Spring中JDBC.DBCP.C3P0连接池的配置

1. 导入相关jar包

2. 在xml文件中applicationContext.xml配置

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
   	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
   	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
   	xsi:schemaLocation="http://www.springframework.org/schema/beans 
   	http://www.springframework.org/schema/beans/spring-beans.xsd
   	http://www.springframework.org/schema/context
   	http://www.springframework.org/schema/context/spring-context.xsd
   	http://www.springframework.org/schema/aop
   	http://www.springframework.org/schema/aop/spring-aop.xsd
   	http://www.springframework.org/schema/tx 
   	http://www.springframework.org/schema/tx/spring-tx.xsd">
   
   	<!-- 配置jdbc内置连接池 -->
   	<bean id="dataSource"
   		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
   		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
   		<property name="url" value="jdbc:mysql:///springdate?useUnicode=true&amp;characterEncoding=utf8" />
   		<property name="username" value="root" />
   		<property name="password" value="" />
   	</bean>
   	<!-- dbcp的连接池配置 -->
   	<bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource">
   		<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
   		<property name="url" value="jdbc:mysql:///springdate?useUnicode=true&amp;characterEncoding=utf8"/>
   		<property name="username" value="root"/>
   		<property name="password" value=""/>
   	</bean>
   	<!-- C3P0连接池 -->
   	<bean id="dataSource2" class="com.mchange.v2.c3p0.ComboPooledDataSource">
   	<property name="driverClass" value="com.mysql.jdbc.Driver"/>
   		<property name="jdbcUrl" value="jdbc:mysql:///springdate?useUnicode=true&amp;characterEncoding=utf8"/>
   		<property name="user" value="root"/>
   		<property name="password" value=""/>
   	</bean>
   
   	<!-- 配置Spring的JDBC的模板========================= -->
   	<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
   		<property name="dataSource" ref="dataSource2" />
   	</bean>
   
   </beans>