为什么要整合Hibernate？

1、使用Spring的IOC功能管理SessionFactory对象

 LocalSessionFactoryBean

2、使用Spring管理Session对象

 HibernateTemplate

3、使用Spring的功能实现声明式的事务管理

整合Hibernate的步骤：

1、配置SessionFactory（能够自己主动完毕）

 <bean id="sessionFactory"  class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

  <property name="configLocation"

   value="classpath:hibernate.cfg.xml">

  </property>

 </bean>

2、配置HibernateTemplate，用于完毕数据操作

 <bean id="hibernateTemplete" class="org.springframework.orm.hibernate3.HibernateTemplate">

  <property name="sessionFactory" ref="sessionFactory"></property>

 </bean>

3、让Common继承HibernateDaoSupport类，该类提供了HibernateTemplate的getter和setter方法。

4、将hibernateTemplete注入到Common中

 <bean id="common" class="com.aptech.common.Common">

  <property name="hibernateTemplate" ref="hibernateTemplete"></property>

 </bean>

5、将Common的方法改动成hibernateTemplete的操作。

package com.aptech.common;

import java.sql.SQLException;

import java.util.List;

import org.hibernate.HibernateException;

import org.hibernate.Session;

import org.springframework.dao.DataAccessException;

import org.springframework.orm.hibernate3.HibernateCallback;

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

import com.aptech.exception.CommonException;

import com.aptech.htm.HibernateSessionFactory;

/**

 * 通用类,不再负责事务处理

 * 目标对象

 * @author 李赞红

 *

 * @param <POJO>

 */

public class Common<POJO> extends HibernateDaoSupport implements ICommon<POJO> {

 public void insertObject(POJO pojo) throws CommonException {

  try {

   this.getHibernateTemplate().save(pojo);

  } catch (DataAccessException e) {

   e.printStackTrace();

   throw new CommonException(e);

  }

 }

 public void updateObject(POJO pojo) throws CommonException {

  try {

   this.getHibernateTemplate().update(pojo);

  } catch (DataAccessException e) {

   e.printStackTrace();

   throw new CommonException(e);

  }

 }

 public void deleteObject(Class theClass, long id) throws CommonException {

  try {

   Object obj = this.getHibernateTemplate().load(theClass, id);

   this.getHibernateTemplate().delete(obj);

  } catch (DataAccessException e) {

   // TODO Auto-generated catch block

   e.printStackTrace();

   throw new CommonException(e);

  }

 }

 public POJO loadObject(Class theClass, long id) throws CommonException {

  try {

   Object obj = this.getHibernateTemplate().load(theClass, id);

   return (POJO) obj;

  } catch (DataAccessException e) {

   // TODO Auto-generated catch block

   e.printStackTrace();

   throw new CommonException(e);

  }

 }

 public List queryObjects(final String hql) throws CommonException {

  class Hc implements HibernateCallback{

   public Object doInHibernate(Session session)

     throws HibernateException, SQLException {

    return session.createQuery(hql).list();

   }

  }

  

  try {

   return this.getHibernateTemplate().executeFind(new Hc());

  } catch (DataAccessException e) {

   e.printStackTrace();

   throw new CommonException(e);

  }

 }

 public List queryObjects(Class theClazz) throws CommonException {

  return this.queryObjects("from " + theClazz.getSimpleName());

 }

}

6、配置事务

<!-- 事务管理器，相当于TransactionProxy,定义事务的开启、提交、回滚 -->

 <bean id="htm" class="org.springframework.orm.hibernate3.HibernateTransactionManager">

  <property name="sessionFactory">

   <ref bean="sessionFactory"/>

  </property>

 </bean>

 <bean id="ti" class="org.springframework.transaction.interceptor.TransactionInterceptor">

  <property name="transactionManager">

   <ref bean="htm"/>

  </property>

  <property name="transactionAttributes">

   <props>

    <!-- key:方法名称 -->

    <prop key="insert*">PROPAGATION_REQUIRED</prop>

    <prop key="update*">PROPAGATION_REQUIRED</prop>

    <prop key="delete*">PROPAGATION_REQUIRED</prop>

    <prop key="load*">PROPAGATION_REQUIRED,readOnly</prop>

    <prop key="query*">PROPAGATION_REQUIRED,readOnly</prop>

   </props>

  </property>

 </bean>

 

 <!-- 自己主动代理，代理业务对象 -->

 <bean class="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator">

  <property name="beanNames">

   <list>

    <value>common</value>

   </list>

  </property>

  <property name="interceptorNames">

   <list>

    <value>ti</value>

   </list>

  </property>

 </bean>

7、将common注入Dao

 <bean id="baseDao" abstract="true">

  <property name="common">

   <ref bean="common"/>

  </property>

 </bean>

 

 <bean id="udao" class="com.aptech.dao.impl.UserDao" parent="baseDao"></bean>

 <bean id="rdao" class="com.aptech.dao.impl.RoleDao" parent="baseDao"></bean>

8、将Dao注入Service

 <bean id="grantService" class="com.aptech.service.impl.GrantService">

  <property name="rdao" ref="rdao"></property>

  <property name="udao" ref="udao"></property>

 </bean>