first commit

target/classes/mapper/UserMapper.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.gameplatform.server.mapper.UserMapper">
+
+    <resultMap id="UserResultMap" type="com.gameplatform.server.model.User">
+        <id     property="id"         column="id" />
+        <result property="username"   column="username" />
+        <result property="email"      column="email" />
+        <result property="createdAt"  column="created_at" />
+    </resultMap>
+
+    <sql id="Base_Column_List">
+        id, username, email, created_at
+    </sql>
+
+    <select id="findById" parameterType="long" resultMap="UserResultMap">
+        SELECT <include refid="Base_Column_List"/>
+        FROM users
+        WHERE id = #{id}
+    </select>
+
+    <select id="findAll" resultMap="UserResultMap">
+        SELECT <include refid="Base_Column_List"/>
+        FROM users
+        ORDER BY id DESC
+    </select>
+
+    <insert id="insert" parameterType="com.gameplatform.server.model.User" useGeneratedKeys="true" keyProperty="id">
+        INSERT INTO users (username, email, created_at)
+        VALUES (#{username}, #{email}, NOW())
+    </insert>
+
+    <delete id="deleteById" parameterType="long">
+        DELETE FROM users WHERE id = #{id}
+    </delete>
+
+</mapper>
+

target/classes/mapper/admin/AdminUserMapper.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.gameplatform.server.mapper.admin.AdminUserMapper">
+    <resultMap id="AdminUserMap" type="com.gameplatform.server.model.entity.admin.AdminUser">
+        <id property="id" column="id" />
+        <result property="username" column="username" />
+        <result property="passwordHash" column="password_hash" />
+        <result property="role" column="role" />
+        <result property="status" column="status" />
+        <result property="createdAt" column="created_at" />
+        <result property="updatedAt" column="updated_at" />
+    </resultMap>
+
+    <select id="findByUsername" parameterType="string" resultMap="AdminUserMap">
+        SELECT id, username, password_hash, role, status, created_at, updated_at
+        FROM admin_user
+        WHERE username = #{username}
+        LIMIT 1
+    </select>
+</mapper>
+

target/classes/mapper/agent/AgentMapper.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.gameplatform.server.mapper.agent.AgentMapper">
+    <resultMap id="AgentMap" type="com.gameplatform.server.model.entity.agent.Agent">
+        <id property="id" column="id" />
+        <result property="name" column="name" />
+        <result property="loginAccount" column="login_account" />
+        <result property="passwordHash" column="password_hash" />
+        <result property="status" column="status" />
+        <result property="pointsBalance" column="points_balance" />
+        <result property="createdAt" column="created_at" />
+        <result property="updatedAt" column="updated_at" />
+    </resultMap>
+
+    <select id="findByLoginAccount" parameterType="string" resultMap="AgentMap">
+        SELECT id, name, login_account, password_hash, status, points_balance, created_at, updated_at
+        FROM agent
+        WHERE login_account = #{loginAccount}
+        LIMIT 1
+    </select>
+</mapper>
+