时间

src/main/java/com/fdkankan/tk/entity/Room.java

@@ -6,6 +6,7 @@ import com.baomidou.mybatisplus.annotation.TableId;
 import com.baomidou.mybatisplus.annotation.TableLogic;
 import com.baomidou.mybatisplus.annotation.TableName;
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 
@@ -138,6 +139,7 @@ public class Room implements Serializable {
 
     public List<Date> getUseTimeList() {
         if(useStartTime != null && useEndTime != null){
+            useTimeList = new ArrayList<>();
             useTimeList.add(useStartTime);
             useTimeList.add(useEndTime);
         }