1. public class Test  extends HibernateDaoSupport{   
2.      public void save(User user){   
3.         this.getSession().save(user);   
4.      }   
5. }    

public class Test  extends HibernateDaoSupport{
     public void save(User user){
        this.getSession().save(user);
     }
}  
 

1. public class Test  extends HibernateDaoSupport{   
2.      public void save(User user){   
3.         Session session = this.getSession();   
4.         session.save(user);   
5.         session.close();   
6.        // releaseSession(session); //這種方法，我用過的，絕對能解決session.close()的錯誤。
7.      }   
8. }   

public class Test  extends HibernateDaoSupport{
     public void save(User user){
        Session session = this.getSession();
        session.save(user);
        session.close();
        // releaseSession(session); 
     }
} 
 

1.  org.springframework.orm.hibernate3.HibernateSystemException: Session is closed; nested exception is org.hibernate.SessionException: Session is closed   
2. …   
3. org.hibernate.SessionException: Session is closed  

 org.springframework.orm.hibernate3.HibernateSystemException: Session is closed; nested exception is org.hibernate.SessionException: Session is closed
…
org.hibernate.SessionException: Session is closed

1. protected final void releaseSession(Session session) {   
2.     SessionFactoryUtils.releaseSession(session, getSessionFactory());   
3. }  

	protected final void releaseSession(Session session) {
		SessionFactoryUtils.releaseSession(session, getSessionFactory());
	}

1. public static void releaseSession(    
2.      Session session,SessionFactory sessionFactory) {   
3.           if (session == null) {   
4.               return;   
5.           }   
6.           // Only close non-transactional Sessions.   
7.           if (!isSessionTransactional(session,sessionFactory))   {   
8.              closeSessionOrRegisterDeferredClose  (session, sessionFactory);   
9.           }   
10.     }  

public static void releaseSession( 
     Session session,SessionFactory sessionFactory) {
		  if (session == null) {
			  return;
		  }
		  // Only close non-transactional Sessions.
		  if (!isSessionTransactional(session,sessionFactory))   {
			 closeSessionOrRegisterDeferredClose  (session, sessionFactory);
		  }
	}

1. protected final Session getSession()   
2.         throws DataAccessResourceFailureException, IllegalStateException {   
3.         return getSession(this.hibernateTemplate.isAllowCreate());   
4. }  

protected final Session getSession()
	    throws DataAccessResourceFailureException, IllegalStateException {

		return getSession(this.hibernateTemplate.isAllowCreate());
}

1. protected  final  org.hibernate.Session  getSession()    
2. throws DataAccessResourceFailureException,   IllegalStateException     
3. Get a Hibernate Session, either from the current transaction or a new one. The latter is only allowed if the "allowCreate" setting of this bean's HibernateTemplate is true.   

protected  final  org.hibernate.Session  getSession() 
throws DataAccessResourceFailureException,   IllegalStateException  

Get a Hibernate Session, either from the current transaction or a new one. The latter is only allowed if the "allowCreate" setting of this bean's HibernateTemplate is true. 

1. java.lang.IllegalStateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here ...  

java.lang.IllegalStateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here ...

1. Session session = null;   
2. for(int m =0;m<5;m++){   
3.     Admin admin = new Admin();   
4.     admin.setName("test");   
5.     admin.setPassword("098");      
6.     session = this.getSession();   
7.     session.save(admin);   
8. }  

		Session session = null;
		for(int m =0;m<5;m++){
			Admin admin = new Admin();
			admin.setName("test");
			admin.setPassword("098");	
			session = this.getSession();
			session.save(admin);
		}

1. ①getCurrentSession建立的session會和繫結到當前執行緒,而openSession不會。    
2. ②getCurrentSession建立的執行緒會在事務回滾或事物提交後自動關閉,而openSession必須手動關閉  

①getCurrentSession建立的session會和繫結到當前執行緒,而openSession不會。 
②getCurrentSession建立的執行緒會在事務回滾或事物提交後自動關閉,而openSession必須手動關閉

1. public class Group implements Serializable{    
2.     private int id;    
3.     private String name;    
4.     private Set users;   
5.          ...   
6. }  

public class Group implements Serializable{ 
	private int id; 
	private String name; 
	private Set users;
         ...
}

1. List groups = ht.find("from Group");   
2. Group group = (Group)groups.get(0);   
3. HttpSession session = ServletActionContext.getRequest().getSession();   
4. session.setAttribute("group", group);  

List groups = ht.find("from Group");
Group group = (Group)groups.get(0);
HttpSession session = ServletActionContext.getRequest().getSession();
session.setAttribute("group", group);

1. <%     
2.      Group group = (Group)session.getAttribute("group");   
3.      out.println(group.getUsers());   
4. %>   

<%  
     Group group = (Group)session.getAttribute("group");
     out.println(group.getUsers());
%> 

1. org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: entity.Group.users, no session or session was closed  

org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: entity.Group.users, no session or session was closed

1. <filter>     
2.    <filter-name>hibernateFilter</filter-name>    
3.    <filter-class>    
4. org.springframework.orm.hibernate3.support.OpenSessionInViewFilter   
5.    </filter-class>     
6. </filter>  

<filter>  
   <filter-name>hibernateFilter</filter-name> 
   <filter-class> 
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
   </filter-class>  
</filter>