ttc_5.0/ttc-backen/target/classes/mapper/ImMessageMapper.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="cn.ubitech.ttc.dao.ImMessageMapper">

    <!-- 开启二级缓存 -->
    <!--<cache type="org.mybatis.caches.ehcache.EhcacheCache">-->
        <!--<property name="timeToIdleSeconds" value="3600"/>-->
        <!--<property name="timeToLiveSeconds" value="3600"/>-->
        <!--<property name="maxEntriesLocalHeap" value="1000"/>-->
        <!--<property name="maxEntriesLocalDisk" value="10000000"/>-->
        <!--<property name="memoryStoreEvictionPolicy" value="LRU"/>-->
    <!--</cache>-->
    <select id="getUserMessage" resultType="cn.ubitech.ttc.model.im.IMMessageModel">
        SELECT i.*
        FROM (select *
              from im_message
              where userid = #{userid} and reciverid = #{reciverid} and type = #{type}
                    and isactive = 1
              union select *
                    from im_message
                    where userid = #{reciverid} and reciverid = #{userid} and type = #{type} and isactive = 1) i
        <if test='snowflakeid != "0"'>
            where i.messageid &lt; #{snowflakeid}
        </if>
        ORDER by i.messagetime DESC
    </select>
    <select id="getUserMessageCount" resultType="java.lang.Integer">
        SELECT count(*)
        from (
                 SELECT i.*
                 FROM (select *
                       from im_message
                       where userid = #{userid} and reciverid = #{reciverid} and type = #{type}
                             and isactive = 1
                       union select *
                             from im_message
                             where
                                 userid = #{userid} and reciverid = #{reciverid} and type = #{type} and isactive = 1) i
                         <if test='snowflakeid != "0"'>
                              where i.messageid &lt; #{snowflakeid}
                         </if>
             ) b
    </select>

</mapper>