sql - 如何在hibernate struts2中进行一对多映射

Question

我有一张桌子

login [login_id, login name]

user[username, login_id, domain_id]

doamin[domain_id,domain_name]

我将传递一个登录名。我需要获取 sql 查询的域名

SELECT m_domain.email  FROM    (   ots_web.m_user m_user
       JOIN
          ots_web.m_domain m_domain
       ON (m_user.domain_fk = m_domain.domain_pk_id))
   JOIN
      ots_web.m_login m_login
   ON (m_user.login_fk = m_login.login_pk_id)  WHERE (m_login.uname = 'jai')

如何在使用 struts2 的 hibernate 中执行此操作

Answer 1

select d.domain_name
from login l
  inner join user u on u.login_id = l.login_id
  inner join domain d on d.domain_id = u.domain_id
where l.login_name = 'value'