diff --git a/client/src/main/java/org/apache/iotdb/cli/client/AbstractClient.java b/client/src/main/java/org/apache/iotdb/cli/client/AbstractClient.java
index a5f9af23d383be02fb76554ba5319b54efe5fe0e..9b9903607e4121ab5e0ff21940a7de3bc0e4bb66 100644
--- a/client/src/main/java/org/apache/iotdb/cli/client/AbstractClient.java
+++ b/client/src/main/java/org/apache/iotdb/cli/client/AbstractClient.java
@@ -48,7 +48,7 @@ import org.apache.iotdb.jdbc.IoTDBSQLException;
 import org.apache.iotdb.service.rpc.thrift.ServerProperties;
 import org.apache.thrift.TException;
 
-abstract class AbstractClient {
+public abstract class AbstractClient {
 
   static final String HOST_ARGS = "h";
   static final String HOST_NAME = "host";
@@ -360,7 +360,7 @@ abstract class AbstractClient {
     return options;
   }
 
-  private static String parseLongToDateWithPrecision(DateTimeFormatter formatter,
+  public static String parseLongToDateWithPrecision(DateTimeFormatter formatter,
       long timestamp, ZoneId zoneid, String timestampPrecision) {
     if (timestampPrecision.equals("ms")) {
       long integerofDate = timestamp / 1000;
diff --git a/client/src/main/java/org/apache/iotdb/session/IoTDBRowBatch.java b/client/src/main/java/org/apache/iotdb/session/IoTDBRowBatch.java
index 66ba2862633c39d3ec7edd4c1992d569829962c2..457179c75a8597dd846a58e8df2aeb2c4be5c03d 100644
--- a/client/src/main/java/org/apache/iotdb/session/IoTDBRowBatch.java
+++ b/client/src/main/java/org/apache/iotdb/session/IoTDBRowBatch.java
@@ -1,3 +1,21 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
 package org.apache.iotdb.session;
 
 import java.nio.ByteBuffer;
diff --git a/client/src/main/java/org/apache/iotdb/session/IoTDBSessionException.java b/client/src/main/java/org/apache/iotdb/session/IoTDBSessionException.java
index 0cbdf8b5050468a0def8c0b33e26a79692f769cd..62239b28672f42b2792cd6cef81279d69673dfad 100644
--- a/client/src/main/java/org/apache/iotdb/session/IoTDBSessionException.java
+++ b/client/src/main/java/org/apache/iotdb/session/IoTDBSessionException.java
@@ -1,3 +1,21 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
 package org.apache.iotdb.session;
 
 public class IoTDBSessionException extends RuntimeException {
diff --git a/client/src/main/java/org/apache/iotdb/session/Session.java b/client/src/main/java/org/apache/iotdb/session/Session.java
index 51526d5828619f36a1ecc630a593749f71d105ad..ef14dd135c7f3f8e876fab2bf8fb99439f3c4ad5 100644
--- a/client/src/main/java/org/apache/iotdb/session/Session.java
+++ b/client/src/main/java/org/apache/iotdb/session/Session.java
@@ -1,6 +1,23 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
 package org.apache.iotdb.session;
 
-
 import java.time.ZoneId;
 import java.util.ArrayList;
 import java.util.LinkedList;