新增接口，根据订单推荐采购计划

klp-wms/src/main/java/com/klp/service/impl/WmsStockServiceImpl.java

@@ -15,6 +15,7 @@ import com.klp.domain.WmsStock;
 import com.klp.mapper.WmsStockMapper;
 import com.klp.service.IWmsStockService;
 
+import java.math.BigDecimal;
 import java.util.List;
 import java.util.Map;
 import java.util.Collection;
@@ -111,4 +112,9 @@ public class WmsStockServiceImpl implements IWmsStockService {
         }
         return baseMapper.deleteBatchIds(ids) > 0;
     }
+
+    @Override
+    public BigDecimal getStockByItemId(Long rawMaterialId) {
+        return baseMapper.getStockByItemId(rawMaterialId);
+    }
 }