06_多对一联系关系映射[转]

06_多对一关联映射[转]

输出的SQL是:Hibernate: select employee0_.id as id1_0_, employee0_.`name` as name2_1_0_, employee0_.depart_id as depart3_1_0_ from Employee employee0_ where employee0_.id=? Hibernate: select department0_.id as id0_0_, department0_.`name` as name2_0_0_ from Department department0_ where department0_.id=? 做了两次查询, 没有使用 join on ,  想使用join on 还要配置. 默认不用. 关于懒加载,  会在以后的文章中专门讲, 这里先不讲, 只是用了用 Hibernate.initialize(em.getDepart()) 提前加载