diff --git a/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/DemoServiceImpl.java b/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/DemoServiceImpl.java
index edaf5c7d7..003e76442 100644
--- a/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/DemoServiceImpl.java
+++ b/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/DemoServiceImpl.java
@@ -1,3 +1,20 @@
+/*
+ * 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.dubbo.rest.openapi.advance;
 
 import org.apache.dubbo.config.annotation.DubboService;
diff --git a/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/OpenAPIApplication.java b/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/OpenAPIApplication.java
index 5cbe77863..1dea3caa7 100644
--- a/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/OpenAPIApplication.java
+++ b/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/OpenAPIApplication.java
@@ -1,3 +1,20 @@
+/*
+ * 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.dubbo.rest.openapi.advance;
 
 import org.springframework.boot.SpringApplication;
diff --git a/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/User.java b/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/User.java
index 2852a6e31..e890d4f98 100644
--- a/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/User.java
+++ b/2-advanced/dubbo-samples-triple-rest/dubbo-samples-triple-rest-openapi-advance/src/main/java/org/apache/dubbo/rest/openapi/advance/User.java
@@ -1,3 +1,20 @@
+/*
+ * 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.dubbo.rest.openapi.advance;
 
 public class User {