gold-java/src/main/resources/cashMapper/MessageMapper.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.example.demo.mapper.cash.MessageMapper">
    <update id="update">
        update message
        set flag=1
        where id=#{id}
    </update>
    <select id="getMessage" resultType="com.example.demo.domain.vo.coin.Messages">
        SELECT id, jwcode, name, title, `desc`, status, market,type, type_id,flag,cz_time
        FROM message
        <where>
            flag=0
            <choose>
                <when test="status != null and status.size() > 0">
                    and status IN
                    <foreach item="item" collection="status" open="(" separator="," close=")">
                        #{item}
                    </foreach>
                </when>
            </choose>
            <choose>
                <when test="markets != null and markets.size() > 0">
                   and market IN
                    <foreach item="item" collection="markets" open="(" separator="," close=")">
                        #{item}
                    </foreach>
                </when>
            </choose>
                    ORDER BY cz_time DESC
        </where>
    </select>
</mapper>