diff --git a/blogserver/src/main/java/org/sang/mapper/CategoryMapper.java b/blogserver/src/main/java/org/sang/mapper/CategoryMapper.java
new file mode 100644
index 0000000..ca85177
--- /dev/null
+++ b/blogserver/src/main/java/org/sang/mapper/CategoryMapper.java
@@ -0,0 +1,19 @@
+package org.sang.mapper;
+
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+import org.sang.bean.Category;
+
+import java.util.List;
+
+
+@Mapper
+public interface CategoryMapper {
+    List<Category> getAllCategories();
+
+    int deleteCategoryByIds(@Param("ids") String[] ids);
+
+    int updateCategoryById(Category category);
+
+    int addCategory(Category category);
+}