diff --git a/src/main/java/im/zhaojun/zfile/config/ContentTypeTextToTextJson.java b/src/main/java/im/zhaojun/zfile/config/ContentTypeTextToTextJson.java
index 66d5076..52d0cef 100644
--- a/src/main/java/im/zhaojun/zfile/config/ContentTypeTextToTextJson.java
+++ b/src/main/java/im/zhaojun/zfile/config/ContentTypeTextToTextJson.java
@@ -7,7 +7,6 @@ import org.springframework.http.client.ClientHttpRequestInterceptor;
 import org.springframework.http.client.ClientHttpResponse;
 
 import java.io.IOException;
-import java.net.URI;
 import java.util.Collections;
 
 /**
diff --git a/src/main/java/im/zhaojun/zfile/core/FileListCacheAop.java b/src/main/java/im/zhaojun/zfile/core/FileListCacheAop.java
index b0705f2..ce0c338 100644
--- a/src/main/java/im/zhaojun/zfile/core/FileListCacheAop.java
+++ b/src/main/java/im/zhaojun/zfile/core/FileListCacheAop.java
@@ -6,7 +6,6 @@ import im.zhaojun.zfile.service.SystemConfigService;
 import org.aspectj.lang.ProceedingJoinPoint;
 import org.aspectj.lang.annotation.Around;
 import org.aspectj.lang.annotation.Aspect;
-import org.aspectj.lang.annotation.Pointcut;
 import org.springframework.stereotype.Component;
 import org.springframework.util.CollectionUtils;
 
diff --git a/src/main/java/im/zhaojun/zfile/service/impl/FtpServiceImpl.java b/src/main/java/im/zhaojun/zfile/service/impl/FtpServiceImpl.java
index b3f40b3..4d3954c 100644
--- a/src/main/java/im/zhaojun/zfile/service/impl/FtpServiceImpl.java
+++ b/src/main/java/im/zhaojun/zfile/service/impl/FtpServiceImpl.java
@@ -12,10 +12,8 @@ import im.zhaojun.zfile.service.base.AbstractBaseFileService;
 import im.zhaojun.zfile.service.base.BaseFileService;
 import im.zhaojun.zfile.util.StringUtils;
 import org.apache.commons.net.ftp.FTP;
-import org.apache.commons.net.ftp.FTPClient;
 import org.apache.commons.net.ftp.FTPClientConfig;
 import org.apache.commons.net.ftp.FTPFile;
-import org.apache.commons.net.ftp.FTPReply;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;