`java.lang.AbstractMethodError: Method com/mchange/v2/c3p0/impl/NewProxyPreparedStatement.isClosed()Z is abstract
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.isClosed(NewProxyPreparedStatement.java)
at org.apache.ibatis.executor.BaseExecutor.closeStatement(BaseExecutor.java:285)
at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:65)
`
原因
使用的c3p0的相关jar包版本过低。
解决
将c3p0-0.9.1.2.jar 换成 c3p0-0.9.5.2.jar或更高版本。