TASK:模块化；

src/main/java/com/ai/da/mapper/primary/SysFileExtraMapper.java

@@ -0,0 +1,7 @@
+package com.ai.da.mapper.primary;
+
+import com.ai.da.common.config.mybatis.plus.CommonMapper;
+import com.ai.da.mapper.primary.entity.SysFileExtra;
+
+public interface SysFileExtraMapper extends CommonMapper<SysFileExtra> {
+}

src/main/java/com/ai/da/mapper/primary/entity/SysFileExtra.java

@@ -0,0 +1,29 @@
+package com.ai.da.mapper.primary.entity;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.experimental.Accessors;
+
+import java.io.Serializable;
+
+@Data
+@EqualsAndHashCode(callSuper = false)
+@Accessors(chain = true)
+@TableName("sys_file_extra")
+public class SysFileExtra implements Serializable {
+
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * ID
+     */
+    @TableId(value = "id", type = IdType.AUTO)
+    private Long id;
+
+    private Long sysId;
+
+    private String ageGroup;
+}