c3p0,dbcp和proxool

 <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
     <property name="driverClassName" value="org.logicalcobwebs.proxool.ProxoolDriver" />
     <property name="url" value="xxxx.xml" />
  </bean> 在xxxx.xml里配置                                                                    
 <proxool>
    <alias>pool</alias>
    <driver-url>jdbc:mysql://192.168.1.4:3306/MIGRATE_TEST?characterEncoding=utf- 8&autoReconnect=true</driver-url>
    <driver-class>com.mysql.jdbc.Driver</driver-class>
    <driver-properties>
        <property name="user" value="website" />
        <property name="password" value="website" />
        <property name="autoReconnect" value="true" />
    </driver-properties>
    <minimum-connection-count>1</minimum-connection-count>
    <maximum-connection-count>8</maximum-connection-count>
    <prototype-count>1</prototype-count>
    <test-before-use>true</test-before-use>
    <house-keeping-sleep-time>60000</house-keeping-sleep-time>
</proxool>

 mysql的URL的后面要加上autoReconnect=true，值得注意的是，当使用ibatis时，日志会报warn:registered a statement as closed which wasn‘t known to be open. 那是因为在ibatis

      package org.springframework.orm.ibatis;
      public class SqlMapClientTemplate extends JdbcAccessor implements SqlMapClientOperations {
         public <T> T execute(SqlMapClientCallback<T> action) throws DataAccessException {
         ..........
         finally {
            // Only close SqlMapSession if we know we‘ve actually opened it
            // at the present level.
            if (ibatisCon == null) {
                session.close();// 由这段引起的，池ibatisCon不为空时，session永远不会关闭
            }
        }
         }
      }