feat(goods): 添加商品分类校验与层级管理功能- 在 ProductCategory 实体类中增加名称和图标的非空校验注解

-为控制器启用参数校验支持，确保请求数据合法性
- 实现分类保存和更新方法，自动设置分类层级并检查重复性
- 引入断言工具防止重复分类插入或更新
- 增加对父级分类不存在情况的默认值处理逻辑

ruoyi-modules/ruoyi-goods/src/main/java/com/wzj/soopin/goods/controller/ProductCategoryController.java

@@ -14,6 +14,7 @@ import org.dromara.common.core.domain.R;
 import org.dromara.common.log.annotation.Log;
 import org.dromara.common.log.enums.BusinessType;
 import org.dromara.common.web.core.BaseController;
+import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
@@ -29,6 +30,7 @@ import java.util.List;
 @RestController
 @RequestMapping("/pms/product/category")
 @RequiredArgsConstructor
+@Validated
 public class ProductCategoryController extends BaseController {
 
     private final ProductCategoryService service;

ruoyi-modules/ruoyi-goods/src/main/java/com/wzj/soopin/goods/domain/entity/ProductCategory.java

@@ -5,6 +5,7 @@ import com.baomidou.mybatisplus.annotation.TableField;
 import com.baomidou.mybatisplus.annotation.TableLogic;
 import com.baomidou.mybatisplus.annotation.TableName;
 import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotBlank;
 import lombok.Data;
 import org.apache.ibatis.type.JdbcType;
 import org.dromara.common.core.domain.model.BaseAudit;
@@ -30,6 +31,7 @@ public class ProductCategory extends BaseAudit {
 
     @Schema(description = "NAME")
     @Excel(name = "NAME")
+    @NotBlank(message = "名称不能为空")
     private String name;
 
     @Schema(description = "分类级别：0->1级；1->2级")
@@ -46,6 +48,7 @@ public class ProductCategory extends BaseAudit {
 
     @Schema(description = "图标")
     @Excel(name = "图标")
+    @NotBlank(message = "图标不能为空")
     private String icon;
 
     @Schema(description = "删除标志（0代表存在，1代表删除）")

ruoyi-modules/ruoyi-goods/src/main/java/com/wzj/soopin/goods/service/ProductCategoryService.java

@@ -8,5 +8,10 @@ import com.wzj.soopin.goods.domain.vo.ProductCategoryVO;
 import java.util.List;
 
 public interface ProductCategoryService extends IService<ProductCategory> {
+
+    boolean save(ProductCategory productCategory);
+
+    boolean updateById(ProductCategory productCategory);
+
     List<ProductCategoryVO> tree(Wrapper<ProductCategory> wrapper);
 }

ruoyi-modules/ruoyi-goods/src/main/java/com/wzj/soopin/goods/service/impl/ProductCategoryServiceImpl.java

@@ -1,6 +1,8 @@
 package com.wzj.soopin.goods.service.impl;
 
+import cn.hutool.core.lang.Assert;
 import com.baomidou.mybatisplus.core.conditions.Wrapper;
+import com.baomidou.mybatisplus.core.toolkit.Wrappers;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.wzj.soopin.goods.convert.ProductCategoryConvert;
 import com.wzj.soopin.goods.domain.entity.ProductCategory;
@@ -8,6 +10,7 @@ import com.wzj.soopin.goods.domain.vo.ProductCategoryVO;
 import com.wzj.soopin.goods.mapper.ProductCategoryMapper;
 import com.wzj.soopin.goods.service.ProductCategoryService;
 import lombok.RequiredArgsConstructor;
+import org.dromara.common.core.exception.ServiceException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -28,6 +31,32 @@ public class ProductCategoryServiceImpl extends ServiceImpl<ProductCategoryMappe
 
     private final ProductCategoryConvert convert;
 
+    @Override
+    public boolean save(ProductCategory productCategory) {
+        if (productCategory.getParentId() == null || productCategory.getParentId() == 0) {
+            productCategory.setLevel(1);
+            productCategory.setParentId(0L);
+        } else {
+            ProductCategory parent = this.getById(productCategory.getParentId());
+            productCategory.setLevel(parent.getLevel() + 1);
+        }
+        boolean exists = this.exists(Wrappers.lambdaQuery(ProductCategory.class)
+            .eq(ProductCategory::getName, productCategory.getName())
+            .eq(ProductCategory::getParentId, productCategory.getParentId()));
+        Assert.isFalse(exists, () -> ServiceException.of("分类已存在"));
+        return super.save(productCategory);
+    }
+
+    @Override
+    public boolean updateById(ProductCategory productCategory) {
+        boolean exists = this.exists(Wrappers.lambdaQuery(ProductCategory.class)
+            .ne(ProductCategory::getId, productCategory.getId())
+            .eq(ProductCategory::getName, productCategory.getName())
+            .eq(ProductCategory::getParentId, productCategory.getParentId()));
+        Assert.isFalse(exists, () -> ServiceException.of("分类已存在"));
+        return super.updateById(productCategory);
+    }
+
     @Override
     public List<ProductCategoryVO> tree(Wrapper<ProductCategory> wrapper) {
         List<ProductCategory> list = this.list(wrapper);