java.lang.NoClassDefFoundError: org/apache/commons/pool/KeyedObjectPoolFactory

spring 整合 mybatis

报错信息

java.lang.NoClassDefFoundError: org/apache/commons/pool/KeyedObjectPoolFactory

找不到commons-pool，

添加commons-pool-1.6依赖

<dependency>
  <groupId>commons-pool</groupId>
  <artifactId>commons-pool</artifactId>
  <version>1.6</version>
</dependency>