refactor: 目录结构调整和代码优化

src/main/java/com/youlai/boot/system/mapper/DictItemMapper.java

@@ -0,0 +1,20 @@
+package com.youlai.boot.system.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.youlai.boot.system.model.entity.DictItem;
+import org.apache.ibatis.annotations.Mapper;
+
+/**
+ * 字典项 访问层
+ *
+ * @author Ray Hao
+ * @since 2.9.0
+ */
+@Mapper
+public interface DictItemMapper extends BaseMapper<DictItem> {
+
+}
+
+
+
+