diff --git a/src/main/java/com/xujie/sys/modules/erf/controller/ErfExpApplyController.java b/src/main/java/com/xujie/sys/modules/erf/controller/ErfExpApplyController.java
index 5b2c55ba..ba339b71 100644
--- a/src/main/java/com/xujie/sys/modules/erf/controller/ErfExpApplyController.java
+++ b/src/main/java/com/xujie/sys/modules/erf/controller/ErfExpApplyController.java
@@ -348,7 +348,12 @@ public class ErfExpApplyController extends AbstractController {
     public R confirmSample(@RequestBody Map<String, Object> params) {
         try {
             String applyNo = (String) params.get("applyNo");
-            BigDecimal finalQuantity = BigDecimal.valueOf(Long.parseLong(params.get("finalQuantity").toString()));
+            Object finalQuantityObj = params.get("finalQuantity");
+            if (finalQuantityObj == null || finalQuantityObj.toString().trim().isEmpty()) {
+                return R.error("样品确认失败: 最终数量不能为空");
+            }
+            // 前端数量可能是小数（如 12.3），必须按 BigDecimal 字符串解析避免整数截断/格式异常。
+            BigDecimal finalQuantity = new BigDecimal(finalQuantityObj.toString().trim());
             String finalStatus = (String) params.get("finalStatus");
             String actualFinishDate = (String) params.get("actualFinishDate");
             String umid=(String) params.get("umid");