diff --git a/src/main/java/com/example/building/service/CategoryAttributeService.java b/src/main/java/com/example/building/service/CategoryAttributeService.java
index 1f2942c..e4b6765 100644
--- a/src/main/java/com/example/building/service/CategoryAttributeService.java
+++ b/src/main/java/com/example/building/service/CategoryAttributeService.java
@@ -1,13 +1,12 @@
 package com.example.building.service;
 
 import com.example.building.entity.CategoryAttribute;
-import com.baomidou.mybatisplus.extension.service.IService;
 import java.util.List;
 
 /**
  * 种类属性服务接口
  */
-public interface CategoryAttributeService extends IService<CategoryAttribute> {
+public interface CategoryAttributeService {
 
     /**
      * 获取种类的所有属性
diff --git a/src/main/java/com/example/building/service/ProductAttributeService.java b/src/main/java/com/example/building/service/ProductAttributeService.java
index 43a0dc7..e47d4d6 100644
--- a/src/main/java/com/example/building/service/ProductAttributeService.java
+++ b/src/main/java/com/example/building/service/ProductAttributeService.java
@@ -1,14 +1,13 @@
 package com.example.building.service;
 
 import com.example.building.entity.ProductAttribute;
-import com.baomidou.mybatisplus.extension.service.IService;
 import java.util.List;
 import java.util.Map;
 
 /**
  * 商品属性服务接口
  */
-public interface ProductAttributeService extends IService<ProductAttribute> {
+public interface ProductAttributeService {
 
     /**
      * 获取商品的属性值
diff --git a/src/main/java/com/example/building/service/impl/CategoryAttributeServiceImpl.java b/src/main/java/com/example/building/service/impl/CategoryAttributeServiceImpl.java
index ac50f99..df87eb6 100644
--- a/src/main/java/com/example/building/service/impl/CategoryAttributeServiceImpl.java
+++ b/src/main/java/com/example/building/service/impl/CategoryAttributeServiceImpl.java
@@ -1,10 +1,10 @@
 package com.example.building.service.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.example.building.entity.CategoryAttribute;
 import com.example.building.mapper.CategoryAttributeMapper;
 import com.example.building.service.CategoryAttributeService;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -17,9 +17,12 @@ import java.util.UUID;
 @Service
 public class CategoryAttributeServiceImpl implements CategoryAttributeService {
 
+    @Autowired
+    private CategoryAttributeMapper categoryAttributeMapper;
+
     @Override
     public List<CategoryAttribute> getByCategoryId(String categoryId) {
-        return this.list(new LambdaQueryWrapper<CategoryAttribute>()
+        return categoryAttributeMapper.selectList(new LambdaQueryWrapper<CategoryAttribute>()
                 .eq(CategoryAttribute::getCategoryId, categoryId)
                 .orderByAsc(CategoryAttribute::getSortOrder));
     }
@@ -28,7 +31,7 @@ public class CategoryAttributeServiceImpl implements CategoryAttributeService {
     @Transactional
     public void saveAttributes(String categoryId, List<CategoryAttribute> attrs) {
         // 删除旧属性
-        this.remove(new LambdaQueryWrapper<CategoryAttribute>()
+        categoryAttributeMapper.delete(new LambdaQueryWrapper<CategoryAttribute>()
                 .eq(CategoryAttribute::getCategoryId, categoryId));
         
         // 保存新属性
@@ -38,7 +41,7 @@ public class CategoryAttributeServiceImpl implements CategoryAttributeService {
                 attr.setAttrId(UUID.randomUUID().toString());
                 attr.setCategoryId(categoryId);
                 attr.setSortOrder(i);
-                this.save(attr);
+                categoryAttributeMapper.insert(attr);
             }
         }
     }
@@ -46,7 +49,7 @@ public class CategoryAttributeServiceImpl implements CategoryAttributeService {
     @Override
     @Transactional
     public void deleteByCategoryId(String categoryId) {
-        this.remove(new LambdaQueryWrapper<CategoryAttribute>()
+        categoryAttributeMapper.delete(new LambdaQueryWrapper<CategoryAttribute>()
                 .eq(CategoryAttribute::getCategoryId, categoryId));
     }
 }
\ No newline at end of file
diff --git a/src/main/java/com/example/building/service/impl/ProductAttributeServiceImpl.java b/src/main/java/com/example/building/service/impl/ProductAttributeServiceImpl.java
index 6023e5c..fcb1dae 100644
--- a/src/main/java/com/example/building/service/impl/ProductAttributeServiceImpl.java
+++ b/src/main/java/com/example/building/service/impl/ProductAttributeServiceImpl.java
@@ -1,10 +1,10 @@
 package com.example.building.service.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
-import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import com.example.building.entity.ProductAttribute;
 import com.example.building.mapper.ProductAttributeMapper;
 import com.example.building.service.ProductAttributeService;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -18,9 +18,12 @@ import java.util.UUID;
 @Service
 public class ProductAttributeServiceImpl implements ProductAttributeService {
 
+    @Autowired
+    private ProductAttributeMapper productAttributeMapper;
+
     @Override
     public List<ProductAttribute> getByProductId(String productId) {
-        return this.list(new LambdaQueryWrapper<ProductAttribute>()
+        return productAttributeMapper.selectList(new LambdaQueryWrapper<ProductAttribute>()
                 .eq(ProductAttribute::getProductId, productId));
     }
 
@@ -28,7 +31,7 @@ public class ProductAttributeServiceImpl implements ProductAttributeService {
     @Transactional
     public void saveProductAttributes(String productId, List<Map<String, Object>> attrs) {
         // 删除旧属性
-        this.remove(new LambdaQueryWrapper<ProductAttribute>()
+        productAttributeMapper.delete(new LambdaQueryWrapper<ProductAttribute>()
                 .eq(ProductAttribute::getProductId, productId));
         
         // 保存新属性
@@ -40,7 +43,7 @@ public class ProductAttributeServiceImpl implements ProductAttributeService {
                 pa.setAttrId((String) attr.get("attrId"));
                 pa.setAttrName((String) attr.get("attrName"));
                 pa.setAttrValue(String.valueOf(attr.get("attrValue")));
-                this.save(pa);
+                productAttributeMapper.insert(pa);
             }
         }
     }
@@ -48,7 +51,7 @@ public class ProductAttributeServiceImpl implements ProductAttributeService {
     @Override
     @Transactional
     public void deleteByProductId(String productId) {
-        this.remove(new LambdaQueryWrapper<ProductAttribute>()
+        productAttributeMapper.delete(new LambdaQueryWrapper<ProductAttribute>()
                 .eq(ProductAttribute::getProductId, productId));
     }
 }
\ No newline at end of file