Mybatis if clause

<select id="getMarks" parameterType="java.util.Map" resultMap="BaseResultMap">
        SELECT
        *
        FROM
        test
        WHERE 1=1
--     //匹配字段的id语句
        <if test="family != null">
            AND family =#{family,jdbcType=VARCHAR}
        </if>
--         注意，GROUP 是关键字不能用来当columnTTTTT
        <if test="grouper != null">
            AND grouper =#{grouper,jdbcType=VARCHAR}
        </if>
        <if test="branch != null">
            AND branch =#{branch,jdbcType=VARCHAR}
        </if>
        <if test="language != null">
            AND languager =#{language,jdbcType=VARCHAR}
        </if>
    </select>