<select id="getContractList" resultType="com.lqb.web.entity.Contract" parameterType="com.lqb.web.entity.Contract">
select a.id , a.contract_num,date_format(a.start_date,'%Y-%m-%d') AS startDate, date_format(a.end_date,'%Y-%m-%d') AS endDate,
date_format(a.rent_start_date,'%Y-%m-%d') AS rentStartDate,a.state,a.type,a.reson,
a.room_type as roomType,a.price as price ,a.remarks as remarks,a.create_date as createDate,a.create_by as createBy,a.pay_type1 as payType1,
a.pay_type2 as payType2,b.mansion_id as mansionId,b.`name` as ` rentRoom.name`,b.`area` as `rentRoom.area`,
c.`name` as `tenantry.name`,c.`contact` as `tenantry.contact`,c.`mobile` as `tenantry.mobile`,c.`company_type` as `tenantry.companyType`,c.`employee_count` as `tenantry.employeeCount`,
e.`name` as `letter.name`,e.`company_address` as `letter.companyAddress`,a.deposit,u.name AS createUser
FROM contract a
left JOIN rent_room b ON a.`id`=b.`contract_id`
left JOIN tenantry c ON a.`id`=c.`contract_id`
left JOIN letter e ON a.`id`=e.`contract_id`
left join user u on a.create_by = u.id
<where>
(c.state!=-1 OR c.state is NULL)
<if test="name != null">
AND a.name like #{name}
</if>
<if test="createBy != null">
and a.create_by = #{createBy}
</if>
<if test="mansionId!= null">
AND b.mansion_id = #{mansionId}
</if>
<if test="letter != null and letter.name != null and letter.name != ''">
and e.name like #{letter.name}
</if>
<if test="tenantry != null and tenantry.name != null and tenantry.name != ''">
and c.name like #{tenantry.name}
</if>
<if test="area != '' and area != null ">
and area = #{area}
</if>
<if test="minArea != '' and minArea != null and maxArea != '' and maxArea != null">
<![CDATA[
and b.area >= #{minArea}
AND b.area <= #{maxArea}
]]>
</if>
<if test="startDate != '' and startDate != null and endDate != '' and endDate != null">
<![CDATA[
and (DATE_FORMAT(a.start_date, '%Y-%m-%d') BETWEEN DATE_FORMAT(#{startDate}, '%Y-%m-%d') AND DATE_FORMAT(#{endDate}, '%Y-%m-%d')
OR DATE_FORMAT(a.end_date, '%Y-%m-%d') BETWEEN DATE_FORMAT(#{startDate}, '%Y-%m-%d') AND DATE_FORMAT(#{endDate}, '%Y-%m-%d')
OR DATE_FORMAT(#{startDate}, '%Y-%m-%d') BETWEEN DATE_FORMAT(a.start_date, '%Y-%m-%d') AND DATE_FORMAT(a.end_date, '%Y-%m-%d')
OR DATE_FORMAT(#{endDate}, '%Y-%m-%d') BETWEEN DATE_FORMAT(a.start_date, '%Y-%m-%d') AND DATE_FORMAT(a.end_date, '%Y-%m-%d'))
]]>
</if>
<if test="startDate == null and endDate != null">
<![CDATA[
AND DATE_FORMAT(end_date, '%Y-%m-%d') <= DATE_FORMAT(#{endDate}, '%Y-%m-%d')
]]>
</if>
<if test="chooseStartDate != '' and chooseStartDate != null and chooseEndDate != '' and chooseEndDate != null">
<![CDATA[
and (DATE_FORMAT(a.start_date, '%Y-%m-%d') BETWEEN DATE_FORMAT(#{chooseStartDate}, '%Y-%m-%d') AND DATE_FORMAT(#{chooseEndDate}, '%Y-%m-%d')
OR DATE_FORMAT(a.end_date, '%Y-%m-%d') BETWEEN DATE_FORMAT(#{chooseStartDate}, '%Y-%m-%d') AND DATE_FORMAT(#{chooseEndDate}, '%Y-%m-%d')
OR DATE_FORMAT(#{chooseStartDate}, '%Y-%m-%d') BETWEEN DATE_FORMAT(a.start_date, '%Y-%m-%d') AND DATE_FORMAT(a.end_date, '%Y-%m-%d')
OR DATE_FORMAT(#{chooseEndDate}, '%Y-%m-%d') BETWEEN DATE_FORMAT(a.start_date, '%Y-%m-%d') AND DATE_FORMAT(a.end_date, '%Y-%m-%d'))
]]>
</if>
<if test="payType1 != '' and payType1 != null ">
AND pay_type1 = #{payType1}
</if>
<if test="payType2 != '' and payType2 != null ">
AND pay_type2 = #{payType2}
</if>
<if test="roomType != '' and roomType != null ">
AND room_type = #{roomType}
</if>
<if test="mansionId != '' and mansionId != null ">
AND b.mansion_id = #{mansionId}
</if>
<if test="states != null">
AND a.state in <foreach item="item" collection="states" index="index" open="(" separator="," close=")">#{item}</foreach>
</if>
</where>
ORDER BY a.`create_date` DESC
Limit #{startPos},#{pageSize}
</select>
按照官方文檔關(guān)于 if 的說(shuō)明,item 是 states 這個(gè)集合中的元素,這是 foreach 標(biāo)簽中 item 屬性指定的名稱,而 states 應(yīng)該是外部傳入的參數(shù)。
<if test="states != null">
AND a.state in <foreach item="item" collection="states" index="index" open="(" separator="," close=")">#{item}</foreach>
</if>
這句話的意思是判斷states集合是否為空,不為空,遍歷,item是集合中迭代時(shí)的別名
oreach元素的屬性主要有item,index,collection,open,separator,close。
item:集合中元素迭代時(shí)的別名,
index:集合中元素迭代時(shí)的索引
open:常用語(yǔ)where語(yǔ)句中,表示以什么開始,比如以'('開始
separator:表示在每次進(jìn)行迭代時(shí)的分隔符,
close 常用語(yǔ)where語(yǔ)句中,表示以什么結(jié)束,
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