记一次JDBC Connection [com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl@274fdea6] will not be managed b

在springboot工程中：开启事物管理后执行发现

Creating a new SqlSession
SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@47e872bf] was not registered for synchronization because synchronization is not active
JDBC Connection [com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl@274fdea6] will not be managed by Spring
==>  Preparing: select xxx
==> Parameters: 10(Integer), 0(String)
<==    Columns: xxx
<==        Row: xxx
<==      Total: 1
Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@47e872bf]

究其原因，该service上未加 

@Transactional注解，加上注解后打印如下

Creating a new SqlSession
Registering transaction synchronization for SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2f113b85]
JDBC Connection [com.alibaba.druid.proxy.jdbc.ConnectionProxyImpl@633ddc0c] will be managed by Spring
==>  Preparing: select xxxxx
==> Parameters: 10(Integer), 0(String)
<==    Columns: xxx
<==        Row: xxx
<==      Total: 1
Releasing transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2f113b85]
Transaction synchronization committing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2f113b85]
Transaction synchronization deregistering SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2f113b85]
Transaction synchronization closing SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@2f113b85]