package com.bjpowernode.usermgr.util;
import org.hibernate.Session;
//hibernate3的 
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
public class HibernateUtils {
 private static SessionFactory factory;
 static{
  try{
   //读取hibernate.cfg.xml文件 
   Configuration cfg=new Configuration().configure();
   //建立SessionFactory 
   factory=cfg.buildSessionFactory();
  }
  catch(Exception e){
   e.printStackTrace();
  }
 }
 //获得开启着的Session 
 public static Session getSession(){
  return factory.openSession();
 }
 //关闭Session 
 public static void closeSession(Session session){
  if(session!=null){
   if(session.isOpen()){
    session.close();
   }
  }
 }
 public static SessionFactory getSessionFactory(){
  return factory;
 }
}

package com.bjpowernode.usermgr.manager;
import java.util.Date;
import org.hibernate.Session;
import com.bjpowernode.usermgr.domain.Log;
import com.bjpowernode.usermgr.domain.User;
import com.bjpowernode.usermgr.util.HibernateUtils;
public class UserManagerImpl implements UserManager {
 /** 
  * 添加用户和添加日志都使用了同一个Session，所以 
  * 当用户添加失败的时候，日志也会添加失败。事务回滚 
  * 用户添加成功日志也会添加成功 
  */
 public void addUser(User user) {
  Session session=null;
  try{
   //取得当前线程Session 
   session=HibernateUtils.getSessionFactory().getCurrentSession();
   session.beginTransaction();
   //保存用户 
   session.save(user);
   Log log=new Log();
   log.setType("操作日志");
   log.setTime(new Date());
   log.setDetail("XXX");
   LogManager logManager=new LogManagerImpl();
   //保存日志 
   logManager.addLog(log);
   session.getTransaction().commit();
  }
  catch(Exception e){
   e.printStackTrace();
   session.getTransaction().rollback();
  }
 }
}

package com.bjpowernode.usermgr.manager;
import org.hibernate.Session;
import com.bjpowernode.usermgr.domain.Log;
import com.bjpowernode.usermgr.util.HibernateUtils;
public class LogManagerImpl implements LogManager {
 public void addLog(Log log) {
  //获取当前线程的Session 
  HibernateUtils.getSessionFactory().getCurrentSession().save(log);
 }
}

package com.bjpowernode.usermgr.manager;
import junit.framework.TestCase;
import com.bjpowernode.usermgr.domain.User;
public class UserManagerImplTest extends TestCase {
 public void testAddUser() {
  UserManager userManager=new UserManagerImpl();
  User user=new User();

  user.setName("张三"); 
  userManager.addUser(user); 
}