MyBatis自定義參數排序
注意事項(很容易掉坑):
1. 正常傳參使用#{}來接收參數,比如:m.grade = #{memberOrderBean.memberGrade},但是要排序的話order by後面需要使用${}符號,否則怎麼排序失效。
2. 當使用了@Param修飾參數的時候,xml裏面的parameterType不需要寫。
Dao
/**
* 會員層級和會員購買詳情搜索(共用該方法)
* @author jacklin
* @since 2020年09月18日
*/
List<MemberOrderBean> searchMemberGradeDetailList(Page<MemberOrderBean> page, @Param("memberOrderBean") MemberOrderBean memberOrderBean);
xml
<!-- 會員層級和會員購買詳情共用查詢 -->
<select id="searchMemberGradeDetailList" resultType="org.jeecg.modules.member.bean.MemberOrderBean">
SELECT m.grade memberGrade, m.pin, m.name memberName, m.phone, m.first_shopping_time, s.goods_code, s.goods_name, m.lately_buy_date,
m.shop_type, m.tag, m.tops_six, m.scm_money_six, m.scm_counts orderCounts, m.scm_money actualPay from member m
join sc_order s on m.name = s.sc_member_name
<where>
<if test="memberOrderBean.pin!=null and memberOrderBean.pin!=''">
AND m.pin = #{memberOrderBean.pin}
</if>
<if test="memberOrderBean.memberGrade!=null and memberOrderBean.memberGrade!=''">
AND m.grade = #{memberOrderBean.memberGrade}
</if>
<if test="memberOrderBean.memberName!=null and memberOrderBean.memberName!=''">
AND m.name = #{memberOrderBean.memberName},
</if>
<if test="memberOrderBean.phone!=null and memberOrderBean.phone!=''">
AND m.phone = #{memberOrderBean.phone}
</if>
<if test="memberOrderBean.tag!=null and memberOrderBean.tag!=''">
AND m.tag = #{memberOrderBean.tag}
</if>
<if test="memberOrderBean.goodsCode!=null and memberOrderBean.goodsCode!=''">
AND s.goods_code = #{memberOrderBean.goodsCode}
</if>
<if test="memberOrderBean.shopType!=null and memberOrderBean.shopType!=''">
AND s.shop_type = #{memberOrderBean.shopType}
</if>
<if test="memberOrderBean.latelyBuyDate_begin!=null and memberOrderBean.latelyBuyDate_begin!=''">
AND m.lately_buy_date between #{memberOrderBean.latelyBuyDate_begin} and #{memberOrderBean.latelyBuyDate_end}
</if>
</where>
AND s.goods_code not REGEXP 'UYCJ|UYSB|UYHC|UYBC|US|WPK|S1|S2|S3|CHM'
GROUP BY m.name
//注意排序使用${}符號,並且在GROUP BY 之後
<if test="memberOrderBean.column!=null and memberOrderBean.order!=null">
order by ${memberOrderBean.column} ${memberOrderBean.order}
</if>
</select>
排序原來是(錯誤的寫法):
<if test="memberOrderBean.column!=null and memberOrderBean.column!=''">
order by #{memberOrderBean.column}
</if>
應該是改成這樣(正確的寫法):
<if test="memberOrderBean.column!=null and memberOrderBean.column!=''">
order by ${memberOrderBean.column}
</if>