feat: add MyBatis CRUD and database integration

src/main/resources/mapper/UserAccountMapper.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+    "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.hongzhen.hera.data.UserAccountMapper">
+
+  <sql id="BaseColumnList">
+    id, username, nickname, password_hash, mobile, email, nfc_uid, wechat_openid, wechat_unionid,
+    status, register_country_code, register_region_code, register_city, register_timezone,
+    created_at, updated_at
+  </sql>
+
+  <select id="findById" resultType="com.hongzhen.hera.data.UserAccount">
+    SELECT <include refid="BaseColumnList"/> FROM user_account WHERE id = #{id}
+  </select>
+
+  <select id="findAll" resultType="com.hongzhen.hera.data.UserAccount">
+    SELECT <include refid="BaseColumnList"/>
+    FROM user_account
+    ORDER BY id DESC
+    LIMIT #{offset}, #{limit}
+  </select>
+
+  <insert id="insert" useGeneratedKeys="true" keyProperty="id">
+    INSERT INTO user_account (
+      username, nickname, password_hash, mobile, email, nfc_uid, wechat_openid, wechat_unionid,
+      status, register_country_code, register_region_code, register_city, register_timezone
+    ) VALUES (
+      #{username}, #{nickname}, #{passwordHash}, #{mobile}, #{email}, #{nfcUid}, #{wechatOpenid},
+      #{wechatUnionid}, COALESCE(#{status}, 1), #{registerCountryCode}, #{registerRegionCode},
+      #{registerCity}, #{registerTimezone}
+    )
+  </insert>
+
+  <update id="update">
+    UPDATE user_account
+    SET username = #{username},
+        nickname = #{nickname},
+        password_hash = COALESCE(#{passwordHash}, password_hash),
+        mobile = #{mobile},
+        email = #{email},
+        nfc_uid = #{nfcUid},
+        wechat_openid = #{wechatOpenid},
+        wechat_unionid = #{wechatUnionid},
+        status = COALESCE(#{status}, status),
+        register_country_code = #{registerCountryCode},
+        register_region_code = #{registerRegionCode},
+        register_city = #{registerCity},
+        register_timezone = #{registerTimezone}
+    WHERE id = #{id}
+  </update>
+
+  <delete id="deleteById">DELETE FROM user_account WHERE id = #{id}</delete>
+</mapper>