Spring 整合JDBC,s2sh集成DAO介绍

import java.sql.SQLException;
import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.LockMode;
import org.hibernate.Session;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.HibernateCallback;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.svse.entity.TEmp;

/**
 * S2SH 集成中的DAO 方法详细介绍
 * 
 * @see com.svse.entity.TEmp
 * @author MyEclipse Persistence Tools
 */

public class TEmpDAO extends HibernateDaoSupport {
	private static final Logger log = LoggerFactory.getLogger(TEmpDAO.class);
	// property constants
	public static final String _ENAME = "EName";
	public static final String _ESEX = "ESex";

	protected void initDao() {
		// do nothing
	}

	/****************************** 自定义方法，根据需求编写对应的方法 ********************************************/

	// 专用查询结果集的 , 使用execiteFind();方法查询
	public List getAll() {
		return this.getHibernateTemplate().executeFind(new HibernateCallback() {

			//返回需要对应的对象
			public Object doInHibernate(Session session)
					throws HibernateException, SQLException {
			
				//此时有session ，方便操作，可以使用HQL 查询，也可以使用QBC 查询
				List  ar = session.createCriteria(TEmp.class).createCriteria("TDept").list();
				return ar;
			}
		});
	}
	
	//使用find方法查询
	public List testFind(int id,String name){
		return this.getHibernateTemplate().find("From TEmp a inner join fetch a.TDept where a.EId>? and a.EName like ?", 
				new Object[]{id,'%'+name});
	}
	
	//等等，可以根据需要写各种方法

	/*************************************** 下面的方法都是系统自动生成的 **********************************/

	// 增加
	public void save(TEmp transientInstance) {
		log.debug("saving TEmp instance");
		try {
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	// 删除
	public void delete(TEmp persistentInstance) {
		log.debug("deleting TEmp instance");
		try {
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	// 根据ID 查一个对象
	public TEmp findById(java.lang.Integer id) {
		log.debug("getting TEmp instance with id: " + id);
		try {
			TEmp instance = (TEmp) getHibernateTemplate().get(
					"com.svse.entity.TEmp", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	// 根据对象查
	public List findByExample(TEmp instance) {
		log.debug("finding TEmp instance by example");
		try {
			List results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	// 根据属性查
	public List findByProperty(String propertyName, Object value) {
		log.debug("finding TEmp instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from TEmp as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	// 根据名称
	public List findByEName(Object EName) {
		return findByProperty(_ENAME, EName);
	}

	public List findByESex(Object ESex) {
		return findByProperty(_ESEX, ESex);
	}

	// 查询所有
	public List findAll() {
		log.debug("finding all TEmp instances");
		try {
			String queryString = "from TEmp a inner join fetch a.TDept";
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	// 修改
	public TEmp merge(TEmp detachedInstance) {
		log.debug("merging TEmp instance");
		try {
			TEmp result = (TEmp) getHibernateTemplate().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(TEmp instance) {
		log.debug("attaching dirty TEmp instance");
		try {
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(TEmp instance) {
		log.debug("attaching clean TEmp instance");
		try {
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	// 获取当前DAO 对象
	public static TEmpDAO getFromApplicationContext(ApplicationContext ctx) {
		return (TEmpDAO) ctx.getBean("TEmpDAO");
	}
}