Merge branch 'rabbit' of wangfan/adweb3-server into master

jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/adweb/common/util/DateUtil.java

@@ -1,6 +1,8 @@
 package org.jeecg.modules.adweb.common.util;
 
+import java.time.LocalDate;
 import java.time.ZoneId;
+import java.time.temporal.ChronoUnit;
 import java.util.*;
 
 /**
@@ -91,4 +93,17 @@ public class DateUtil {
         c.add(Calendar.DAY_OF_MONTH, num);
         return c.getTime();
     }
+
+    /**
+     * 计算两个Date的日期差
+     *
+     * @param start
+     * @param end
+     * @return
+     */
+    public static long diffDays(Date start, Date end) {
+        return ChronoUnit.DAYS.between(
+                LocalDate.ofInstant(start.toInstant(), DEFAULT_ZONE_ID),
+                LocalDate.ofInstant(end.toInstant(), DEFAULT_ZONE_ID));
+    }
 }