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liuyang

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注册时间: 2006年11月30日 15:07

hibernate问题求助	2006年11月30日 15:10
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我近日阅读《Hibernate开发及整合应用大全》一书，用jbuilder 2006作第二章练习时，开始提示log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
但能执行成功，后来我Rebuild一下工程，再执行就报错
log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" java.lang.NoClassDefFoundError
at persistence.DAOImp.getAllStu(DAOImp.java:71)
at BusinessManager.BM.main(BM.java:19)
请给出详细解决办法，不胜感激！附件是源代码

package persistence;
DAOImp类代码

import java.util.List;
import model.Student;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import BusinessManager.BM;

public class DAOImp {
static Session session=null;

/*------------取得所有的学生列表-----------------*/
public static List getAllStu() {
List list=null;
try {
session = HibernateUtil.currentSession(); //开启连接
Transaction tx = session.beginTransaction(); //开启事务
Query q=session.createQuery("from Student");
list=q.list();
tx.commit();

} catch (HibernateException e) { //捕捉例外
e.printStackTrace();
}finally
{
HibernateUtil.closeSession(session);//!!!!!!!!第71行
}
return list;

}

}

HibernateUtil类代码
public class HibernateUtil {
private static final SessionFactory sessionFactory;

static {
try {
sessionFactory = new Configuration().configure()
.buildSessionFactory();
} catch (HibernateException ex) {
throw new RuntimeException("Exception building SessionFactory: "
+ ex.getMessage(), ex);
}
}

public static Session currentSession() throws HibernateException {
Session s = sessionFactory.openSession();
return s;
}

public static void closeSession(Session s) {
s.close();
}

}liuyangbqb582h07P.rar

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