c3p0配置文件

<property name="maxWait" value="1000" />  
<property name="initialSize" value="5" />  
<property name="maxActive" value="20" />  
<property name="maxIdle" value="5" />  
<property name="testWhileIdle" value="true" />  
<property name="timeBetweenEvictionRunsMillis" value="15000" />  
<property name="numTestsPerEvictionRun" value="20" />  
<property name="removeAbandoned" value="true" />  
<property name="removeAbandonedTimeout" value="180" />