<insert id="saveByList" useGeneratedKeys="true" parameterType="java.util.List">

     insert into T_App_Default_User(UserID,AppType,CreateTime)

    values

    <foreach collection="list" item="item" index="index" separator="," >

        (#{item.userId},#{item.appType},now())

    </foreach>

    </insert>
    

public interface AppDefaultUserMapper {

    void saveByList(List<Map<String, Long>> list);

}