Hibernate实现DAO的常用CRUD操作

package com.utstar.nms.vmm.spring.dao;



import java.io.Serializable;

import java.util.List;

import org.springframework.orm.hibernate3.support.HibernateDaoSupport;





import com.utstar.nms.vmm.spring.util.GenericsUtils;





 public class HibernateEntityDao<T> extends HibernateDaoSupport

		implements EntityDao<T> {



	protected Class<T> entityClass;



	public HibernateEntityDao() {

		entityClass = GenericsUtils.getSuperClassGenricType(getClass());

	}



	/**

	 * find an object by its id

	 * @param id

	 * @return an object

	 */

	public T findByID(Serializable id) {

		return (T) getHibernateTemplate().get(entityClass, id);

	}

	

	/**

	 * @return find all objects

	 */

	public List<T> findAll() 

	{

		return getHibernateTemplate().loadAll(entityClass);

		

	}



	/**

	 * find objects  by sql(jdbc) or hql(hibernate)

	 * @param ql

	 * @param values parameter that

	 * @return an objects list of the query result

	 */

	public List<T> findByQL(String hql, Object... values) 

	{

		return getHibernateTemplate().find(hql, values);

	}



	/**

	 * save the object input

	 * @param o

	 */

	public void save(Object object)

	{

		getHibernateTemplate().save(object);

	}

	

	/**

	 * update the object input

	 * @param o

	 */

	public void update(Object object)

	{

		getHibernateTemplate().update(object);

	}

	

	/**

	 * saveOrUpdate the object input

	 * @param o

	 */

	public void saveOrUpdate(Object object)

	{

		getHibernateTemplate().saveOrUpdate(object);

	}

   

	/**

	 * delete the object input

	 * @param o

	 */



	public void remove(Object object)

	{

		/*delete the object*/

		getHibernateTemplate().delete(object);

	}

	/**

	 * delete an object by its id

	 * @param id

	 */

	public void removeById(Serializable id)

	{

		/*find the object by id*/

		Object object=findByID(id);

		

		/*delete the object*/

		remove(object);

	}





	



}