userservice.java

java中如何对Hibernate技术的使用！代码详尽！

package user;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.HibernateException;
import java.util.List;

public class UserService {	
	
	private static final Log log = LogFactory.getLog(UserService.class);
	
	public static boolean regist(User user){//注册一个用户
		
		IUserDAO dao = DAOFactory.getUserDAO();		
		try{
			dao.save(user);
			
			log.debug("注册用户成功!");		
			return true;
			
		}catch(HibernateException e){
			log.error("注册用户失败!");			
			return false;			
		}finally{
			try  { 
		        dao.getSession().close();
		      } catch  (Exception e) { 
		    	  log.error("Session对象无法关闭!");
		      }
		}
	}	
	public static boolean login(User user){//用户登录验证	
		IUserDAO dao = DAOFactory.getUserDAO();
		
		try{
			List userlist=dao.findByExample(user);
			
			if(!userlist.isEmpty()){
				log.debug("用户登录成功!");				
				return true;
			}
			else{
				log.error("用户登录失败!");				
				return false;
			}
		}catch(HibernateException e){
			log.error("无法进行登录验证!");			
			return false;			
		}finally{
			try  { 
		        dao.getSession().close();
		      } catch  (Exception e) { 
		    	  log.error("Session对象无法关闭!");
		      }	
		}
	}
}