diff --git a/src/main/java/com/zilber/boot/file/dao/FileDao.java b/src/main/java/com/zilber/boot/file/dao/FileDao.java
new file mode 100644
index 0000000..c8d16de
--- /dev/null
+++ b/src/main/java/com/zilber/boot/file/dao/FileDao.java
@@ -0,0 +1,19 @@
+package com.zilber.boot.file.dao;
+
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+import java.util.Map;
+
+@Mapper
+public interface FileDao {
+
+    @Select("SELECT url, type FROM file WHERE md5 = #{md5} LIMIT 1")
+    Map<String, Object> listFileUrl(@Param("md5") String md5);
+
+    @Insert("INSERT INTO file(md5, url, type) VALUES (#{md5}, #{url}, #{type})")
+    void addFile(@Param("md5") String md5,@Param("url") String url,@Param("type") Integer type);
+
+}