src/main/java/com/ruoyi/sales/service/impl/SalesLedgerServiceImpl.java
@@ -823,7 +823,8 @@ LambdaQueryWrapper<SalesLedger> queryWrapper = new LambdaQueryWrapper<>(); queryWrapper.between(SalesLedger::getEntryDate, begin, end); long count = salesLedgerMapper.selectCount(queryWrapper); return StrUtil.format("{}{:04d}", yyMM, count + 1); Long seq = Optional.of(count).orElse(0L) + 1; return String.format("%s%04d", yyMM, seq); }