From f5f6ce54726ad90f1150408178c56387d6435481 Mon Sep 17 00:00:00 2001
From: zxc <1272811460@qq.com>
Date: Fri, 9 Jul 2021 15:08:00 +0800
Subject: [PATCH] =?UTF-8?q?=E8=8E=B7=E5=8F=96=E6=8C=87=E5=AE=9A=20?=
 =?UTF-8?q?=E6=9C=88=E4=BB=BD=E7=9A=84=E5=89=8Dn=E6=9C=88=20=E8=BF=94?=
 =?UTF-8?q?=E5=9B=9EyyyyMM?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 .../com/epmet/commons/tools/utils/DateUtils.java | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/utils/DateUtils.java b/epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/utils/DateUtils.java
index b47d56574c..c2988b67f9 100644
--- a/epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/utils/DateUtils.java
+++ b/epmet-commons/epmet-commons-tools/src/main/java/com/epmet/commons/tools/utils/DateUtils.java
@@ -446,6 +446,22 @@ public class DateUtils {
         return DateUtils.format(date,DateUtils.DATE_PATTERN_YYYYMM);
     }
 
+    /**
+     * @Description  获取指定 月份的前n月 返回yyyyMM
+     * @Param beforeMonth
+     * @Param monthId
+     * @author zxc
+     * @date 2021/7/9 2:44 下午
+     */
+    public static  String getBeforeNMonthByMonth(int beforeMonth, String monthId){
+        StringBuilder builder = new StringBuilder(monthId);
+        builder.insert(NumConstant.FOUR,"-");
+        builder.insert(builder.length(),"-01");
+        LocalDate parse = LocalDate.parse(builder.toString());
+        LocalDate localDate = parse.minusMonths(beforeMonth);
+        return localDate.toString().replace("-","").substring(NumConstant.ZERO,NumConstant.SIX);
+    }
+
     /**
      * @return java.util.List<java.lang.String> 返回yyyyMMdd
      * @param startTime yyyyMMdd