diff --git a/dj_db_conn_pool/backends/jdbc/__init__.py b/dj_db_conn_pool/backends/jdbc/__init__.py
index 68ffccc..8b13789 100644
--- a/dj_db_conn_pool/backends/jdbc/__init__.py
+++ b/dj_db_conn_pool/backends/jdbc/__init__.py
@@ -1,72 +1 @@
-import logging
-import threading
 
-import jpype
-import jpype.dbapi2
-
-from dj_db_conn_pool.backends.jdbc.utils import CursorWrapper
-from dj_db_conn_pool.core.mixins import PersistentDatabaseWrapperMixin
-
-logger = logging.getLogger(__name__)
-
-jdbc_type_converters = {}
-
-lock_check_jvm_status = threading.Lock()
-
-
-class JDBCDatabaseWrapperMixin(PersistentDatabaseWrapperMixin):
-    Database = jpype.dbapi2
-
-    @property
-    def jdbc_driver(self):
-        raise NotImplementedError()
-
-    @property
-    def jdbc_url_prefix(self):
-        raise NotImplementedError()
-
-    @property
-    def jdbc_url(self):
-        return '{prefix}//{HOST}:{PORT}/{NAME}'.format(
-            prefix=self.jdbc_url_prefix,
-            **self.settings_dict
-        )
-
-    def create_cursor(self, name=None):
-        cursor = self.connection.cursor()
-        return CursorWrapper(cursor)
-
-    def get_connection_params(self):
-        return self.settings_dict.get('OPTIONS', {})
-
-    def _get_new_connection(self, conn_params):
-        with lock_check_jvm_status:
-            if not jpype.isJVMStarted():
-                jpype.startJVM(ignoreUnrecognized=True)
-
-        conn = jpype.dbapi2.connect(
-            self.jdbc_url,
-            driver=self.jdbc_driver,
-            driver_args=dict(
-                user=self.settings_dict['USER'],
-                password=self.settings_dict['PASSWORD'],
-                **conn_params
-            ),
-            converters=jdbc_type_converters,
-        )
-
-        return conn
-
-    def _close(self):
-        if self.connection is not None and self.connection.driver_connection.autocommit:
-            # if jdbc connection's autoCommit is on
-            # jpype will throw NotSupportedError after rollback called
-            # we make a little dynamic patch here, make sure
-            # SQLAlchemy will not do rollback before recycling connection
-            self.connection._pool._reset_on_return = None
-
-            logger.debug(
-                "autoCommit of current JDBC connection to %s %s is on, won't do rollback before returning",
-                self.alias, self.connection.driver_connection)
-
-        return super()._close()
diff --git a/dj_db_conn_pool/backends/jdbc/mixins.py b/dj_db_conn_pool/backends/jdbc/mixins.py
index 316534c..b58eb4c 100644
--- a/dj_db_conn_pool/backends/jdbc/mixins.py
+++ b/dj_db_conn_pool/backends/jdbc/mixins.py
@@ -1,5 +1,18 @@
+import logging
+import threading
+
+import jpype
 import jpype.dbapi2
 
+from dj_db_conn_pool.backends.jdbc.utils import CursorWrapper
+from dj_db_conn_pool.core.mixins import PersistentDatabaseWrapperMixin
+
+logger = logging.getLogger(__name__)
+
+jdbc_type_converters = {}
+
+lock_check_jvm_status = threading.Lock()
+
 
 class JdbcDialectMixin:
     def do_ping(self, dbapi_connection):
@@ -7,3 +20,61 @@ def do_ping(self, dbapi_connection):
             return super().do_ping(dbapi_connection)
         except jpype.dbapi2.DatabaseError:
             return False
+
+
+class JDBCDatabaseWrapperMixin(PersistentDatabaseWrapperMixin):
+    Database = jpype.dbapi2
+
+    @property
+    def jdbc_driver(self):
+        raise NotImplementedError()
+
+    @property
+    def jdbc_url_prefix(self):
+        raise NotImplementedError()
+
+    @property
+    def jdbc_url(self):
+        return '{prefix}//{HOST}:{PORT}/{NAME}'.format(
+            prefix=self.jdbc_url_prefix,
+            **self.settings_dict
+        )
+
+    def create_cursor(self, name=None):
+        cursor = self.connection.cursor()
+        return CursorWrapper(cursor)
+
+    def get_connection_params(self):
+        return self.settings_dict.get('OPTIONS', {})
+
+    def _get_new_connection(self, conn_params):
+        with lock_check_jvm_status:
+            if not jpype.isJVMStarted():
+                jpype.startJVM(ignoreUnrecognized=True)
+
+        conn = jpype.dbapi2.connect(
+            self.jdbc_url,
+            driver=self.jdbc_driver,
+            driver_args=dict(
+                user=self.settings_dict['USER'],
+                password=self.settings_dict['PASSWORD'],
+                **conn_params
+            ),
+            converters=jdbc_type_converters,
+        )
+
+        return conn
+
+    def _close(self):
+        if self.connection is not None and self.connection.driver_connection.autocommit:
+            # if jdbc connection's autoCommit is on
+            # jpype will throw NotSupportedError after rollback called
+            # we make a little dynamic patch here, make sure
+            # SQLAlchemy will not do rollback before recycling connection
+            self.connection._pool._reset_on_return = None
+
+            logger.debug(
+                "autoCommit of current JDBC connection to %s %s is on, won't do rollback before returning",
+                self.alias, self.connection.driver_connection)
+
+        return super()._close()
diff --git a/dj_db_conn_pool/backends/jdbc/oceanbase/mixins.py b/dj_db_conn_pool/backends/jdbc/oceanbase/mixins.py
index feacd3f..33cd594 100644
--- a/dj_db_conn_pool/backends/jdbc/oceanbase/mixins.py
+++ b/dj_db_conn_pool/backends/jdbc/oceanbase/mixins.py
@@ -1,4 +1,4 @@
-from dj_db_conn_pool.backends.jdbc import JDBCDatabaseWrapperMixin
+from dj_db_conn_pool.backends.jdbc.mixins import JDBCDatabaseWrapperMixin
 
 
 class JDBCOceanBaseDatabaseWrapperMixin(JDBCDatabaseWrapperMixin):
diff --git a/dj_db_conn_pool/backends/jdbc/oracle/base.py b/dj_db_conn_pool/backends/jdbc/oracle/base.py
index 87d746a..cecec9b 100644
--- a/dj_db_conn_pool/backends/jdbc/oracle/base.py
+++ b/dj_db_conn_pool/backends/jdbc/oracle/base.py
@@ -7,8 +7,7 @@
 from django.db.backends.oracle import base
 from sqlalchemy.dialects.oracle.base import OracleDialect
 
-from dj_db_conn_pool.backends.jdbc import JDBCDatabaseWrapperMixin
-from dj_db_conn_pool.backends.jdbc.mixins import JdbcDialectMixin
+from dj_db_conn_pool.backends.jdbc.mixins import JdbcDialectMixin, JDBCDatabaseWrapperMixin
 
 logger = logging.getLogger(__name__)