diff --git a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/TsfHeartbeatProperties.java b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/TsfHeartbeatProperties.java
index aeb613ff4..e946c5cec 100644
--- a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/TsfHeartbeatProperties.java
+++ b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/TsfHeartbeatProperties.java
@@ -21,6 +21,7 @@ import javax.validation.constraints.DecimalMax;
 import javax.validation.constraints.DecimalMin;
 import javax.validation.constraints.Min;
 import javax.validation.constraints.NotNull;
+
 import org.apache.commons.logging.Log;
 import org.joda.time.Period;
 
diff --git a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/registry/TsfDiscoveryRegistryAutoConfiguration.java b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/registry/TsfDiscoveryRegistryAutoConfiguration.java
index 548f1eda6..d36c779fe 100644
--- a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/registry/TsfDiscoveryRegistryAutoConfiguration.java
+++ b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/registry/TsfDiscoveryRegistryAutoConfiguration.java
@@ -16,13 +16,14 @@
  */
 
 package com.tencent.cloud.polaris.tsf.registry;
+import javax.servlet.ServletContext;
 
 import com.tencent.cloud.polaris.context.PolarisSDKContextManager;
 import com.tencent.cloud.polaris.context.tsf.ConditionalOnTsfEnabled;
 import com.tencent.cloud.polaris.registry.PolarisServiceRegistryAutoConfiguration;
 import com.tencent.cloud.polaris.tsf.TsfDiscoveryProperties;
 import com.tencent.cloud.polaris.tsf.TsfHeartbeatProperties;
-import javax.servlet.ServletContext;
+
 
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.AutoConfigureBefore;
diff --git a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/registry/TsfServletRegistrationCustomizer.java b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/registry/TsfServletRegistrationCustomizer.java
index 0233efa16..262df4340 100644
--- a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/registry/TsfServletRegistrationCustomizer.java
+++ b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/tsf/registry/TsfServletRegistrationCustomizer.java
@@ -22,11 +22,13 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 
+import javax.servlet.ServletContext;
+
 import com.tencent.cloud.common.util.JacksonUtils;
 import com.tencent.cloud.polaris.registry.PolarisRegistration;
 import com.tencent.cloud.polaris.registry.PolarisRegistrationCustomizer;
 import com.tencent.polaris.plugins.connector.common.constant.ConsulConstant;
-import javax.servlet.ServletContext;
+
 
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.util.StringUtils;
diff --git a/spring-cloud-tencent-examples/tsf-example/provider-demo/src/main/java/com/tencent/cloud/tsf/demo/provider/ProviderController.java b/spring-cloud-tencent-examples/tsf-example/provider-demo/src/main/java/com/tencent/cloud/tsf/demo/provider/ProviderController.java
index 2a5f52b77..fd9c5ce56 100644
--- a/spring-cloud-tencent-examples/tsf-example/provider-demo/src/main/java/com/tencent/cloud/tsf/demo/provider/ProviderController.java
+++ b/spring-cloud-tencent-examples/tsf-example/provider-demo/src/main/java/com/tencent/cloud/tsf/demo/provider/ProviderController.java
@@ -23,8 +23,9 @@ import java.net.NetworkInterface;
 import java.net.SocketException;
 import java.util.Enumeration;
 
-import com.tencent.cloud.tsf.demo.provider.config.ProviderNameConfig;
 import javax.servlet.http.HttpServletResponse;
+
+import com.tencent.cloud.tsf.demo.provider.config.ProviderNameConfig;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;