Spring整合Hibernate(2)----注解方式

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承接上一篇文章：《Spring整合Hibernate(1)-----applicationContext.xml 设值注入依赖方式》

这篇主要介绍一下Spring整合Hibernate(2)----注解方式：

和设置注入的依赖方式基本上一样，这里只讨论具体的不同点即可：

最大一个不同的点就是注解方式不需要写实体类的映射文件，直接使用配置实体类即可，Spring框架会自己帮我们完成实体类

到数据库表之间的ORM映射。而applicationContext.xml文件就需要写ORM映射文件。

注解方式下的applicationContext.xml文件配置如下：

<?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:aop="http://www.springframework.org/schema/aop"       xmlns:tx="http://www.springframework.org/schema/tx"       xmlns:context="http://www.springframework.org/schema/context"       xsi:schemaLocation="           http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans.xsd           http://www.springframework.org/schema/tx           http://www.springframework.org/schema/tx/spring-tx.xsd           http://www.springframework.org/schema/aop           http://www.springframework.org/schema/aop/spring-aop.xsd           http://www.springframework.org/schema/context           http://www.springframework.org/schema/context/spring-context.xsd">  <!--自动扫描包-->    <context:component-scan base-package="com.test" /> <!--加载配置文件-->    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations">          <list>              <value>classpath:jdbc.properties</value>          </list>        </property>      </bean>  <!--配置连接池数据源-->    <bean id="c3p0DataSource" destroy-method="close"          class="com.mchange.v2.c3p0.ComboPooledDataSource">          <property name="driverClass" value="${driverClass}" />          <property name="jdbcUrl" value="${url}" />          <property name="user" value="${user}" />          <property name="password" value="${password}" />          <property name="initialPoolSize" value="${initialPoolSize}" />          <property name="minPoolSize" value="${minPoolSize}" />          <property name="maxPoolSize" value="${maxPoolSize}" />          <property name="maxIdleTime" value="${maxIdleTime}" />      </bean><!--配置sessionFactory-->    <bean id="sessionFactory"          class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">          <property name="dataSource" ref="c3p0DataSource" />          <property name="packagesToScan">              <list>                  <value>com.test.bean</value>  <!--这里只需要配置bean即可-->            </list>          </property>          <property name="hibernateProperties">              <props>                  <prop key="hibernate.dialect">${dialect}</prop>                  <prop key="hibernate.show_sql">${show_sql}</prop>                  <prop key="hibernate.format_sql">${format_sql}</prop>                  <prop key="hibernate.use_sql_commants">${use_sql_comments}</prop>                  <prop key="hibernate.hbm2ddl.auto">${hbm2ddl.auto}</prop>              </props>          </property>      </bean>      <bean id="txManager"          class="org.springframework.orm.hibernate4.HibernateTransactionManager">          <property name="sessionFactory" ref="sessionFactory" />      </bean>      <tx:advice id="txAdvice" transaction-manager="txManager">          <tx:attributes>              <tx:method name="get*" read-only="true" />              <tx:method name="*" />          </tx:attributes>      </tx:advice>      <aop:config>          <aop:pointcut id="bizMethods" expression="execution(* com.test.biz.*.*(..))" />          <aop:advisor advice-ref="txAdvice" pointcut-ref="bizMethods" />      </aop:config>  </beans>

设置注入依赖的方式的applicationContext.xml文件的配置如下：

<?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: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/tx                        http://www.springframework.org/schema/tx/spring-tx.xsd                        http://www.springframework.org/schema/aop                        http://www.springframework.org/schema/aop/spring-aop.xsd">                 <!-- 让spring 去读取指定路径下的资源文件 -->      <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="locations" value="classpath:jdbc.properties"/>      </bean>            <!-- 配置c3p0连接池 -->      <bean id="c3p0Source" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">        <property name="driverClass" value="${driverClass}" />        <property name="jdbcUrl" value="${url}" />        <property name="user" value="${user}" />        <property name="password" value="${password}" />        <property name="initialPoolSize" value="${initialPoolSize}" />        <property name="minPoolSize" value="${minPoolSize}" />        <property name="maxPoolSize" value="${maxPoolSize}" />        <property name="maxIdleTime" value="${maxIdleTime}" />      </bean>            <!-- 配置SessionFactory -->      <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">        <property name="dataSource" ref="c3p0Source" />        <property name="mappingResources">            <list>              <value>/com/cdzg/spring/bean/User.hbm.xml</value>  <!-- 需要写ORM映射文件 -->          </list>        </property>        <property name="hibernateProperties">          <props>                  <prop key="hibernate.dialect">${dialect}</prop>                  <prop key="hibernate.hbm2ddl.auto">${hbm2ddl.auto}</prop>                  <prop key="hibernate.show_sql">${show_sql}</prop>                  <prop key="hibernate.format_sql">${format_sql}</prop>                  <prop key="hibernate.use_sql_comments">${use_sql_comments}</prop>              </props>        </property>      </bean>            <!-- 配置事务管理器 -->      <bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">        <property name="sessionFactory" ref="sessionFactory" />      </bean>            <!-- 定义事务通知 -->      <tx:advice id="txAdvice" transaction-manager="txManager">        <tx:attributes>          <tx:method name="get*" read-only="true"/>          <tx:method name="*"/>        </tx:attributes>      </tx:advice>              <!-- 定义事务切面，并应用事务通知 -->           <aop:config>        <aop:pointcut id="xxxBizImpl" expression="execution(* com.cdzg.spring.biz.*.*(..))"/>        <aop:advisor pointcut-ref="xxxBizImpl" advice-ref="txAdvice"/>       </aop:config>                 <bean id="userDaoImpl" class="com.cdzg.spring.dao.impl.UserDaoImpl">          <property name="sessionFactory" ref="sessionFactory" />      </bean>      <bean id="userBizImpl" class="com.cdzg.spring.biz.impl.UserBizImpl">          <property name="userDao" ref="userDaoImpl" />      </bean>      <bean id="userAction" class="com.cdzg.spring.web.actions.UserAction">          <property name="userBiz" ref="userBizImpl" />      </bean>  </beans>

读者自行对比上面两个applicationContext.xml配置文件，即可。

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