参考：(willpower88兄的blog)
http://www.blogjava.net/willpower88/archive/2007/01/10/92928.html当我spring中用c3p0时第一次老出现
org.hibernate.exception.JDBCConnectionException: could not execute query
刷新后就不会。一番折腾后直接用<property name="" value="" />就可以了。随后找到willpower88兄的blog他总结得很好。
环境：
spring 2.0
c3p0-0.9.0.4
spring配置文件如下(引用willpower88兄的，注释掉的都有问题的）：
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://localhost/test"/>
<property name="user" value="root"/>
<property name="password" value=""/>
<property name="minPoolSize" value="2"/>
<property name="maxPoolSize" value="20"/>
<property name="maxIdleTime" value="1800"/>
<property name="acquireIncrement" value="2"/>
<property name="maxStatements" value="0"/>
<property name="initialPoolSize" value="3"/>
<property name="idleConnectionTestPeriod" value="1800"/>
<property name="acquireRetryAttempts" value="30"/>
<property name="breakAfterAcquireFailure" value="true"/>
<property name="testConnectionOnCheckout" value="false"/>
<!--
<property name="properties">
<props>
<prop key="c3p0.minPoolSize">1</prop>
<prop key="c3p0.maxPoolSize">10</prop>
<prop key="c3p0.maxIdleTime">1800</prop>
<prop key="c3p0.acquireIncrement">2</prop>
<prop key="c3p0.maxStatements">0</prop>
<prop key="c3p0.initialPoolSize">2</prop>
<prop key="c3p0.idleConnectionTestPeriod">1800</prop>
<prop key="c3p0.acquireRetryAttempts">30</prop>
<prop key="c3p0.breakAfterAcquireFailure">true</prop>
<prop key="c3p0.testConnectionOnCheckout">true</prop>
<prop key="user">root</prop>
<prop key="password">999999</prop>
</props>
</property>
-->
</bean>
<!-- Hibernate SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingDirectoryLocations">
<list>
<value>classpath:/com/licaionline/domain/</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</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>
<prop key="hibernate.cglib.use_reflection_optimizer">true</prop>
<!--
<prop key="hibernate.useUnicode"></prop>
<prop key="hibernate.characterEncoding"></prop>
<prop key="hibernate.default-lazy-init"></prop>
<prop key="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</prop>
-->
<!--
<prop key="hibernate.c3p0.acquire_increment">2</prop>
<prop key="hibernate.c3p0.idle_test_period">1800</prop>
<prop key="hibernate.c3p0.timeout">1800</prop>
<prop key="hibernate.c3p0.max_size">30</prop>
<prop key="hibernate.c3p0.min_size">2</prop>
<prop key="hibernate.c3p0.max_statements">50</prop>
-->
</props>
</property>
</bean>
posted on 2007-03-18 17:06
流浪汗 阅读(2564)
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