web开发中添加数据源实现思路

<bean id="datasource" class="org.springframework.jdbc.datasource.drivermanagerdatasource">
   <property name="driverclassname">
      <value>org.logicalcobwebs.proxool.proxooldriver</value>
   </property>
   <property name="url">
      <value>proxool.db</value>
   </property>
 </bean>

<bean id="sessionfactory" class="org.springframework.orm.hibernate3.localsessionfactorybean">
    <property name="datasource">
      <ref local="datasource"></ref>
   </property>
   <property name="hibernateproperties">
     <props>
       <prop key="hibernate.connection.provider_class"> org.hibernate.connection.c3p0connectionprovider</prop>
       <!-- 是否将运行期生成的sql输出到日志以供调试 -->
       <prop key="hibernate.show_sql">true</prop>
       <!--指定连接的语言-->
       <prop key="dialect"> org.hibernate.dialect.mysqldialect </prop>
       <!--是否收集有助于性能调节的统计数据-->
       <prop key="hibernate.generate_statistics">true</prop>
       <!--是否自动重新连接-->
       <prop key="hibernate.autoreconnect">true</prop>
       <!--是否自动释放连接-->
       <prop key="hibernate.connection.release_mode">auto</prop>
       <!--缓存配置-->
       <prop key="hibernate.cache.provider_class">org.hibernate.cache.ehcacheprovider </prop>
       <prop key="hibernate.cache.use_second_level_cache"> false  </prop>
       <prop key="hibernate.cache.use_query_cache">false</prop>
    </props>
 </property>
 <property name="mappingresources">
    <list>
      <value>映射表</value>
    </list>
 </property>
 </bean>

 <bean id="jdbctemplatelr" class="org.springframework.jdbc.core.jdbctemplate">
   <property name="datasource">
      <ref bean="datasourcelrsql"/>
   </property>
 </bean>
 <bean id="basepagedao" class="com.basepagedaohibernateimpl">
   <property name="jdbctemplate">
      <ref bean="jdbctemplatelr"/>
   </property>
 </bean>