feat(wms): 添加第二个表格统计功能

- 在 IWmsRawMaterialService 中新增 queryStatistics 方法用于统计原材料数据
- 在 WmsRawMaterialController 中添加 /statistics 接口端点
- 在 WmsRawMaterialMapper 中新增 selectStatistics 查询方法
- 在 XML 映射文件中实现统计查询的 SQL 语句
- 在服务实现类中完成统计逻辑，按厂家、材质、规格分组计算钢卷件数和重量
- 新增 ManufacturerStatisticsVo、MaterialStatisticsVo、SpecificationStatisticsVo 和 WmsRawMaterialStatisticsVo 数据传输对象
- 实现多层级数据聚合统计功能，包括厂家、材质、规格维度的数据汇总

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

@@ -7,22 +7,20 @@ import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.klp.common.utils.StringUtils;
-import com.klp.domain.WmsProduct;
 import lombok.RequiredArgsConstructor;
 import org.springframework.cache.annotation.CacheEvict;
-import org.springframework.cache.annotation.Cacheable;
 import org.springframework.stereotype.Service;
 import com.klp.domain.bo.WmsRawMaterialBo;
 import com.klp.domain.vo.WmsRawMaterialVo;
+import com.klp.domain.vo.dashboard.WmsRawMaterialStatisticsVo;
+import com.klp.domain.vo.dashboard.ManufacturerStatisticsVo;
+import com.klp.domain.vo.dashboard.MaterialStatisticsVo;
+import com.klp.domain.vo.dashboard.SpecificationStatisticsVo;
 import com.klp.domain.WmsRawMaterial;
 import com.klp.mapper.WmsRawMaterialMapper;
 import com.klp.service.IWmsRawMaterialService;
-import com.klp.service.IWmsStockService;
 import com.klp.service.IWmsOrderDetailService;
 import com.klp.service.IWmsOrderService;
-import com.klp.domain.bo.WmsOrderDetailBo;
-import com.klp.domain.vo.WmsOrderDetailVo;
-import com.klp.domain.vo.WmsOrderVo;
 import com.klp.service.IWmsBomService;
 import com.klp.service.IWmsBomItemService;
 import com.klp.domain.bo.WmsBomBo;
@@ -35,6 +33,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.Collection;
 import java.util.Arrays;
+import java.util.stream.Collectors;
+import java.util.ArrayList;
 
 /**
  * 原材料Service业务层处理
@@ -365,4 +365,65 @@ public class WmsRawMaterialServiceImpl implements IWmsRawMaterialService {
         }
         return baseMapper.deleteBatchIds(ids) > 0;
     }
+
+    /**
+     * 统计原材料按厂家、材质、规格的钢卷件数和重量
+     */
+    @Override
+    public List<ManufacturerStatisticsVo> queryStatistics() {
+        List<WmsRawMaterialStatisticsVo> flatList = baseMapper.selectStatistics();
+
+        Map<String, List<WmsRawMaterialStatisticsVo>> byManufacturer = flatList.stream()
+                .collect(Collectors.groupingBy(s -> s.getManufacturer() == null ? "空置" : s.getManufacturer()));
+
+        List<ManufacturerStatisticsVo> result = new ArrayList<>();
+
+        for (Map.Entry<String, List<WmsRawMaterialStatisticsVo>> manuEntry : byManufacturer.entrySet()) {
+            ManufacturerStatisticsVo manuVo = new ManufacturerStatisticsVo();
+            manuVo.setManufacturer(manuEntry.getKey());
+
+            List<WmsRawMaterialStatisticsVo> manuList = manuEntry.getValue();
+            Map<String, List<WmsRawMaterialStatisticsVo>> byMaterial = manuList.stream()
+                    .collect(Collectors.groupingBy(s -> s.getMaterial() == null ? "空置" : s.getMaterial()));
+
+            List<MaterialStatisticsVo> materialVoList = new ArrayList<>();
+            int totalCoilCount = 0;
+            BigDecimal totalWeight = BigDecimal.ZERO;
+
+            for (Map.Entry<String, List<WmsRawMaterialStatisticsVo>> matEntry : byMaterial.entrySet()) {
+                MaterialStatisticsVo matVo = new MaterialStatisticsVo();
+                matVo.setMaterial(matEntry.getKey());
+
+                List<SpecificationStatisticsVo> specVoList = new ArrayList<>();
+                int matCoilCount = 0;
+                BigDecimal matWeight = BigDecimal.ZERO;
+
+                for (WmsRawMaterialStatisticsVo item : matEntry.getValue()) {
+                    SpecificationStatisticsVo specVo = new SpecificationStatisticsVo();
+                    specVo.setSpecification(item.getSpecification() == null ? "空置" : item.getSpecification());
+                    specVo.setCoilCount(item.getCoilCount() == null ? 0 : item.getCoilCount());
+                    specVo.setTotalWeight(item.getTotalWeight() == null ? BigDecimal.ZERO : item.getTotalWeight());
+                    specVoList.add(specVo);
+
+                    matCoilCount += item.getCoilCount() == null ? 0 : item.getCoilCount();
+                    matWeight = matWeight.add(item.getTotalWeight() == null ? BigDecimal.ZERO : item.getTotalWeight());
+                }
+
+                matVo.setSpecifications(specVoList);
+                matVo.setTotalCoilCount(matCoilCount);
+                matVo.setTotalWeight(matWeight);
+                materialVoList.add(matVo);
+
+                totalCoilCount += matCoilCount;
+                totalWeight = totalWeight.add(matWeight);
+            }
+
+            manuVo.setMaterials(materialVoList);
+            manuVo.setTotalCoilCount(totalCoilCount);
+            manuVo.setTotalWeight(totalWeight);
+            result.add(manuVo);
+        }
+
+        return result;
+    }
 }