在applicationContext.xml中配置的c3p0

在applicationContext.xml中配置的c3p0,要把c3p0-0.9.1-pre6.jar放到classpath中
1.sqlserver2000

<?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-2.0.xsd">


<!-- Hibernate SessionFactory -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="dataSource">
            <ref local="dataSource" />
        </property>
        <property name="mappingResources">
            <list>
                <value>com/oy/image/model/LoginUser.hbm.xml </value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect </prop>
                <prop key="hibernate.show_sql">true </prop>
                <prop key="hibernate.generate_statistics">true </prop>
                <prop key="hibernate.connection.release_mode">auto </prop>
                <prop key="hibernate.autoReconnect">true </prop>
            </props>
        </property>
    </bean>


<bean id="dataSource"
        class="com.mchange.v2.c3p0.ComboPooledDataSource"
        destroy-method="close">
        <property name="driverClass">
            <value>com.microsoft.jdbc.sqlserver.SQLServerDriver </value>
        </property>
        <property name="jdbcUrl">
            <value>jdbc:microsoft:sqlserver://localhost:1433;databaseName=users </value>
        </property>
        <property name="user">
            <value>bruce </value>
        </property>
        <property name="password">
            <value>bruce </value>
        </property>

<!--连接池中保留的最小连接数。-->
        <property name="minPoolSize">
            <value>5 </value>
        </property>

<!--连接池中保留的最大连接数。Default: 15 -->
        <property name="maxPoolSize">
            <value>30 </value>
        </property>

<!--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 </value>
        </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>

<!--每60秒检查所有连接池中的空闲连接。Default: 0 -->
        <property name="idleConnectionTestPeriod">
            <value>60 </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="imageDao" name="imageDao"
  class="com.oy.image.dao.hibernate.ImageDaoHibernate" abstract="false"
  lazy-init="default" autowire="default" dependency-check="default">
  <property name="sessionFactory">
  <ref bean="sessionFactory" />
  </property>
</bean>
<bean id="imageManager" name="imageManager"
  class="com.oy.image.service.impl.ImageManagerImpl" abstract="false"
  lazy-init="default" autowire="default" dependency-check="default">
  <property name="imageDao">
  <ref bean="imageDao" />
  </property>
</bean>

</beans>