SSH整合c3p0连接池的配置

1.Hibernate3 已经取消了对DBCP的支持，原因是当DBCP连接因为某个原因断掉后，不会自动重新连接，必须重启服务器。

2.在dbcp方式的连接池下，如果有下面的代码，数据不会保存到数据库

<property name="defaultAutoCommit"> <value>false</value> </property>

3.c3p0连接池的配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
	<!-- <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName"> <value>org.gjt.mm.mysql.Driver</value> </property> <property name="url"> <value>jdbc:mysql://localhost:3306/test</value> </property> <property name="username"> <value>lixueli</value> </property> <property name="password"> <value>lixueli</value> </property> <property name="maxActive"> <value>25</value> </property> <property name="maxIdle"> <value>20</value> </property> <property name="maxWait"> <value>1000</value> </property> <property name="defaultAutoCommit"> <value>false</value> </property> </bean> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="dataSource"> <ref bean="dataSource" /> </property> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect"> org.hibernate.dialect.MySQLDialect </prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> </props> </property> <property name="mappingResources"> <list> <value>com/lixueli/business/model/Book.hbm.xml</value> <value>com/lixueli/business/model/User.hbm.xml</value> <value>com/lixueli/business/model/Event.hbm.xml</value> <value>com/lixueli/business/model/Person.hbm.xml</value> <value>com/lixueli/business/model/Address.hbm.xml</value> </list> </property> </bean> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName"> <value>oracle.jdbc.driver.OracleDriver</value> </property> <property name="url"> <value>jdbc:oracle:thin:@127.0.0.1:1521:orcl</value> </property> <property name="username"> <value>lixueli</value> </property> <property name="password"> <value>lixueli</value> </property> <property name="maxActive"> <value>25</value> </property> <property name="maxIdle"> <value>20</value> </property> <property name="maxWait"> <value>1000</value> </property> </bean> -->
	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
		<property name="jdbcUrl" value="jdbc:oracle:thin:@127.0.0.1:1521:orcl"/>
		<property name="driverClass" value="oracle.jdbc.driver.OracleDriver"/>
		<property name="user" value="lixueli"/>
		<property name="password" value="lixueli"/>
		<!--连接池中保留的最大连接数。Default: 15 -->
		<property name="maxPoolSize" value="20"/>
		<!--连接池中保留的最小连接数。-->
		<property name="minPoolSize" value="2"/>
		<!--初始化时获取的连接数，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
		<property name="initialPoolSize">
			<value>10</value>
		</property>
		<!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->
		<property name="maxIdleTime" value="60"/>
		<property name="idleConnectionTestPeriod" value="60">
			<!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 -->
		</property>
		<!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
		<property name="acquireIncrement">
			<value>5</value>
		</property>
		<!--JDBC的标准参数，用以控制数据源内加载的PreparedStatements数量。但由于预缓存的statements 属于单个connection而不是整个连接池。所以设置这个参数需要考虑到多方面的因素。 如果maxStatements与maxStatementsPerConnection均为0，则缓存被关闭。Default: 0-->
		<property name="maxStatements">
			<value>0</value>
		</property>
		<!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 -->
		<property name="acquireRetryAttempts">
			<value>30</value>
		</property>
		<!--获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效 保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试 获取连接失败后该数据源将申明已断开并永久关闭。Default: false-->
		<property name="breakAfterAcquireFailure">
			<value>true</value>
		</property>
		<!--因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的 时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable 等方法来提升连接测试的性能。Default: false -->
		<property name="testConnectionOnCheckout">
			<value>false</value>
		</property>
	</bean>
	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource">
			<ref bean="dataSource"/>
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect"> org.hibernate.dialect.Oracle10gDialect </prop>
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.format_sql">true</prop>
				<prop key="hibernate.hbm2ddl.auto">update</prop>
			</props>
		</property>
		<property name="mappingResources">
			<list>
				<value>com/lixueli/business/model/Book.hbm.xml</value>
				<value>com/lixueli/business/model/User.hbm.xml</value>
				<value>com/lixueli/business/model/Event.hbm.xml</value>
				<value>com/lixueli/business/model/Person.hbm.xml</value>
				<value>com/lixueli/business/model/Address.hbm.xml</value>
			</list>
		</property>
	</bean>
</beans>