userdaoimpl.java

网上购物车的JAVA代码实现版

package feng.shoppingcart.dao.impl;

import java.util.*;

import org.hibernate.Query;
import org.hibernate.Session;

import feng.shoppingcart.dao.UserDao;
import feng.shoppingcart.entity.*;
import feng.shoppingcart.util.*;

public class UserDaoImpl implements UserDao{


	public void deleteUser(User user) throws Exception{
		Session	session=UtilContext.getSession();
		session.delete(user);
	}


	public User insertUser(User user) throws Exception{
		Session session=UtilContext.getSession();
		session.save(user);
		return user;
	}


	public Collection<User> queryAllUser()throws Exception {
		Session session=UtilContext.getSession();
		Query query=session.createQuery("from User");
		List result=query.list();
		return result;
	}


	public User queryUserByName(String name) throws Exception{
		Session session=UtilContext.getSession();
		User user=null;
		Query query=session.createQuery("from User as u where u.name=:name");
		query.setString("name", name);
		List result=query.list();
		if(!result.isEmpty()){
			user=(User)result.get(0);
		}
		return user;
	}


	public User queryUserById(Integer id) throws Exception{
		Session session=UtilContext.getSession();
		User user=null;
		user=(User)session.get(User.class,id);
		return user;
	}



	public User updateUser(User user) throws Exception{
		Session session=UtilContext.getSession();
		session.update(user);
		return user;
	}
}