hibernate3配置c3p0连接池

Hibernate.cfg.xml配置文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

	<session-factory>
		<property name="connection.url">jdbc:oracle:thin:@hotname:1521:service_name</property>
		<property name="connection.username">username</property>
		<property name="connection.password">password</property>
		<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
		<property name="connection.characterEncoding">UTF-8</property>
		<property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
		<property name="hibernate.show_sql">True</property>		
		<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
		<property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
		<property name="hibernate.c3p0.max_size">20</property>
		<property name="hibernate.c3p0.min_size">5</property>
		<property name="hibernate.c3p0.timeout">120</property>
		<property name="hibernate.c3p0.max_statements">100</property>
		<property name="hibernate.c3p0.idle_test_period">120</property>
		<property name="hibernate.c3p0.acquire_increment">2</property>
		
		<mapping resource="package/*.hbm.xml" />
	</session-factory>

</hibernate-configuration>