还是spring+hibernate的问题

[code:1]import org.hibernate.SessionFactory;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.hibernate.cfg.Configuration;
import cn.boyoi.domain.User;
public class UserDaoImpl extends HibernateDaoSupport implements UserDao{
public UserDaoImpl()
{
super();
}
public User getUserById(long id)
{
        User user = (User)getHibernateTemplate().find("from user_detial u where u.user_id=?",new Long(id));
//User user = (User)getHibernateTemplate().load(User.class,new Long(id));
return user;
}
public void addUser(User user)
{
getHibernateTemplate().save(user);
}
}[/code:1]
在spring环境下调用addUser()方法，能够正常存入对象，但紧接着用getUserById()时，提示错误 user_detial is not mapped
如果把getUserById()改为User user = (User)getHibernateTemplate().load(User.class,new Long(id)); 则提示错误 org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed
有人知道为什么吗，User的代码在http://www.javaeye.com/viewtopic.php?t=15297里

Hibernate3.0 采用新的基于ANTLR的HQL/SQL查询翻译器。

你应该是缺少antlr-2.7.5H3.jar文件。

在我的类路径里面有这个antlr-2.7.5H3.jar类的....还是不行

哈哈，终于解决了，在from user_detial u where u.user_id=?里，ｕｓｅｒ＿ｄｅｔｉａｌ是一个映射后的表名，实际应该是用持久化类名Ｕｓｅｒ．．．．．．
顺便提出各新问题，getHibernateTemplate().load(User.class,new Long(id))出现LazyInitializationException: could not initialize proxy - the owning Session was closed 的错误，请问有人知道ＨｉｂｅｒｎａｔｅＴｅｍｐｌａｔｅ是怎么管理ｓｅｓｓｉｏｎ的吗？