, forgot to call close() on your session? ---------------------------------------------------------------- 我是用spring+hibernate架构的，在数据库访问类DAO中extends HibernateDaoSupport。我是用myeclipse做的，它帮我自动生成了SessionFactory类：

import org.hibernate.ConnectionReleaseMode; import org.hibernate.HibernateException; import org.hibernate.Session; import org.hibernate.cfg.Configuration;

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.
NOTICE: Location should be on the classpath as Hibernate uses
#resourceAsStream style lookup for its configuration file. That
is place the config file in a Java package - the default location
is the default Java package.

Examples:

CONFIG_FILE_LOCATION = "/hibernate.conf.xml".

CONFIG_FILE_LOCATION = "/com/foo/bar/myhiberstuff.conf.xml".

*/ private static String CONFIG_FILE_LOCATION = "/xxx/WebRoot/WEB-INF/applicationContext.xml";

/ Holds a single instance of Session */ private static final ThreadLocal threadLocal = new ThreadLocal();

/ The single instance of hibernate configuration */ private static final Configuration cfg = new Configuration();

/ The single instance of hibernate SessionFactory */ private static org.hibernate.SessionFactory sessionFactory;

Returns the ThreadLocal Session instance. Lazy initialize
the SessionFactory if needed.

@return Session
@throws HibernateException

*/ public static Session currentSession() throws HibernateException { Session session = (Session) threadLocal.get();

if (session == null || !session.isOpen()) { if (sessionFactory == null) { try { cfg.configure(CONFIG_FILE_LOCATION); sessionFactory = cfg.buildSessionFactory(); } catch (Exception e) { System.err .println("%%%% Error Creating SessionFactory %%%%"); e.printStackTrace(); } } session = (sessionFactory != null) ? sessionFactory.openSession() : null; threadLocal.set(session); }

return session; }

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(); } }

Default constructor.

*/ private HibernateSessionFactory() { }

} -------------------------------------------------------- DAO基本都是这样的： public class TAreaDAO extends HibernateDaoSupport {

public TAreaDAO(){ super(); } ..... .....

public static TAreaDAO getFromApplicationContext (ApplicationContext ctx) { return (TAreaDAO) ctx.getBean("TAreaDAO"); } }