diff --git a/src/main/java/com/serliunx/ddns/ManagerLite.java b/src/main/java/com/serliunx/ddns/ManagerLite.java
index 7f03955..4775a21 100644
--- a/src/main/java/com/serliunx/ddns/ManagerLite.java
+++ b/src/main/java/com/serliunx/ddns/ManagerLite.java
@@ -9,8 +9,6 @@ import com.serliunx.ddns.core.context.MultipleSourceInstanceContext;
 import com.serliunx.ddns.support.SystemInitializer;
 import com.serliunx.ddns.support.okhttp.HttpClient;
 
-import java.util.Collections;
-
 /**
  * 启动类
  *
diff --git a/src/main/java/com/serliunx/ddns/config/CommandLineConfiguration.java b/src/main/java/com/serliunx/ddns/config/CommandLineConfiguration.java
index b31cd02..9929953 100644
--- a/src/main/java/com/serliunx/ddns/config/CommandLineConfiguration.java
+++ b/src/main/java/com/serliunx/ddns/config/CommandLineConfiguration.java
@@ -3,7 +3,10 @@ package com.serliunx.ddns.config;
 import com.serliunx.ddns.core.Combination;
 import com.serliunx.ddns.support.Assert;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
 
 /**
  * 从启动命令中读取的配置信息
diff --git a/src/test/java/com/serliunx/ddns/test/AttachmentTest.java b/src/test/java/com/serliunx/ddns/test/AttachmentTest.java
index 3dab102..a7cfc4e 100644
--- a/src/test/java/com/serliunx/ddns/test/AttachmentTest.java
+++ b/src/test/java/com/serliunx/ddns/test/AttachmentTest.java
@@ -1,10 +1,7 @@
 package com.serliunx.ddns.test;
 
 import com.serliunx.ddns.constant.SystemConstants;
-import com.serliunx.ddns.core.Attachment;
-import com.serliunx.ddns.core.FileAttachment;
 import com.serliunx.ddns.core.factory.FileInstanceFactory;
-import com.serliunx.ddns.core.factory.JsonFileInstanceFactory;
 import com.serliunx.ddns.core.factory.YamlFileInstanceFactory;
 import org.junit.Test;
 
diff --git a/src/test/java/com/serliunx/ddns/test/FactoryTest.java b/src/test/java/com/serliunx/ddns/test/FactoryTest.java
index 80635c9..7b46ebd 100644
--- a/src/test/java/com/serliunx/ddns/test/FactoryTest.java
+++ b/src/test/java/com/serliunx/ddns/test/FactoryTest.java
@@ -3,7 +3,6 @@ package com.serliunx.ddns.test;
 import com.serliunx.ddns.constant.InstanceType;
 import com.serliunx.ddns.constant.SystemConstants;
 import com.serliunx.ddns.core.factory.DatabaseInstanceFactory;
-import com.serliunx.ddns.core.factory.InstanceFactory;
 import com.serliunx.ddns.core.factory.ListableInstanceFactory;
 import com.serliunx.ddns.core.factory.YamlFileInstanceFactory;
 import com.serliunx.ddns.core.instance.Instance;