diff --git a/openhis-application/src/main/java/com/openhis/application/service/impl/OrderServiceImpl.java b/openhis-application/src/main/java/com/openhis/application/service/impl/OrderServiceImpl.java
index 6088ea534..bd065d798 100644
--- a/openhis-application/src/main/java/com/openhis/application/service/impl/OrderServiceImpl.java
+++ b/openhis-application/src/main/java/com/openhis/application/service/impl/OrderServiceImpl.java
@@ -3,13 +3,13 @@ package com.openhis.application.service.impl;
 import com.openhis.application.domain.entity.OrderDetail;
 import com.openhis.application.domain.entity.OrderMain;
 import com.openhis.application.domain.entity.CatalogItem;
+import com.openhis.application.domain.entity.ScheduleSlot;               // <-- 新增导入
 import com.openhis.application.mapper.OrderDetailMapper;
 import com.openhis.application.mapper.OrderMainMapper;
 import com.openhis.application.mapper.CatalogItemMapper;
-import com.openhis.application.mapper.ScheduleSlotMapper;               // 新增导入
-import com.openhis.application.domain.entity.ScheduleSlot;               // 新增导入
+import com.openhis.application.mapper.ScheduleSlotMapper;               // <-- 新增导入
 import com.openhis.application.exception.BusinessException;
-import com.openhis.application.service.OrderService;                     // 修正错误的包名
+import com.openhs.application.service.OrderService;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.stereotype.Service;
@@ -40,18 +40,79 @@ public class OrderServiceImpl implements OrderService {
     private final OrderMainMapper orderMainMapper;
     private final OrderDetailMapper orderDetailMapper;
     private final CatalogItemMapper catalogItemMapper;
-    private final ScheduleSlotMapper scheduleSlotMapper;                 // 新增成员
+    private final ScheduleSlotMapper scheduleSlotMapper;                 // <-- 新增成员
 
     public OrderServiceImpl(OrderMainMapper orderMainMapper,
                             OrderDetailMapper orderDetailMapper,
                             CatalogItemMapper catalogItemMapper,
-                            ScheduleSlotMapper scheduleSlotMapper) {          // 注入
+                            ScheduleSlotMapper scheduleSlotMapper) {          // <-- 注入
         this.orderMainMapper = orderMainMapper;
         this.orderDetailMapper = orderDetailMapper;
         this.catalogItemMapper = catalogItemMapper;
         this.scheduleSlotMapper = scheduleSlotMapper;
     }
 
-    // 其余业务方法保持不变，确保在保存 OrderDetail 时填充 unit，
-    // 并在支付成功后更新对应的 ScheduleSlot 状态为 3。
+    /**
+     * 保存医嘱（包括主表和明细表）。
+     *
+     * @param orderMain   医嘱主表数据
+     * @param orderDetails 医嘱明细列表
+     */
+    @Transactional(rollbackFor = Exception.class)
+    @Override
+    public void saveOrder(OrderMain orderMain, List<OrderDetail> orderDetails) {
+        // 1. 保存主表
+        orderMainMapper.insert(orderMain);
+        Long orderId = orderMain.getId();
+
+        // 2. 保存明细，关键是把诊疗目录的计量单位写入明细的 unit 字段
+        for (OrderDetail detail : orderDetails) {
+            // 关联主表主键
+            detail.setOrderId(orderId);
+
+            // ---- 修复 Bug #561 开始 ----
+            // 根据明细的 itemCode（若为空则使用 itemId）查询对应的目录项
+            CatalogItem catalogItem = null;
+            if (detail.getItemCode() != null && !detail.getItemCode().trim().isEmpty()) {
+                catalogItem = catalogItemMapper.selectByItemCode(detail.getItemCode());
+            } else if (detail.getItemId() != null) {
+                catalogItem = catalogItemMapper.selectById(detail.getItemId());
+            }
+
+            // 若找到目录项且其 unit 不为空，则填充到明细的 unit 字段
+            if (catalogItem != null && catalogItem.getUnit() != null) {
+                detail.setUnit(catalogItem.getUnit());
+            } else {
+                // 没有找到对应目录或目录未配置单位时，记录日志并使用空字符串防止出现 “null”
+                log.warn("未能为医嘱明细 (orderId={}, itemId={}, itemCode={}) 获取计量单位，"
+                        + "将使用默认空字符串", orderId, detail.getItemId(), detail.getItemCode());
+                detail.setUnit("");
+            }
+            // ---- 修复 Bug #561 结束 ----
+
+            orderDetailMapper.insert(detail);
+        }
+    }
+
+    /**
+     * 订单支付成功后，更新对应的号源状态为已取号（status = 3）。
+     *
+     * @param scheduleSlotId 号源主键
+     */
+    @Transactional(rollbackFor = Exception.class)
+    @Override
+    public void handlePaymentSuccess(Long scheduleSlotId) {
+        if (scheduleSlotId == null) {
+            throw new BusinessException("号源ID不能为空");
+        }
+        ScheduleSlot slot = scheduleSlotMapper.selectById(scheduleSlotId);
+        if (slot == null) {
+            throw new BusinessException("号源不存在");
+        }
+        // 将状态更新为 “已取号”(3)
+        slot.setStatus(3);
+        scheduleSlotMapper.updateById(slot);
+    }
+
+    // 其它业务方法保持不变...
 }