1. findByIds(List ids)
如果参数的类型是List, 则在使用时,collection属性要必须指定为 list
<select id="findByIdsMap" resultMap="BaseResultMap">
Select
<include refid="Base_Column_List" />
from jria where ID in
<foreach item="item" index="index" collection="list" open="(" separator="," close=")">
#{item}
</foreach>
</select>
2:findByIds(Long[] ids)
如果参数的类型是Array,则在使用时,collection属性要必须指定为 array
<select id="findByIdsMap" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from tabs where ID in
<foreach item="item" index="index" collection="array" open="(" separator="," close=")">
#{item}
</foreach>
</select>
3. findByIds(String name, Long[] ids)
当查询的参数有多个时:
这种情况需要特别注意,在传参数时,一定要改用Map方式, 这样在collection属性可以指定名称
Map<String, Object> params = new HashMap<String, Object>(2);
params.put("name", name);
params.put("ids", ids);
mapper.findByIdsMap(params);
<select id="findByIdsMap" resultMap="BaseResultMap">
select
<include refid="Base_Column_List" />
from tabs where
name = #{name}
and ID in
<foreach item="item" index="index" collection="ids" open="(" separator="," close=")">
#{item}
</foreach>
</select>