mybatis-xml中写sql语句

1.时间参数比较
2.mybatis中if–else if
没有if–else

    "getMyAbsentList" resultType="com.dayou.cloud.sys.entity.BscAbsent">
        select a.* from bsc_absent a,map_student_class b 
        where a.partyid = b.studentid and b.classid = #{classid} and a.state='nor'
        <if test="type!=null and type!=''">
        and a.type=#{type}
        if>
        <if test="starttime!=null and starttime!=''">
            and a.starttime>=#{starttime}
        if>

        
            "endtime!=null and endtime!=''">
                and a.endtime<=#{endtime}
            
            
                and a.endtime>=now()