diff --git a/samples/bmi/pom.xml b/samples/bmi/pom.xml
index 6684fa6558..af0a5189a5 100644
--- a/samples/bmi/pom.xml
+++ b/samples/bmi/pom.xml
@@ -64,5 +64,26 @@
       <artifactId>hibernate-validator</artifactId>
     </dependency>
   </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.rat</groupId>
+        <artifactId>apache-rat-plugin</artifactId>
+        <configuration>
+          <excludes>
+            <exclude>.travis.yml</exclude>
+            <exclude>**/*.md</exclude>
+            <exclude>**/target/*</exclude>
+            <!-- Skip the ssl configuration files -->
+            <exculde>**/resources/ssl/**</exculde>
+            <!-- Skip the protobuf files -->
+            <exclude>**/*.proto</exclude>
+            <!-- Skip the idl files -->
+            <exclude>**/*.idl</exclude>
+          </excludes>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
 
 </project>
diff --git a/samples/jaxrs-sample/jaxrs-consumer/src/main/resources/microservices/hello/hello.yaml b/samples/jaxrs-sample/jaxrs-consumer/src/main/resources/microservices/hello/hello.yaml
index 5162661aca..b13a9df3ad 100644
--- a/samples/jaxrs-sample/jaxrs-consumer/src/main/resources/microservices/hello/hello.yaml
+++ b/samples/jaxrs-sample/jaxrs-consumer/src/main/resources/microservices/hello/hello.yaml
@@ -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.
+## ---------------------------------------------------------------------------
+
 swagger: '2.0'
 info:
   title: hello
@@ -25,4 +42,4 @@ paths:
         default:
           description: 默认返回
           schema:
-            type: string
\ No newline at end of file
+            type: string
diff --git a/samples/jaxrs-sample/jaxrs-provider/src/main/resources/microservices/hello/hello.yaml b/samples/jaxrs-sample/jaxrs-provider/src/main/resources/microservices/hello/hello.yaml
index 5162661aca..b13a9df3ad 100644
--- a/samples/jaxrs-sample/jaxrs-provider/src/main/resources/microservices/hello/hello.yaml
+++ b/samples/jaxrs-sample/jaxrs-provider/src/main/resources/microservices/hello/hello.yaml
@@ -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.
+## ---------------------------------------------------------------------------
+
 swagger: '2.0'
 info:
   title: hello
@@ -25,4 +42,4 @@ paths:
         default:
           description: 默认返回
           schema:
-            type: string
\ No newline at end of file
+            type: string
diff --git a/samples/pojo-sample/pojo-consumer/src/main/resources/microservices/hello/hello.yaml b/samples/pojo-sample/pojo-consumer/src/main/resources/microservices/hello/hello.yaml
index 932e1ed385..d192307b13 100644
--- a/samples/pojo-sample/pojo-consumer/src/main/resources/microservices/hello/hello.yaml
+++ b/samples/pojo-sample/pojo-consumer/src/main/resources/microservices/hello/hello.yaml
@@ -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.
+## ---------------------------------------------------------------------------
+
 swagger: '2.0'
 info:
   title: hello
@@ -52,4 +69,4 @@ definitions:
         type: "string"
         description: "person name"
     xml:
-      name: "Person"
\ No newline at end of file
+      name: "Person"
diff --git a/samples/pojo-sample/pojo-provider/src/main/resources/microservices/hello/hello.yaml b/samples/pojo-sample/pojo-provider/src/main/resources/microservices/hello/hello.yaml
index 932e1ed385..d192307b13 100644
--- a/samples/pojo-sample/pojo-provider/src/main/resources/microservices/hello/hello.yaml
+++ b/samples/pojo-sample/pojo-provider/src/main/resources/microservices/hello/hello.yaml
@@ -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.
+## ---------------------------------------------------------------------------
+
 swagger: '2.0'
 info:
   title: hello
@@ -52,4 +69,4 @@ definitions:
         type: "string"
         description: "person name"
     xml:
-      name: "Person"
\ No newline at end of file
+      name: "Person"
diff --git a/samples/pom.xml b/samples/pom.xml
index d92ed8268d..d4bd96c8f2 100644
--- a/samples/pom.xml
+++ b/samples/pom.xml
@@ -74,6 +74,23 @@
                     <skip>true</skip>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.rat</groupId>
+                <artifactId>apache-rat-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>.travis.yml</exclude>
+                        <exclude>**/*.md</exclude>
+                        <exclude>**/target/*</exclude>
+                        <!-- Skip the ssl configuration files -->
+                        <exculde>**/resources/ssl/**</exculde>
+                        <!-- Skip the protobuf files -->
+                        <exclude>**/*.proto</exclude>
+                        <!-- Skip the idl files -->
+                        <exclude>**/*.idl</exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 </project>
diff --git a/samples/springmvc-sample/springmvc-consumer/src/main/resources/microservices/hello/hello.yaml b/samples/springmvc-sample/springmvc-consumer/src/main/resources/microservices/hello/hello.yaml
index be8ea88dda..240f02ec16 100644
--- a/samples/springmvc-sample/springmvc-consumer/src/main/resources/microservices/hello/hello.yaml
+++ b/samples/springmvc-sample/springmvc-consumer/src/main/resources/microservices/hello/hello.yaml
@@ -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.
+## ---------------------------------------------------------------------------
+
 swagger: '2.0'
 info:
   title: hello
@@ -52,4 +69,4 @@ definitions:
         type: "string"
         description: "person name"
     xml:
-      name: "Person"
\ No newline at end of file
+      name: "Person"
diff --git a/samples/springmvc-sample/springmvc-provider/src/main/resources/microservices/hello/hello.yaml b/samples/springmvc-sample/springmvc-provider/src/main/resources/microservices/hello/hello.yaml
index be8ea88dda..240f02ec16 100644
--- a/samples/springmvc-sample/springmvc-provider/src/main/resources/microservices/hello/hello.yaml
+++ b/samples/springmvc-sample/springmvc-provider/src/main/resources/microservices/hello/hello.yaml
@@ -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.
+## ---------------------------------------------------------------------------
+
 swagger: '2.0'
 info:
   title: hello
@@ -52,4 +69,4 @@ definitions:
         type: "string"
         description: "person name"
     xml:
-      name: "Person"
\ No newline at end of file
+      name: "Person"