feat(category): 增加按祖级 ID 查询分类信息功能- 新增 categoryByAncestors 接口，根据祖级 ID 获取分类信息列表

- 在 TzCategory 模型中添加 ancestors 字段，用于存储祖级列表
- 在 TzCategoryService接口中添加 listByAncestors 方法
- 在 TzCategoryServiceImpl 中实现 listByAncestors 方法
- 更新相关 BO 和 VO 类，支持 ancestors 字段

ruoyi-mall-api/src/main/java/org/dromara/web/controller/ApiProdController.java

@@ -215,13 +215,21 @@ public class ApiProdController {
     }
 
     @GetMapping("/categoryInfo")
-    @Operation(summary = "分类信息列表", description = "获取所有的产品分类信息，顶级分类的parentId为0,默认为顶级分类")
+    @Operation(summary = "根据父级ID获取分类信息列表", description = "获取所有的产品分类信息，顶级分类的parentId为0,默认为顶级分类")
     @Parameter(name = "parentId", description = "分类ID")
     public ServerResponseEntity<List<TzCategoryVo>> categoryInfo(@RequestParam(value = "parentId", defaultValue = "0") Long parentId) {
         List<TzCategoryVo> categories = categoryService.listByParentId(parentId);
         return ServerResponseEntity.success(categories);
     }
 
+    @GetMapping("/categoryByAncestors")
+    @Operation(summary = "根据祖级ID获取分类信息列表", description = "获取所有的产品分类信息，顶级分类的ancestors为0,默认为顶级分类")
+    @Parameter(name = "ancestors", description = "祖级ID")
+    public ServerResponseEntity<List<TzCategoryVo>> categoryByAncestors(@RequestParam(value = "ancestors", defaultValue = "0") Long ancestors) {
+        List<TzCategoryVo> categories = categoryService.listByAncestors(ancestors);
+        return ServerResponseEntity.success(categories);
+    }
+
     @PostMapping("/searchProdPage")
     @Operation(summary = "分页排序搜索商品", description = "根据商品名搜索")
     @Parameters({@Parameter(name = "categoryId", description = "分类ID"),@Parameter(name = "prodName", description = "商品名"), @Parameter(name = "floor", description = "是否特价  1：是  2：否", required = true),@Parameter(name = "sort", description = "排序(0综合 1价格排序 2热门 3新品)", required = true), @Parameter(name = "orderBy", description = "排序(0升序 1降序)--sort选择1时必传")})

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/domain/TzCategory.java

@@ -30,9 +30,9 @@ public class TzCategory extends BaseEntity {
     private Long categoryId;
 
     /**
-     * 店铺ID
+     * 祖级列表
      */
-    private Long shopId;
+    private String ancestors;
 
     /**
      * 父节点

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/domain/bo/TzCategoryBo.java

@@ -30,9 +30,9 @@ public class TzCategoryBo extends BaseEntity {
     private Long categoryId;
 
     /**
-     * 店铺ID
+     * 祖级列表
      */
-    private Long shopId;
+    private String ancestors;
 
     /**
      * 父节点

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/domain/vo/TzCategoryVo.java

@@ -33,10 +33,10 @@ public class TzCategoryVo implements Serializable {
     private Long categoryId;
 
     /**
-     * 店铺ID
+     * 祖级列表
      */
-    @ExcelProperty(value = "店铺ID")
-    private Long shopId;
+    @ExcelProperty(value = "祖级列表")
+    private String ancestors;
 
     /**
      * 父节点

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/service/ITzCategoryService.java

@@ -68,4 +68,11 @@ public interface ITzCategoryService {
      * @return
      */
     List<TzCategoryVo> categoryAll();
+
+    /**
+     * 分类信息列表
+     * @param ancestors
+     * @return
+     */
+    List<TzCategoryVo> listByAncestors(Long ancestors);
 }

ruoyi-modules/ruoyi-mall/src/main/java/org/dromara/mall/service/impl/TzCategoryServiceImpl.java

@@ -75,6 +75,10 @@ public class TzCategoryServiceImpl implements ITzCategoryService {
             bo.setGrade(category.getGrade()+1);
             category.setSubset(1);
             baseMapper.updateById(category);
+
+            bo.setAncestors(category.getAncestors()+StringUtils.SEPARATOR+category.getCategoryId());
+        }else{
+            bo.setAncestors("0");
         }
         bo.setRecTime(new Date());
         TzCategory add = MapstructUtils.convert(bo, TzCategory.class);
@@ -94,6 +98,10 @@ public class TzCategoryServiceImpl implements ITzCategoryService {
             bo.setGrade(category.getGrade()+1);
             category.setSubset(1);
             baseMapper.updateById(category);
+
+            bo.setAncestors(category.getAncestors()+StringUtils.SEPARATOR+category.getCategoryId());
+        }else{
+            bo.setAncestors("0");
         }
         TzCategory update = MapstructUtils.convert(bo, TzCategory.class);
         return baseMapper.updateById(update) > 0;
@@ -113,19 +121,24 @@ public class TzCategoryServiceImpl implements ITzCategoryService {
 
     /**
      * 根据父级ID查询子类信息
-     *
      * @param parentId
-     * @return
      */
     @Override
     public List<TzCategoryVo> listByParentId(Long parentId) {
         return baseMapper.selectVoList(new LambdaQueryWrapper<TzCategory>().eq(TzCategory::getParentId, parentId).eq(TzCategory::getStatus,1).eq(TzCategory::getSubset,1));
     }
 
+    /**
+     * 分类信息列表
+     * @param ancestors
+     */
+    @Override
+    public List<TzCategoryVo> listByAncestors(Long ancestors) {
+        return baseMapper.selectVoList(new LambdaQueryWrapper<TzCategory>().like(TzCategory::getAncestors, ancestors).eq(TzCategory::getStatus,1).eq(TzCategory::getSubset,1));
+    }
+
     /**
      * 全部分类信息列表
-     *
-     * @return
      */
     @Override
     public List<TzCategoryVo> categoryAll() {