JDBC、C3P0、DBCP三种链接数据库配置

第一种

	<!--内置的链接池  先配置链接池 -->
	<!-- <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" ></property>
		<property name="url" value="jdbc:mysql://rm-uf63dht8ci6vxa03lo.mysql.rds.aliyuncs.com:3306/spring_day03"></property>
		<property name="username" value="root"></property>
		<property name="password" value="WWWqq2_09_01334"></property>
	</bean>
	 -->

	<!-- 配置jdbc模板类 -->
	<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

第二种

	 <!--配置C3P0连接池  -->
	 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
	 	<property name="driverClass" value="com.mysql.jdbc.Driver" />
	 	<property name="jdbcUrl" value="jdbc:mysql://rm-uf63dht8ci6vxa03lo.mysql.rds.aliyuncs.com:3306/spring_day03" />
	 	<property name="user" value="root" />
	 	<property name="password" value="WWWqq2_09_01334" />
	 </bean>

第三种

	 <!--配置DBCP的连接池  -->
	<!--  <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
	 	<property name="driverClassName" value="com.mysql.jdbc.Driver" />
	 	<property name="url" value="jdbc:mysql://rm-uf63dht8ci6vxa03lo.mysql.rds.aliyuncs.com:3306/spring_day03" />
	 	<property name="username" value="root" />
	 	<property name="password" value="WWWqq2_09_01334" />
	 </bean> -->