userbizimpl.java

网上购物车的JAVA代码实现版

package feng.shoppingcart.biz.impl;
import java.util.*;
import org.hibernate.*;

import feng.shoppingcart.biz.*;
import feng.shoppingcart.entity.*;
import feng.shoppingcart.util.*;
import feng.shoppingcart.dao.*;
public class UserBizImpl implements UserBiz{


	public User login(String name, String password) throws Exception {
		Session session=null;
		try{
			session=UtilContext.getSession();
			UserDao dao=UtilContext.getUserDao();
			User user=dao.queryUserByName(name);
			if(user!=null && user.getPassword().equals(password)){
				return user;
			}
			return null;
		}finally{
			UtilContext.release(session);
		}

	}


	public void insertOrder(Order order) throws Exception {
		Session session=null;
		Transaction trans=null;
		try{
			session=UtilContext.getSession();
			OrderDao dao=UtilContext.getOrderDao();
			trans=session.beginTransaction();
			dao.insertOrder(order);
			trans.commit();
			
		}catch(Exception e){
			if(trans!=null)	trans.rollback();
			e.printStackTrace();
			throw new Exception(e);
		}finally{
			UtilContext.release(session);
		}
		
		
	}


	public User insertUser(User user) throws Exception {
		Session session=null;
		Transaction trans=null;
		try{
			UserDao dao=UtilContext.getUserDao();
			session=UtilContext.getSession();
			trans=session.beginTransaction();
			User u=dao.insertUser(user);
			trans.commit();
			return u;
		}catch(Exception e){
			if(trans!=null)	trans.rollback();
			throw new Exception(e);
		}finally{
			UtilContext.release(session);
		}
	}


	public Collection<Product> queryAllProduct() throws Exception {
		Session session=null;
		try{
			ProductDao dao=UtilContext.getProductDao();
			session=UtilContext.getSession();
			Collection<Product> col=dao.queryAllProduct();
			return col;
		}catch(Exception e){
			throw new Exception(e);
		}finally{
			UtilContext.release(session);
		}
	}


	public User updateUser(User user) throws Exception {
		Session session=null;
		Transaction trans=null;
		try{
			session=UtilContext.getSession();
			UserDao dao=UtilContext.getUserDao();
			trans=session.beginTransaction();
			User u=dao.updateUser(user);
			trans.commit();
			return u;
		}catch(Exception e){
			if(trans!=null)	trans.rollback();
			throw new Exception(e);
		}finally{
			UtilContext.release(session);
		}
	}


	public Product queryProductById(Integer id) throws Exception {
		Session session=null;
		try{
			ProductDao dao=UtilContext.getProductDao();
			session=UtilContext.getSession();
			Product product=dao.queryProductById(id);
			return product;
		}catch(Exception e){
			throw new Exception(e);
		}finally{
			UtilContext.release(session);
		}
	}


	public Product queryProductByName(String name) throws Exception {
		Session session=null;
		try{
			ProductDao dao=UtilContext.getProductDao();
			session=UtilContext.getSession();
			Product product=dao.queryProductByName(name);
			return product;
		}catch(Exception e){
			throw new Exception(e);
		}finally{
			UtilContext.release(session);
		}
	}
	
}