接口：

@Query(value="select user_name,name from cyd_sys_user,t_user  /*#pageable* ",countQuery="select count(*) from cyd_sys_user,t_user",nativeQuery=true)

Page<Object> find_SQL_obj(Pageable pageable);

获取数据：

Sort sort=new Sort(Direction.DESC,"user_name");
Pageable page=new PageRequest(2,10,sort);//第二页，每页10条
Page<Object> p=userRepository.find_SQL_obj(page);

打印SQL:

select user_name,name from cyd_sys_user,t_user order by user_name desc limit ?, ?

如何实现：

select user_name,name from cyd_sys_user,t_user limit ?, ? order by user_name desc