mybatis实现模糊查询时%%的处理

背景：需要通过mybatis实现简单的字段like模糊查询，%如何处理

方法一：
完整范例查询语句如下：

<select id="queryRecord" resultType="db.model.Record"
            parameterType="java.lang.String">
        select a.recordId as recordID,a.name as name,
        TRIM(TRAILING '.' from b.name) as zoneName,a.content as content,d.name as envName
        from records as a
        left join zones as b on a.zoneID = b.zoneID
        left join (select distinct(zoneId),env from profile) as c on b.zoneID = c.zoneId
        left join t_enviroment as d on c.env = d.id
        where a.content like concat('%',#{searchText},'%') or
        concat(a.name,'.',TRIM(TRAILING '.' from b.name)) like concat('%',#{searchText},'%')
        order by a.recordId;
</select>

通过concat函数，将%和搜索关键字链接起来：

like concat('%',#{searchText},'%') 

方法二：
参数直接添加%，比如还是上面的查询：

// java代码
searchText = '%' +searchText + '%';
queryRecord(searchText);

查询语句：

<select id="queryRecord" resultType="db.model.Record"
            parameterType="java.lang.String">
        select a.recordId as recordID,a.name as name,
        TRIM(TRAILING '.' from b.name) as zoneName,a.content as content,d.name as envName
        from records as a
        left join zones as b on a.zoneID = b.zoneID
        left join (select distinct(zoneId),env from profile) as c on b.zoneID = c.zoneId
        left join t_enviroment as d on c.env = d.id
        where a.content like #{searchText}  
        or concat(a.name,'.',TRIM(TRAILING '.' from b.name)) like #{searchText}
        order by a.recordId;
</select>