org.hibernate.SessionException: Session is closed!第一次可以运行，第二次就报错

[sw19810913]

第一次运行，可以显示数据列表，然后再刷新就报错：org.hibernate.SessionException: Session is closed!
点删除、修改还是报这个错
用的open session inview模式

web.xml配置如下：
<!-- 过滤器，使session在页面加载完后关闭 -->
	<filter>
		<filter-name>HibernateSessionFilter</filter-name>
		<filter-class>com.util.HibernateSessionFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>HibernateSessionFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

HibernateSessionFilter类配置如下：
public class HibernateSessionFilter implements Filter {	
	private Transaction tx ;
	private SessionFactory sessionFactory;
	public void destroy() {
		sessionFactory.close();
	}
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		//在用户发出请求的时候获得session对象
		try {
			Session session = sessionFactory.getCurrentSession();
			tx = session.beginTransaction();
			chain.doFilter(request, response);
			tx.commit();
		} catch (HibernateException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
			if (tx.isActive()) { //如果事务存活,发生违例
				tx.rollback();
			}
		}
	}
	public void init(FilterConfig arg0) throws ServletException {
		//初始化
		sessionFactory = HibernateSessionFactoryUtil.getSessionFactory();
	}
}
servlet中调用：
	public void list(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException {
		List<GuestBook> list = dao.findAllOrderById();
		request.setAttribute("admin.list", list);
		request.getRequestDispatcher("/admin/secure/list.jsp").forward(request, response);
	}
GuestBookDaoHibernate 类：
public class GuestBookDaoHibernate extends GenericDaoHibernate<GuestBook, Integer> implements GuestBookDao {

	private Session session = HibernateSessionFactoryUtil.getSessionFactory().getCurrentSession();
	public List<GuestBook> findAllOrderById() {
		Query query = session.createQuery("from GuestBook order by id desc");
		return query.list();
	}
}
通用的类：
public class GenericDaoHibernate<T,PK extends Serializable> implements GenericDao<T,PK> {
	private Session session = HibernateSessionFactoryUtil.getSessionFactory().getCurrentSession();
	private Class<T> clazz;
	public GenericDaoHibernate(){
		//获取持久化对象clazz的真正类型
		//通过反射 获取反射当中擦拭法获取泛型的真正类型
		clazz = (Class<T>)((ParameterizedType)getClass().getGenericSuperclass())
				.getActualTypeArguments()[0];
	}
	public void delete(T entity) {
		session.delete(entity);
	}
	public List findAll() {
		Query query = session.createQuery("from " + clazz.getName());
		return query.list();
	}
	public T findById(PK id) {
		return (T)session.get(clazz, id);
	}
	public T save(T entity) {
		session.save(entity);
		return entity;
	}
	public void update(T entity) {
		session.update(entity);
	}
}
接口：
public interface GuestBookDao extends GenericDao<GuestBook, Integer>{	
	public List<GuestBook> findAllOrderById();	
}

[sw19810913]

我是跟着 v512 北京新科海学校
刘伟出的 《Hibernate实战与开发》 这本书练的，现在到第五章就出现这个问题没法解决了

有现在在练这个Hibernate的同学吗？

网上找了很久找不到结果！第一次可以运行，可以显示信息，但再点刷新或者点删除更新就报错

我跟着刘伟老师的视频练的，但他的可以运行，我的就不可以，郁闷~！
错误：

org.hibernate.SessionException: Session is closed!
	at org.hibernate.impl.AbstractSessionImpl.errorIfClosed(AbstractSessionImpl.java:72)
	at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:901)
	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:842)
	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:835)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:342)
	at $Proxy0.get(Unknown Source)
	at com.dao.hibernate.GenericDaoHibernate.findById(GenericDaoHibernate.java:36)
	at com.servlet.ManageServlet.delete(ManageServlet.java:72)
	at com.servlet.ManageServlet.doPost(ManageServlet.java:35)
	at com.servlet.ManageServlet.doGet(ManageServlet.java:23)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.filter.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:18)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at com.util.HibernateSessionFilter.doFilter(HibernateSessionFilter.java:34)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:619)

[SustPhenex]

你解决了没有？我现在也是这个问题

[pengchengwanlirwx]

把getCurrentSession(),改为openSession()就行了，不过这样好像很占用资源

[pengchengwanlirwx]

看下这篇文章吧http://www.17od.com/2006/11/06/using-managed-sessions-in-hibernate-to-ease-unit-testing/