serv-初始mapper

schoolNewsServ/study/src/main/resources/mapper/LearningStatisticsMapper.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="org.xyzh.study.mapper.LearningStatisticsMapper">
+
+    <!-- 基础结果映射 -->
+    <resultMap id="BaseResultMap" type="org.xyzh.common.dto.study.TbLearningStatistics">
+        <id column="id" property="id" jdbcType="VARCHAR"/>
+        <result column="user_id" property="userID" jdbcType="VARCHAR"/>
+        <result column="stat_date" property="statDate" jdbcType="DATE"/>
+        <result column="total_duration" property="totalDuration" jdbcType="INTEGER"/>
+        <result column="resource_count" property="resourceCount" jdbcType="INTEGER"/>
+        <result column="course_count" property="courseCount" jdbcType="INTEGER"/>
+        <result column="complete_count" property="completeCount" jdbcType="INTEGER"/>
+        <result column="create_time" property="createTime" jdbcType="TIMESTAMP"/>
+        <result column="update_time" property="updateTime" jdbcType="TIMESTAMP"/>
+    </resultMap>
+
+    <!-- 基础字段 -->
+    <sql id="Base_Column_List">
+        id, user_id, stat_date, total_duration, resource_count, course_count, 
+        complete_count, create_time, update_time
+    </sql>
+
+    <!-- 通用条件 -->
+    <sql id="Where_Clause">
+        <where>
+            <if test="userID != null and userID != ''">
+                AND user_id = #{userID}
+            </if>
+            <if test="statDate != null">
+                AND stat_date = #{statDate}
+            </if>
+        </where>
+    </sql>
+
+    <!-- selectLearningStatistics -->
+    <select id="selectLearningStatistics" resultMap="BaseResultMap">
+        SELECT 
+        <include refid="Base_Column_List"/>
+        FROM tb_learning_statistics
+        <include refid="Where_Clause"/>
+        ORDER BY stat_date DESC
+    </select>
+
+</mapper>