Mybatis 参数List查询

1）java代码

Map<String, Object> param = new HashMap<>();
List<Integer> idList = new ArrayList<>();
param.put("arr", idList);

2）mybatix.xml

SELECT * FROM table
WHERE 1 = 1
<if test="arr != null">
    AND id IN
    <foreach item="item" index="index" collection="arr" open="("  close=")" separator=",">  
                #{item}   
    </foreach>  
</if>