修改作用域范围,与2.x保持一致.

mybatis-plus-extension/src/main/java/com/baomidou/mybatisplus/extension/activerecord/Model.java

@@ -341,7 +341,7 @@ public abstract class Model<T extends Model> implements Serializable {
      * 释放sqlSession
      * @param sqlSession session
      */
-    private void closeSqlSession(SqlSession sqlSession){
+    protected void closeSqlSession(SqlSession sqlSession){
         SqlSessionUtils.closeSqlSession(sqlSession, GlobalConfigUtils.currentSessionFactory(getClass()));
     }
 }

mybatis-plus-extension/src/main/java/com/baomidou/mybatisplus/extension/service/impl/ServiceImpl.java

@@ -90,7 +90,7 @@ public class ServiceImpl<M extends BaseMapper<T>, T> implements IService<T> {
      * 释放sqlSession
      * @param sqlSession session
      */
-    private void closeSqlSession(SqlSession sqlSession){
+    protected void closeSqlSession(SqlSession sqlSession){
         SqlSessionUtils.closeSqlSession(sqlSession, GlobalConfigUtils.currentSessionFactory(currentModelClass()));
     }