traffic-audit-server/src/main/java/com/trafficaudit/dataimport/service/DataImportService.java
@@ -924,6 +924,7 @@
        List<ScaleSplitTransport> list = new ArrayList<>();
        int failRows = 0;
        try (Workbook wb = WorkbookFactory.create(file.getInputStream())) {
            int targetMonth = Integer.parseInt(period.split("-")[1]); // 仅导入目标期所在月的页签(1-N月文件按目标期取当月/累计)
            boolean hasPeriodSheet = false;
            for (int i = 0; i < wb.getNumberOfSheets(); i++) {
                String sn = wb.getSheetAt(i).getSheetName();
@@ -936,8 +937,16 @@
                Sheet sheet = wb.getSheetAt(i);
                String sheetName = sheet.getSheetName();
                String periodType = null;
                if (sheetName.contains("当月") || sheetName.contains("月份")) periodType = "MONTH";
                java.util.regex.Matcher mSheetMonth = java.util.regex.Pattern.compile("(\\d{1,2})\\u6708(\\u4efd|\\u7d2f\\u8ba1)").matcher(sheetName);
                if (mSheetMonth.find()) {
                    int sheetMonth = Integer.parseInt(mSheetMonth.group(1));
                    if (sheetMonth == targetMonth) {
                        periodType = "份".equals(mSheetMonth.group(2)) ? "MONTH" : "CUMULATIVE";
                    }
                } else {
                    if (sheetName.contains("当月")) periodType = "MONTH";
                else if (sheetName.contains("累计")) periodType = "CUMULATIVE";
                }
                if (periodType == null) continue;
                // 校验 sheet 布局:第2行应含「市州/规上企业运输量」,第3行子表头应含「周转量」或「货运量」(扩展布局)