diff --git a/src/main/java/com/hisense/monitormanage/controller/Controller.java b/src/main/java/com/hisense/monitormanage/controller/Controller.java
index 189b0c2..47d2e22 100644
--- a/src/main/java/com/hisense/monitormanage/controller/Controller.java
+++ b/src/main/java/com/hisense/monitormanage/controller/Controller.java
@@ -14,14 +14,7 @@ import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
-
-import java.time.Clock;
-import java.time.LocalDateTime;
-import java.time.ZoneOffset;
-import java.time.ZonedDateTime;
-import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.List;
 import java.util.Map;