Java Hibernate，Criteria.list（）返回我期望的更多行

我对spring和hibernate的项目有问题：

在我的数据库（mysql）中，我有以下表：

table Operator{
     idOperator int(12) primary key auto_increment,
     name varchar(20),
     surname varchar(20),
     username varchar(20),
     password varchar(20),
     type varchar(2)
     } engin=InnoDB;

 table Customer{
      idCustomer int primary key,
      name varchar(20),
      surname varchar(20),
      lastOrder date,
 } engine = InnoDB;

以及前两个表之间的多对多关系：

table portfolio{
    idOperator int,
    idCustomer int,
    foreign key(idOperator) references Operator(idOperator)on update cascade on delete cascade
    foreign key(idCustomer) references Customer(idCustomer) on update cascade on delete cascade
}engine = InnoDB;

在运算符的实体类中，我以以下方式映射表：

@Id
@Column(name = "idOperator")
@GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;

@Column(name = "name")
private String name;

@Column(name = "surname")
private String surname;

@Column(name = "username")
private String username;

@Column(name = "password")
private String password;

@Column(name = "type")
private String type;

@ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
@JoinTable(name = "portfolio", joinColumns = {
    @JoinColumn(name = "idOperator")}, inverseJoinColumns = {
    @JoinColumn(name = "idCustomer")
})
private List<Customer> customers = new ArrayList<Customer>();

结果包括每个操作员在关系“投资组合”中参与的次数相等的时间数

有人能帮我吗？谢谢

请尝试以下方法：

Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Operator.class);
    criteria.add(Restrictions.eq("type","ad"));
criteria.setProjection(Projections.distinct(Projections.property("id")))
    return criteria.list();

---

尝试在您的标准中使用Projections.distinct我尝试了您的提示，但我得到了以下错误：javax.el.PropertyNotFoundException:在java.lang.Integer类型上找不到属性“id”？您的实体中是否有id的getter和setter？是的，现在我解决了添加以下行的问题：criteria.setResultTrasformer（criteria.distinct\u ROOT\u entity）；

Criteria criteria = sessionFactory.getCurrentSession().createCriteria(Operator.class);
    criteria.add(Restrictions.eq("type","ad"));
criteria.setProjection(Projections.distinct(Projections.property("id")))
    return criteria.list();