Spring与Hibernate整合

    Spring与Hibernate整合关键点：
        1） Hibernate的SessionFactory对象交给Spring创建；
        2） hibernate事务交给spring的声明式事务管理。

    SSH整合：
        Spring与Struts；
        Spring与hibernate整合；


    SH整合步骤：
        1）引入jar包
            连接池/数据库驱动包
            Hibernate相关jar
            Spring 核心包(5个)
            Spring aop 包(4个)
            spring-orm-3.2.5.RELEASE.jar        【spring对hibernate的支持】
            spring-tx-3.2.5.RELEASE.jar         【事务相关】
        2）配置
            hibernate.cfg.xml
            bean.xml
        3）搭建环境、单独测试

步骤实现

1. DeptDao.java

// 数据访问层
public class DeptDao {

    // Spring与Hibernate整合： IOC容器注入
    private SessionFactory sessionFactory;
    public void setSessionFactory(SessionFactory sessionFactory) {
        this.sessionFactory = sessionFactory;
    }

    // 保存一个记录
    // Spring与Hibernate整合：事务管理交给Spring
    public void save(Dept dept) {
        sessionFactory.getCurrentSession().save(dept);
    }
}

2. DeptService

public class DeptService {

    private DeptDao deptDao;
    public void setDeptDao(DeptDao deptDao) {
        this.deptDao = deptDao;
    }

    public void save(Dept dept){
        deptDao.save(dept);
    }
}

3. App.java 测试

public class App {

    // 容器
    private ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");

    @Test
    public void testApp() throws Exception {
        DeptService deptServie = (DeptService) ac.getBean("deptService");
        System.out.println(deptServie.getClass());

        deptServie.save(new Dept());
    }
}

4. bean.xml 配置 【Spring管理SessionFactory的3中方式】

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
         http://www.springframework.org/schema/beans/spring-beans.xsd
         http://www.springframework.org/schema/context
         http://www.springframework.org/schema/context/spring-context.xsd
         http://www.springframework.org/schema/aop
         http://www.springframework.org/schema/aop/spring-aop.xsd
         http://www.springframework.org/schema/tx
         http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- dao 实例 -->
    <bean id="deptDao" class="cn.itcast.dao.DeptDao">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

    <!-- service 实例 -->
    <bean id="deptService" class="cn.itcast.service.DeptService">
        <property name="deptDao" ref="deptDao"></property>
    </bean>

    <!-- 数据源配置 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property>
        <property name="user" value="root"></property>
        <property name="password" value="root"></property>
        <property name="initialPoolSize" value="3"></property>
        <property name="maxPoolSize" value="10"></property>
        <property name="maxStatements" value="100"></property>
        <property name="acquireIncrement" value="2"></property>
    </bean>

    <!-- ###########Spring与Hibernate整合  start########### -->

    <!-- 方式（1）直接加载hibernate.cfg.xml文件的方式整合
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
    </bean>    -->

    <!-- 方式（2）连接池交给spring管理  【一部分配置写到hibernate中，一份分在spring中完成】 
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
        <property name="dataSource" ref="dataSource"></property>
    </bean> -->

    <!-- 【推荐】方式（3）所有的配置全部都在Spring配置文件中完成 -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <!-- 注入连接池对象 -->
        <property name="dataSource" ref="dataSource"></property>

        <!-- hibernate常用配置 -->
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>

        <!-- hibernate映射配置 
        <property name="mappingLocations">
            <list>
                <value>classpath:cn/itcast/entity/*.hbm.xml</value>
            </list>
        </property>
        -->
        <property name="mappingDirectoryLocations">
            <list>
                <value>classpath:cn/itcast/entity/</value>
            </list>
        </property>
    </bean>



    <!-- ###########Spring与Hibernate整合  end########### -->

    <!-- 事务配置 -->
    <!-- a. 配置事务管理器类 -->
    <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>
    <!-- b. 配置事务增强(拦截到方法后如果管理事务?) -->
    <tx:advice id="txAdvice" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="*" read-only="false"/>
        </tx:attributes>
    </tx:advice>
    <!-- c. Aop配置 -->
    <aop:config>
         <aop:pointcut expression="execution(* cn.itcast.service.*.*(..))" id="pt"/>
         <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
    </aop:config>
</beans>