categorydao.java

模仿当当网基于struts+hierbernate与mysql的商务网站。

package org.whatisjava.dang.dao;

import java.util.List;

import org.hibernate.FlushMode;
import org.hibernate.Query;
import org.hibernate.Session;
import org.whatisjava.dang.domain.Category;

public class CategoryDao {
	public Category findById(int id){
		Session session=HbSessionFactory.getSession();
		session.setFlushMode(FlushMode.NEVER);
		Category category=(Category)session.get(Category.class, id);
		
		session.close();
		return category;
	}
	public List<Category> findByParentId(int pId) {
		Session session=HbSessionFactory.getSession();
		session.setFlushMode(FlushMode.NEVER);
		Query query=session.createQuery("from Category ca where ca.parent_id=?");
		query.setInteger(0, pId);
		List<Category> list=query.list();
		

		
		session.close();
		return list;
	}
}