Mybatis 传入参数为数组或者是集合

代码如下
int[] a = {1,2};
List list=userDao.findStudent(a);

Mapper文件如下，其中parameterType可以不写，但是foreach标签中的 collection属性必须为array,如果是集合的话则必须为list,
 <select id="findStudent" resultType="Student" >
  select * from student
  where 1=1
  <if test="array != null and array.length != 0">
      and nianji in
      <foreach collection="array" open="(" separator="," close=")" item="nianji" index="index">
          #{nianji}
      </foreach>
  </if>
</select>