关于hibernate 、ibatis、jdbctemplate对Bbasedao的封装已经使用方式

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/*************Hibernate封装BaseDao(原生态)*************/

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概要说明：

Hibernate封装BaseDao主要是通过调用HibernateUtil(这个类也是封装的)来实现基本的CURD操作;在HibernateUtil中，通过Configuration实例构建SessionFactory，SessionFactory用来创建Session实例，Configuration实例根据当前的配置信息，构造SessionFactory实例并返回。一旦SessionFactory构造完毕，即被赋予特定的配置信息。Session是持久层操作的基础，相当于JDBC的Connection。通过SessionFactory实例构建。Session实例提供的saveOrUpdate、delete和createQuery方法分别实现了数据库的插入更新、删除和查询操作，简化了数据库的基本操作

代码实例：

*  HibernateUtil：Hibernate工具类,Hibernate映射操作公用类 负责初始化、打开连接、获取连接、关闭连接等操作;

/*
*Hibernate工具类,Hibernate映射操作公用类
*负责初始化、打开连接、获取连接、关闭连接等操作
*/

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
    private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";//配置文件位置 
    private static final ThreadLocal threadLocal = new ThreadLocal();//线程 
    private static Configuration configuration = new Configuration();
    private static org.hibernate.SessionFactory sessionFactory;//会话工厂
    private static String configFile = CONFIG_FILE_LOCATION;

    static {
        try {
            configuration.configure(configFile);
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /***
     * 获得session
     * 
     * @return
     * @throws HibernateException
     */
    public static Session getSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

        if (session == null || !session.isOpen()) {
            if (sessionFactory == null) {
                rebuildSessionFactory();
            }
            session = (sessionFactory != null) ? sessionFactory.openSession()
                    : null;
            threadLocal.set(session);
        }

        return session;
    }

    /*
    *重新创建SessionFactory
    */
    public static void rebuildSessionFactory() {
        try {
            configuration.configure(configFile);
            sessionFactory = configuration.buildSessionFactory();
        } catch (Exception e) {
            System.err.println("无法 在 baseDao 中 创建 SessionFactory ");
            e.printStackTrace();
        }
    }

    /*
    *获取当前session
    */
    public static Session currentSession() throws HibernateException {
        Session session = sessionFactory.openSession();
        return session;
    }

    /*
    *关闭session
    */
    public static void closeSession(Session session) {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);
        if (session != null) {
            session.close();
        }

    } 

    /**
    * return session factory
    */
    public static org.hibernate.SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    /**
    * return session factory
    * 

    * session factory will be rebuilded in the next call
    */
    public static void setConfigFile(String configFile) {
        HibernateUtil.configFile = configFile;
        sessionFactory = null;
    }

    /**
     * return hibernate configuration
     */
    public static Configuration getConfiguration() {
        return configuration;
    }
}

*HibernateBaseDao：调用Hibernate工具类HibernateUtil进行系列CURD操作;

/*
*调用Hibernate工具类HibernateUtil进行系列CURD操作
*/

import java.io.Serializable;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.juren.util.HibernateUtil;

public class HibernateBaseDao  {

    /**
     * 添加
     *
     * @param obj
     */
    public void add(Object obj) {
        Session session = null;
        Transaction tx = null;
        try {
            session = HibernateUtil.getSession();
            tx = session.beginTransaction();
            session.save(obj);
            tx.commit();

        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
        } finally {
            if (session != null) {
                session.close();
            }
        }
    }

    /**
     * 删除
     *
     * @param obj
     */
    public void delete(Object obj) {
        Session session = null;
        Transaction tx = null;
        try {
            session = HibernateUtil.getSession();
            tx = session.beginTransaction();
            session.delete(obj);
            tx.commit();
        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
        } finally {
            if (session != null) {
                session.close();
            }
        }
    }

    /**
     * 根据主键删除
     *
     * @param clazz
     * @param id
     */
    public void deleteById(Class clazz, Serializable id) {
        Session session = null;
        Transaction tx = null;
        try {
            session = HibernateUtil.getSession();
            session.delete(session.get(clazz, id));
            tx.commit();
        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
        } finally {
            if (session != null) {
                session.close();
            }
        }
    }

    /**
     * 修改
     *
     * @param obj
     */
    public void update(Object obj) {
        Session session = null;
        Transaction tx = null;
        try {
            session = HibernateUtil.getSession();
            tx = session.beginTransaction();
            session.update(obj);
            tx.commit();
        } catch (Exception e) {
            if (tx != null) {
                tx.rollback();
            }
        } finally {
            if (session != null) {
                session.close();
            }
        }

    }

    /**
     * 根据主键查询
     *
     * @param clazz
     * @param id
     * @return
     */
    public Object get(Class clazz, Serializable id) {
        Session session = null;

        try {
            session = HibernateUtil.getSession();
            Object obj = session.get(clazz, id);
            return obj;
        } finally {
            if (session != null) {
                session.close();
            }
        }

    }

    /**
     * 根据多个属性查询
     *
     * @param clazz
     * @param strs
     * @return
     */
    public Object getByNProperty(Class clazz, String... strs) {

        if (strs != null && strs.length != 0 && 0 != strs.length % 2) {
            StringBuffer hql = new StringBuffer("select model from "
                    + clazz.getName() + " as model where ");
            for (int i = 0; i < strs.length; i += 2) {
                hql.append(" " + strs[i] + " = " + strs[i + 1]);
            }

            Session session = null;
            try {
                session = HibernateUtil.getSession();
                List