我有以下 dao 方法:
@Override
public List<AdminRole> findAll() {
Session session = sessionFactory.getCurrentSession();
Criteria criteria = session.createCriteria(AdminRole.class);
criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
return criteria.list();
}
实际上我想从数据库中检索所有条目。
有时我会看到重复的内容。当我使用 AdminRole 添加用户时会发生这种情况。
我读到当我使用时这是可能的EAGER
获取类型,这应该修复添加以下行:
criteria.setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
但这对我没有帮助。
我的映射:
@Entity
@Table(name = "terminal_admin_role")
public class AdminRole {
@Id
@Column(name = "role_id", nullable = false, unique = true)
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "user_id")
@SequenceGenerator(name = "user_id", sequenceName = "user_id")
private Long adminId;
@Column(name = "role")
private String role;
public AdminRole(String role) {
this.role = role;
}
public AdminRole() {
}
// get set
@Override
public String toString(){
return role;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof AdminRole)) {
return false;
}
AdminRole adminRole = (AdminRole) o;
if (!role.equals(adminRole.role)) {
return false;
}
return true;
}
@Override
public int hashCode() {
return role.hashCode();
}
}
and
@Entity
@Table(name = "terminal_admin")
public class TerminalAdmin {
@ManyToMany(fetch=FetchType.EAGER,cascade=CascadeType.ALL)
@JoinTable(name = "admin_role", joinColumns = {
@JoinColumn(name = "admin_id", nullable = false) },
inverseJoinColumns = { @JoinColumn(name = "role_id",
nullable = false) })
private Set<AdminRole> adminRoles;
//...
}
P.S.
我无法切换获取类型。
我不想将此列表放入集合中。