Receiver class com.mchange.v2.c3p0.impl.NewProxyResultSet does not define or inherit an implementation of the resolved method 'abstract boolean isClosed()' of interface java.sql.ResultSet.

 背景：

Mayabtis+springboot项目，连接数据库发生异常

报错内容：

java.lang.AbstractMethodError: Receiver class com.mchange.v2.c3p0.impl.NewProxyResultSet does not define or inherit an implementation of the resolved method 'abstract boolean isClosed()' of interface java.sql.ResultSet.

原因：

pom中，c3p0版本太低，原版本

<dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1.2</version>
</dependency>

处理方法：

升级版本

<!--线程池-->
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.2</version>
</dependency>