productdaoimpl.java

网上购物系统用SSH实现的

package cn.com.tarena.ecport.dao.impl;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;
import org.springframework.orm.hibernate3.HibernateTemplate;

import cn.com.tarena.ecport.common.util.HibernateUtil;
import cn.com.tarena.ecport.dao.IProductDAO;
import cn.com.tarena.ecport.exception.ECPortException;
import cn.com.tarena.ecport.pojo.Product;

public class ProductDAOImpl implements IProductDAO {
	private HibernateTemplate template;
	public void setTemplate(HibernateTemplate template){
		this.template = template;
	}
    public void save(Product transientInstance) {
        try {
            template.save(transientInstance);
        } catch (RuntimeException re) {
            throw re;
        }
    }
    
	public void delete(Product persistentInstance) {
        try {
            template.delete(persistentInstance);
        } catch (RuntimeException re) {
            throw re;
        }
    }
    
    public Product findById( java.lang.Long id) {
        try {
            Product instance = (Product) template.get(Product.class, id);
            return instance;
        } catch (RuntimeException re) {
            
            throw re;
        }
    }
    
    
    public List findByExample(Product instance) {
//        try {
//            List results = HibernateUtil.getSessionFactory().getCurrentSession()
//                    .createCriteria("Product")
//                    .add(Example.create(instance))
//            .list();
//            return results;
//        } catch (RuntimeException re) {
//            
//            throw re;
//        }
    	return null;
    }    
    
    public List findByProperty(String propertyName, Object value) {
      try {
         String queryString = "from Product as model where model." 
         						+ propertyName + "= ?";
         
		 return template.find(queryString,new Object[]{value});
      } catch (RuntimeException re) {
         
         throw re;
      }
	}

	
    public Product merge(Product detachedInstance) {   
//        try {
//            Product result = (Product) HibernateUtil.getSessionFactory().getCurrentSession()
//                    .merge(detachedInstance);
//            
//            return result;
//        } catch (RuntimeException re) {
//            
//            throw re;
//        }
    	return null;
    }

    public void saveOrUpdate(Product instance) {

    }
    
    public void lock(Product instance) {

    }

	public List findAllProducts() throws ECPortException {
		try {
			String query = "from Product";
			List list = template.find(query);
			
			return list;
		} catch (RuntimeException re) {
			
			throw new ECPortException(re);
		}
	}
}