Question

Spring里的 c3p0连接数据库

严重: Exception sending context initialized event to listener instance of class com.ruanko.classmate.util.Loader4StartUp
org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.mchange.v2.c3p0.ComboPooledDataSource] for bean with name 'dataSource' defined in class path resource [applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource
Caused by: java.lang.ClassNotFoundException: com.mchange.v2.c3p0.ComboPooledDataSource
我已经添加了c3p0-0.9.0.4.jar但是还是报找不到类的错误 求解

Answer 1

<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:3306/code" />
<property name="user" value="root" />
<property name="password" value="111111" />
<!-- 指定连接数据库连接池的最小连接数 -->
<property name="minPoolSize" value="10" />
<!-- 指定连接数据库连接池的最大连接数 -->
<property name="maxPoolSize" value="30" />
<!-- 指定连接数据库连接池的连接的最大空闲时间 -->
<property name="maxIdleTime" value="1800" />
<property name="acquireIncrement" value="2" />
<property name="maxStatements" value="0" />
<!-- 指定连接数据库连接池的初始化连接数 -->
<property name="initialPoolSize" value="2" />
<property name="idleConnectionTestPeriod" value="1800" />
<property name="acquireRetryAttempts" value="30" />
<property name="breakAfterAcquireFailure" value="true" />
<property name="testConnectionOnCheckout" value="false" />
</bean>

这个是正确的配置，你看下是不是配置文件写错了。
jar的话放在lib之后，清理下项目work目录，重新加载下，应该就可以了