c3p0在spring下的配置过程

前几天在配置hibernate的c3p0连接池时报出了死锁的异常。经过一顿的学习，现在项目中已经解决了这个问题，现将其配置记录于下，供自己和有需要的人查阅。
1、在hibernate.properties中添加：

hibernate.connection.provider_class =org.hibernate.connection.C3P0ConnectionProvider

2、将c3p0的常规配置我新建在了自己写的properites中，取名：jdbc.properties,关于c3p0的代码如下：

######C3P0 MySQL config #######
c3p0.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8&mysqlEncoding=utf8 
c3p0.user=root
c3p0.password=root

c3p0.driverClass=com.mysql.jdbc.Driver
c3p0.acquireIncrement=1
c3p0.maxIdleTime=60
c3p0.maxPoolSize=200
c3p0.minPoolSize=50
c3p0.initialPoolSize=300

3、在spring中对DataAccess的配置如下：

	<bean id="dataSource"
		class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<property name="driverClass" value="${c3p0.driverClass}"></property>
		<property name="jdbcUrl" value="${c3p0.url}"></property>
		<property name="user" value="${c3p0.user}"></property>
		<property name="password" value="${c3p0.password}"></property>
		<property name="acquireIncrement" value="${c3p0.acquireIncrement}"></property>
		<property name="initialPoolSize" value="${c3p0.initialPoolSize}"></property>
		<property name="maxIdleTime" value="${c3p0.maxIdleTime}"></property>
		<property name="maxPoolSize" value="${c3p0.maxPoolSize}"></property>
		<property name="minPoolSize" value="${c3p0.minPoolSize}"></property>
		
		<property name="acquireRetryDelay" value="1000"></property>
		<property name="acquireRetryAttempts" value="60"></property>
		<property name="breakAfterAcquireFailure" value="false"></property>
	</bean>
	<!--Hibernate SessionFatory-->
	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="lobHandler" ref="lobHandler" />
		<property name="configLocations">
			<list>
				<value>classpath*:/hibernate/hibernate.cfg.xml</value>
			</list>
		</property>
		<property name="configurationClass"
			value="org.hibernate.cfg.AnnotationConfiguration" />
		<!-- 如果采用hbm 方式
			<property name="mappingDirectoryLocations">
			<list>
			<value>
			classpath*:/org/ustb/mis/model/hbm/
			</value>
			</list>
			</property>
		-->
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					${hibernate.dialect}
				</prop>
				<prop key="hibernate.show_sql">
					${hibernate.show_sql}
				</prop>
				<prop key="hibernate.cache.use_query_cache">
					${hibernate.cache.use_query_cache}
				</prop>
				<prop key="hibernate.cache.provider_class">
					${hibernate.cache.provider_class}
				</prop>
<!-- 配置C3P0ConnectionProvider-->
				<prop key="hibernate.connection.provider_class">
					${hibernate.connection.provider_class}
				</prop>
				<prop key="hibernate.current_session_context_class">
					${hibernate.current_session_context_class}
				</prop>
			</props>
		</property>
	</bean>

其中，属性文件通过如下方式读入：

	<!-- 属性文件读入 -->
	<bean id="propertyConfigurer"
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<list>
				<value>classpath*:hibernate/jdbc.properties</value>
				<value>classpath*:hibernate/hibernate.properties</value>
			</list>
		</property>
	</bean>

对于各个c3p0属性的意义及设置，很多文章都谈到了，我参考的是： http://msq.iteye.com/的文章：C3P0连接池详细配置。

评论

3 楼 Allen_smile 2013-12-20  

很好，非常受用，顶一顶

2 楼 sfc235300 2012-12-26  

maxPoolSize=200
你的initialPoolSize=300
超出最大连接数，这样也可以么？

1 楼 somefuture 2009-11-05  

很有用。。