diff --git a/common/src/test/java/org/apache/rocketmq/common/MessageEncodeDecodeTest.java b/common/src/test/java/org/apache/rocketmq/common/MessageEncodeDecodeTest.java
index a219edac48ab420f849a6cc6d7d086161f48ed3b..42d3909d99ec5bd82d42617b864e782a7041e62b 100644
--- a/common/src/test/java/org/apache/rocketmq/common/MessageEncodeDecodeTest.java
+++ b/common/src/test/java/org/apache/rocketmq/common/MessageEncodeDecodeTest.java
@@ -6,39 +6,33 @@
  * (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
+ * 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.
+ * 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.rocketmq.common;
 
-import org.apache.rocketmq.common.message.Message;
-import org.apache.rocketmq.common.message.MessageDecoder;
-import org.junit.Test;
-
 import java.nio.ByteBuffer;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import org.apache.rocketmq.common.message.Message;
+import org.apache.rocketmq.common.message.MessageDecoder;
+import org.junit.Test;
 
 import static org.junit.Assert.assertTrue;
 
-/**
- * Created by liuzhendong on 16/12/21.
- */
 public class MessageEncodeDecodeTest {
 
-
     @Test
-    public void testEncodeDecodeSingle() throws Exception{
+    public void testEncodeDecodeSingle() throws Exception {
         Message message = new Message("topic", "body".getBytes());
         message.setFlag(12);
-        message.putUserProperty("key","value");
+        message.putUserProperty("key", "value");
         byte[] bytes = MessageDecoder.encodeMessage(message);
         ByteBuffer buffer = ByteBuffer.allocate(bytes.length);
         buffer.put(bytes);
@@ -59,7 +53,7 @@ public class MessageEncodeDecodeTest {
             message.putUserProperty("key", "value" + i);
             messages.add(message);
         }
-        byte[]  bytes = MessageDecoder.encodeMessages(messages);
+        byte[] bytes = MessageDecoder.encodeMessages(messages);
 
         ByteBuffer buffer = ByteBuffer.allocate(bytes.length);
         buffer.put(bytes);