基于这个例子，我尝试在我的应用程序中实现Spring Security 。然而，我不能登录，只有当我注册，它做自动登录。当我想在注销后登录时，示例应用程序执行以下语句：

Hibernate: select user0_.id as id1_1_, user0_.email as email2_1_,
user0_.password as password3_1_, user0_.username as username4_1_ 
from user user0_ where user0_.username=?

Hibernate: select roles0_.users_id as users_id1_2_0_, 
roles0_.roles_id as roles_id2_2_0_, role1_.id as id1_0_1_, 
role1_.name as name2_0_1_ 
from user_roles roles0_ inner join role role1_ on roles0_.roles_id=role1_.id 
where roles0_.users_id=?

另一方面，我的应用程序只执行以下语句：

Hibernate: select user0_.id as id1_1_, user0_.email as email2_1_, 
user0_.password as password3_1_, user0_.username as username4_1_ 
from user user0_ where user0_.username=?

那里少了些什么，我想不出是什么。