backend-duoji-monitor/web/src/main/resources/mapper/OrderMapper.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zhehekeji.web.mapper.OrderMapper">

    <select id="list" parameterType="com.zhehekeji.web.pojo.OrderSearch" resultType="com.zhehekeji.web.pojo.OrderVO">
        select t.*
        from `order` t
        <where>
            <if test="req.orderNum != null and req.orderNum != ''">
                and t.order_num = #{req.orderNum}
            </if>
            <if test="req.startTimestamp != null and req.endTimestamp != null">
                and t.start_time >= #{req.startTimestamp} and t.start_time &lt;= #{req.endTimestamp}
            </if>
            <if test="req.streetId != null and req.streetId != ''">
                and t.street_id = #{req.streetId}
            </if>
        </where>
        order by t.id desc
    </select>

</mapper>