Hibernate多对多注解配置实例

hibernate多对多注解配置

/*Role.java*/

@ManyToMany(mappedBy = "roles",fetch = FetchType.LAZY)
Set<User> users = new TreeSet<>();

/*User.java*/

@ManyToMany(fetch = FetchType.LAZY)
private Set<Role> roles = new TreeSet<>();

/*RoleDaoImpl.java*/

@Override
public boolean deleteRolesByIdList(List<String> idList) {

Session session = factory.getCurrentSession();

idList.stream().map(this::getRoleById).forEach(r -> {
r.getUsers().stream().forEach(u -> u.getRoles().remove(r));
session.delete(r);
});

return true;