feat(cost): 新增生产成本明细批量保存功能，支持先删除再插入

在CostProdDetailBo中新增detailIds和prodDetailList字段，分别用于接收待删除ID集合和待插入数据集合。新增批量保存接口batchSaveWithDelete，在Service层实现事务性批量操作：先根据detailIds删除指定记录，再将prodDetailList中的数据批量插入。Controller层新增/batch端点调用该服务，提供完整的前后端批量处理能力。

klp-cost/src/main/java/com/klp/cost/controller/CostProdDetailController.java

@@ -75,6 +75,16 @@ public class CostProdDetailController extends BaseController {
         return R.ok(iCostProdDetailService.insertByBo(bo));
     }
 
+    /**
+     * 批量保存生产成本明细（先删除再插入）
+     */
+    @Log(title = "生产成本明细", businessType = BusinessType.INSERT)
+    @RepeatSubmit()
+    @PostMapping("/batch")
+    public R<Void> batchSave(@RequestBody CostProdDetailBo bo) {
+        return toAjax(iCostProdDetailService.batchSaveWithDelete(bo));
+    }
+
     /**
      * 修改生产成本明细
      */

klp-cost/src/main/java/com/klp/cost/domain/bo/CostProdDetailBo.java

@@ -7,6 +7,7 @@ import javax.validation.constraints.*;
 
 import java.math.BigDecimal;
 import java.util.Date;
+import java.util.List;
 import com.fasterxml.jackson.annotation.JsonFormat;
 import org.springframework.format.annotation.DateTimeFormat;
 
@@ -68,5 +69,15 @@ public class CostProdDetailBo extends BaseEntity {
      */
     private String remark;
 
+    /**
+     * 要删除的主键ID集合
+     */
+    private List<Long> detailIds;
+
+    /**
+     * 要批量插入的数据集合
+     */
+    private List<CostProdDetailBo> prodDetailList;
+
 
 }

klp-cost/src/main/java/com/klp/cost/service/ICostProdDetailService.java

@@ -46,4 +46,9 @@ public interface ICostProdDetailService {
      * 校验并批量删除生产成本明细信息
      */
     Boolean deleteWithValidByIds(Collection<Long> ids, Boolean isValid);
+
+    /**
+     * 批量保存（先删除再插入）
+     */
+    Boolean batchSaveWithDelete(CostProdDetailBo bo);
 }

klp-cost/src/main/java/com/klp/cost/service/impl/CostProdDetailServiceImpl.java

@@ -1,6 +1,7 @@
 package com.klp.cost.service.impl;
 
 import cn.hutool.core.bean.BeanUtil;
+import cn.hutool.core.collection.CollUtil;
 import com.klp.common.core.page.TableDataInfo;
 import com.klp.common.core.domain.PageQuery;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
@@ -9,6 +10,7 @@ import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.klp.common.utils.StringUtils;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import com.klp.cost.domain.bo.CostProdDetailBo;
 import com.klp.cost.domain.vo.CostProdDetailVo;
 import com.klp.cost.domain.CostProdDetail;
@@ -18,6 +20,7 @@ import com.klp.cost.service.ICostProdDetailService;
 import java.util.List;
 import java.util.Map;
 import java.util.Collection;
+import java.util.stream.Collectors;
 
 /**
  * 生产成本明细Service业务层处理
@@ -112,4 +115,22 @@ public class CostProdDetailServiceImpl implements ICostProdDetailService {
         }
         return baseMapper.deleteBatchIds(ids) > 0;
     }
+
+    /**
+     * 批量保存（先删除再插入）
+     */
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public Boolean batchSaveWithDelete(CostProdDetailBo bo) {
+        if (CollUtil.isNotEmpty(bo.getProdDetailList())) {
+            if (CollUtil.isNotEmpty(bo.getDetailIds())) {
+                baseMapper.deleteBatchIds(bo.getDetailIds());
+            }
+            List<CostProdDetail> list = bo.getProdDetailList().stream()
+                    .map(item -> BeanUtil.toBean(item, CostProdDetail.class))
+                    .collect(Collectors.toList());
+            return baseMapper.insertBatch(list);
+        }
+        return false;
+    }
 }