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：
Xml代码
<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> 
lt;!-- 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> 

<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：
Xml代码
<!-- 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> 

<!-- 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。