查询代码如下
<!-- 根据params(匹配) searchPram(模糊字段) sortPram(排序) 查询 返回单个数据-->
<select id="getByParam" resultMap="User" parameterType="java.util.Map" >
select
<include refid="Base_Column_List" />
from user
<if test="params!= null" >
where
<trim suffixOverrides=" and " >
<foreach collection ="params.keys" item="key" index= "index" separator =" and " >
${key}= #{params[${key}]}
</foreach>
</trim>
</if>
<if test="searchParams!=null" >
<if test="params==null" >
where
</if>
<if test="params!=null" >
and
</if>
</if>
<if test="searchParams != null" >
<trim prefix="(" suffix=")" suffixOverrides=" or " >
<foreach collection ="searchParams.keys" item="key" index= "index" separator =" or " >
${key} like #{searchParams[${key}]}
</foreach>
</trim>
</if>
<if test="sortParams != null" >
order by
<trim suffixOverrides=",">
<foreach collection ="sortParams.keys" item="key" index= "index" separator=",">
#{sortParams[${key}]} ${key}
</foreach>
</trim>
</if>
limit 0,1
</select>
执行结果
22:05:44.292 [http-bio-80-exec-8] DEBUG com.xjt.dao.UserDao.getByParam - ==> Preparing: select id, userName, password, age from user where userName= ? order by ? desc limit 0,1
22:05:44.292 [http-bio-80-exec-8] DEBUG com.xjt.dao.UserDao.getByParam - ==> Parameters: 230(String), id(String)
22:05:44.293 [http-bio-80-exec-8] DEBUG com.xjt.dao.UserDao.getByParam - <== Total: 1
从结果上看 order by 后的？无法被识别为关键字。求有经验的大神指点！
