根据List mybatis批量查询List结果

@Repository
public interface UserMapper {
List<String> queryNamesByIds(Map<String, Object> userIdsParam);
}

@Named
public class UserServiceImpl implements UserService {

@Override
public List<String> queryNamesByIds(List<Integer> userIds) {
Map<String, Object> userIdsParam = new HashMap<String, Object>();
userIdsParam.put("userIds", userIds);
return this.userMapper.queryNamesByIds(userIdsParam);
}
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mybatis.mapper.UserMapper">

<select id="queryNamesByIds" resultType="java.lang.String">
SELECT
name
from user
WHERE id in
<foreach collection="userIds" item="id" open="(" close=")"
separator=",">
#{id}
</foreach>
</select>
</mapper>