关于spring配置文件的一些注解

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:db.properties</value>
            </list>
        </property>
</bean>

 这样我可以在其它配置文件中用${key}来取到db.properties里面的值，比如下面的代码，  dataSource定义数据源：

 

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
		<property name="url" value="${connection.url}" />
		<property name="username" value="${connection.username}" />
		<property name="password" value="${connection.password}" />
</bean>

 

SessionFactory配置定义：

<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" >
    	<property name="dataSource" ref="dataSource"/> <!-- 指定数据源 -->
    	
        <property name="hibernateProperties"> <!--指定Hibernate属性 -->  
            <props>
                <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.query.substitutions">${hibernate.query.substitutions}</prop>
                <prop key="hibernate.default_batch_fetch_size">${hibernate.default_batch_fetch_size}</prop>
                <prop key="hibernate.max_fetch_depth">${hibernate.max_fetch_depth}</prop>
                <prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</prop>
                <prop key="hibernate.bytecode.use_reflection_optimizer">${hibernate.bytecode.use_reflection_optimizer}</prop>
                
                <prop key="hibernate.cache.use_second_level_cache">${hibernate.cache.use_second_level_cache}</prop>
                <prop key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop>
                <prop key="hibernate.cache.region.factory_class">${hibernate.cache.region.factory_class}</prop>
                <prop key="net.sf.ehcache.configurationResourceName">${net.sf.ehcache.configurationResourceName}</prop>
                <prop key="hibernate.cache.use_structured_entries">${hibernate.cache.use_structured_entries}</prop>
            </props>
        </property>
        <property name="mappingLocations"> <!--指定映射定义-->
          <list>
              <value>classpath*:*.hbm.xml</value>
              <value>classpath*:*.hbm.xml</value>
          </list>
        </property>
</bean>

 

其他配置定义：

<!-- 开启AOP监听 只对当前配置文件有效--> 
<aop:aspectj-autoproxy expose-proxy="true"/>
	
<!-- 开启注解事务 只对当前配置文件有效 -->
<tx:annotation-driven transaction-manager="transactionManager"/>

<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"/>
</bean>