From 2b4b7cb0e1b081cd51a7ddea2c0c69ce95ac7dad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A7=A6=E9=B8=BF=E5=B1=95?= <18031053041@163.com>
Date: Mon, 2 Mar 2026 15:18:59 +0800
Subject: [PATCH] =?UTF-8?q?BMS=E8=AE=A1=E8=B4=B9=E5=8D=95=E6=8D=AE?=
 =?UTF-8?q?=E5=AE=A1=E6=A0=B8=E8=AE=A1=E8=B4=B9=E6=B5=81=E6=B0=B4=E5=91=A8?=
 =?UTF-8?q?=E6=9C=9F=E5=BC=80=E5=A7=8B=E6=97=B6=E9=97=B4=E4=BF=AE=E6=94=B9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../service/BillingStatementDomainService.java               | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/mhd_bms/src/main/java/com/mhd/bms/domain/billingStatement/service/BillingStatementDomainService.java b/mhd_bms/src/main/java/com/mhd/bms/domain/billingStatement/service/BillingStatementDomainService.java
index b18d7bc8a..34be902e5 100644
--- a/mhd_bms/src/main/java/com/mhd/bms/domain/billingStatement/service/BillingStatementDomainService.java
+++ b/mhd_bms/src/main/java/com/mhd/bms/domain/billingStatement/service/BillingStatementDomainService.java
@@ -538,8 +538,9 @@ public class BillingStatementDomainService {
             currentMonthPaymentDate = DateUtil.offsetDay(currentMonthPaymentDate, paymentDay - 1);
             // 结束时间：本月出账日的前一天
             Date cycleEndTime = DateUtil.offsetDay(currentMonthPaymentDate, -1);
-            // 开始时间：上个月的出账日
-            Date cycleBeginTime = DateUtil.offsetMonth(currentMonthPaymentDate, -1);
+            // 开始时间：上个月的出账日（明确计算上个月的第一天，然后加上出账日-1天）
+            Date lastMonthFirstDay = DateUtil.beginOfMonth(DateUtil.offsetMonth(businessDate, -1));
+            Date cycleBeginTime = DateUtil.offsetDay(lastMonthFirstDay, paymentDay - 1);
             
             billingStatementDO.setCycleBeginTime(cycleBeginTime);
             billingStatementDO.setCycleEndTime(cycleEndTime);