diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
index 497265f5..af6bcb5f 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
@@ -19,7 +19,6 @@ import org.springframework.stereotype.Component;
 
 import javax.annotation.Resource;
 import java.time.LocalDateTime;
-import java.util.Arrays;
 import java.util.List;
 
 /**
diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D3F0SelfCheckMessageExecutor.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D3F0SelfCheckMessageExecutor.java
index 6906911f..22f7c6b8 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D3F0SelfCheckMessageExecutor.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D3F0SelfCheckMessageExecutor.java
@@ -42,7 +42,6 @@ public class D3F0SelfCheckMessageExecutor implements Executor<D3F0SelfCheckMessa
     @Autowired
     ApiController rtcmClient;
 
-
     @Override
     public Void execute(D3F0SelfCheckMessage message) {
         logger.info("receive d3f0 message of {} device: {}", message.getId(), DataTypeUtil.getHexString(message.getSrcData()));
diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/message/D3F2StopIndicationMessage.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/message/D3F2StopIndicationMessage.java
index 5a5336da..5a8b40e5 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/message/D3F2StopIndicationMessage.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/message/D3F2StopIndicationMessage.java
@@ -1,6 +1,5 @@
 package com.imdroid.sideslope.message;
 
-import com.imdroid.common.util.HexUtil;
 import com.imdroid.secapi.dto.GnssTrxMsg;
 import io.netty.buffer.ByteBuf;
 import lombok.Data;