新增接口，根据订单推荐采购计划

klp-wms/src/main/java/com/klp/mapper/WmsStockMapper.java

@@ -4,6 +4,8 @@ import com.klp.domain.WmsStock;
 import com.klp.domain.vo.WmsStockVo;
 import com.klp.common.core.mapper.BaseMapperPlus;
 
+import java.math.BigDecimal;
+
 /**
  * 库存：原材料/产品与库区/库位的存放关系Mapper接口
  *
@@ -12,4 +14,5 @@ import com.klp.common.core.mapper.BaseMapperPlus;
  */
 public interface WmsStockMapper extends BaseMapperPlus<WmsStockMapper, WmsStock, WmsStockVo> {
 
+    BigDecimal getStockByItemId(Long rawMaterialId);
 }