供应商信息导入：账单周期、到货天数 null判断

src/main/java/com/jsh/erp/service/SupplierService.java

@@ -435,9 +435,9 @@ public class SupplierService {
                 s.setAddress(ExcelUtils.getContent(src, i, 10));
                 s.setSupplierLevel(ExcelUtils.getContent(src, i, 11));
                 s.setSettlementMethod(ExcelUtils.getContent(src, i, 12));
-                s.setBillingCycleDays(Integer.valueOf(ExcelUtils.getContent(src, i, 13)));
+                s.setBillingCycleDays(parseIntegerFromExcel(ExcelUtils.getContent(src, i, 13)));
                 s.setProcurementContact(ExcelUtils.getContent(src, i, 14));
-                s.setDeliverydays(Integer.valueOf(ExcelUtils.getContent(src, i, 15)));
+                s.setDeliverydays(parseIntegerFromExcel(ExcelUtils.getContent(src, i, 15)));
                 s.setDescription(ExcelUtils.getContent(src, i, 16));
                 s.setSort(ExcelUtils.getContent(src, i, 17));
                 s.setCreator(userInfo==null?null:userInfo.getId());
@@ -448,6 +448,18 @@ public class SupplierService {
         importExcel(sList, type, request);
     }
 
+    private Integer parseIntegerFromExcel(String content) {
+        if (content != null && !content.isEmpty()) {
+            try {
+                return Integer.valueOf(content);
+            } catch (NumberFormatException e) {
+                logger.error("无法解析整数值: {}", content, e);
+                return null;
+            }
+        }
+        return null;
+    }
+
     @Transactional(value = "transactionManager", rollbackFor = Exception.class)
     public void importCustomer(MultipartFile file, HttpServletRequest request) throws Exception{
         String type = "客户";