数据源配置

<!-- spring内置，springJdbc，配置数据源 ，在每个链接请求是都会新建链接，没有进行池化管理，生产环境不适合使用-->
<bean id="dataSource"
     class="org.springframework.jdbc.datasource.DriverManagerDataSource">
     <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
     <property name="url" value="jdbc:mysql://localhost:3306/test?characterEncoding=UTF      -8"></property>
     <property name="username" value="root"></property>
     <property name="password" value="root"></property>
</bean>

<!--c3p0数据源连接池-->
<!-- <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
       <property name="user" value="root"></property>
       <property name="password" value="root"></property>
       <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
       <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8"></property>
   </bean> -->
   
   <!--dbcp数据源连接池-->  
   <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
           <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
           <property name="url" value="jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8"></property>
           <property name="username" value="root"></property>
           <property name="password" value="root"></property>
   </bean>
 
    
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>