spring框架的@Param注解的使用

框架环境为Spring+SpringSecurity+Mybatis框架

我是一个小白，最近看公司项目，发现在Mapper层有这样一段代码：

List<T> findAll(@Param("query") Map<String, Object> params);

然后找到对应的XML如下：

<select id="findAll" parameterType="java.util.Map" resultType="WorkKing">
   SELECT
   <include refid="column" />
   FROM s_work_kind w
   where w_id=#{queryId}
   <if test="query.name !=null and query.name != ''">
      AND (w.name LIKE CONCAT('%',#{query.name,jdbcType=VARCHAR},'%')
      or w.code LIKE CONCAT('%',#{query.name,jdbcType=VARCHAR},'%'))
   </if>
   <if test="query.status !=null and query.status !=''">
      AND w.status=#{query.status}
   </if>
   <!-- 只有性别不为空才会区间查询 -->
   <if test="query.gender != null and query.gender !=''">
      <if test="query.gender == 0 &amp; query.startyear!=null and query.startyear!=0 &amp;query.stopyear!=null and query.stopyear!=0">
         AND w.man_year BETWEEN #{query.startyear} AND #{query.stopyear}
      </if>
      <if test="query.gender == 1 &amp; query.startyear!=null and query.startyear!=0 &amp;query.stopyear!=null and query.stopyear!=0">
         AND w.woman_year BETWEEN #{query.startyear} AND #{query.stopyear}
      </if>
   </if>
   ORDER BY w.create_date
</select>