dao中定義方法：

List<KeyValueEntity> groupByDay(Date startDate, Date endDate);

在早期，參數(shù)沒(méi)做注解時(shí)默認(rèn)是按順序獲取，以0、1等為索引，所以Mapper是這樣寫(xiě)的：

    <select id="groupByDay" resultType="io.renren.modules.business.entity.template.KeyValueEntity">
        select DATE_FORMAT(create_time, '%Y/%m/%d') as keyText, count(*) as value
        from question_answer
        where create_time BETWEEN #{0, jdbcType=DATE} AND #{1, jdbcType=DATE}
        group by keyText
        order by keyText
    </select>

后來(lái)由0、1改為用arg0、arg1代替：

    <select id="groupByDay" resultType="io.renren.modules.business.entity.template.KeyValueEntity">
        select DATE_FORMAT(create_time, '%Y/%m/%d') as keyText, count(*) as value
        from question_answer
        where create_time BETWEEN #{arg0, jdbcType=DATE} AND #{arg1, jdbcType=DATE}
        group by keyText
        order by keyText
    </select>

而新版的又改成以參數(shù)名使用：

    <select id="groupByDay" resultType="io.renren.modules.business.entity.template.KeyValueEntity">
        select DATE_FORMAT(create_time, '%Y/%m/%d') as keyText, count(*) as value
        from question_answer
        where create_time BETWEEN #{startDate, jdbcType=DATE} AND #{endDate, jdbcType=DATE}
        group by keyText
        order by keyText
    </select>

對(duì)于當(dāng)前庫(kù)的強(qiáng)制更新，可以使用命令：

mvn clean install -U

對(duì)于下面打包命令，也是會(huì)使用新庫(kù)：

mvn clean package