【皇甫】☀那些数据源...

几种数据源

Test：

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<!-- 1.dao -->   
   <bean id="bookDao" class="cn.happy.dao.impl.BookDAOImpl">
     <!--  <property name="jdbcTemplate" ref="myJDBCTemplate"></property> -->
     <property name="dataSource" ref="dataSource"></property>
   </bean>
   
    <!-- 2.service -->  
     <bean id="bookService" class="cn.happy.service.impl.BookServiceImpl">
        <property name="dao" ref="bookDao"></property>
     </bean>
     
     <!-- c3p0数据源 -->
   <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
      <property name="driverClass" value="${jdbc.driver}"></property>
      <property name="jdbcUrl" value="${jdbc.url}"></property>
      <property name="user" value="${jdbc.username}"></property>
      <property name="password" value="${jdbc.password}"></property>
   </bean> 
   
   <!-- 4.注册jdbc属性 -->
   <context:property-placeholder location="classpath:jdb.properties"/>

  <!-- 5.注册jdbcTemplate -->
 <!--  <bean id="myJDBCTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
       <property name="dataSource" ref="dataSource"></property>
  </bean> -->
   
    <!-- 3.注册数据源  spring -->
  <!--  <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
      <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
      <property name="url" value="jdbc:mysql:///BookShop"></property>
      <property name="username" value="root"></property>
      <property name="password" value="root"></property>
   </bean> -->
   
    <!-- 3.注册数据源  dbcp -->
  <!--   <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
      <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
      <property name="url" value="jdbc:mysql:///BookShop"></property>
      <property name="username" value="root"></property>
      <property name="password" value="root"></property>
   </bean>  -->
   
   

  <!-- 4.注册jdbc属性 -->
  <!--  <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
     <property name="location" value="classpath:jdb.properties"></property>
   </bean> -->

<!-- 1.dao -->   
    <bean id="bookDao" class="cn.happy.dao.impl.BookDAOImpl"></bean>
   
   
    <!-- 2.service -->  
     <bean id="bookService" class="cn.happy.service.impl.BookServiceImpl">
        <property name="dao" ref="bookDao"></property>
     </bean>