style: 格式调整

server/src/main/java/com/pica/cloud/online/exam/analysis/server/utils/DateUtils.java

@@ -14,9 +14,8 @@ public class DateUtils {
     private static final long ONE_DAY = 86400;
     private static final long THREE_DAY = 259200;
 
-    private static Calendar calendar = Calendar.getInstance();
-
     public static String fromNow(Date date) {
+        Calendar calendar = Calendar.getInstance();
         calendar.setTime(date);
 
         long time = date.getTime() / 1000;