diff --git a/renren-admin/src/main/java/io/renren/common/controller/FileUploadController.java b/renren-admin/src/main/java/io/renren/common/controller/FileUploadController.java
index 902ff819..da5266e6 100644
--- a/renren-admin/src/main/java/io/renren/common/controller/FileUploadController.java
+++ b/renren-admin/src/main/java/io/renren/common/controller/FileUploadController.java
@@ -28,7 +28,7 @@ public class FileUploadController {
 
     private static Logger logger = LoggerFactory.getLogger(FileUploadController.class);
 
-    SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd/");
+    private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd/");
 
     @PostMapping("/upload")
     public Result<String> upload(@RequestParam("file") MultipartFile uploadFile,
diff --git a/renren-admin/src/main/java/io/renren/modules/processForm/controller/TAbilityApplicationController.java b/renren-admin/src/main/java/io/renren/modules/processForm/controller/TAbilityApplicationController.java
index 86301db6..82a641b9 100644
--- a/renren-admin/src/main/java/io/renren/modules/processForm/controller/TAbilityApplicationController.java
+++ b/renren-admin/src/main/java/io/renren/modules/processForm/controller/TAbilityApplicationController.java
@@ -17,7 +17,6 @@ import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiImplicitParam;
 import io.swagger.annotations.ApiImplicitParams;
 import io.swagger.annotations.ApiOperation;
-import org.apache.shiro.authz.annotation.RequiresPermissions;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 import springfox.documentation.annotations.ApiIgnore;