java - Hibernate session.save() 总是返回 1

Question

我在 session.save() 中得到了一个奇怪的结果。它总是返回 1。但数据库中的值已正确插入。请提出您发现的任何疑问

代码

session = getSessionFactory().openSession();
Transaction transaction = session.beginTransaction();
userId = (Long)session.save(user);
transaction.commit();

用户 - 持久性

@Id
@GeneratedValue(strategy=GenerationType.SEQUENCE)
@GenericGenerator(name = "increment", strategy = "increment")
@Column(name = "ID")
public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

@Column(name = "USERNAME", length = 100)
public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}

@Column(name = "PASSWORD", length = 100)
public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

@OneToOne(fetch = FetchType.EAGER)
@MapsId
@JoinColumn(name = "ROLEID")
public Role getRole() {
    return role;
}

public void setRole(Role role) {
    this.role = role;
}

@Column(name = "IMAGEURL", length = 2000)
public String getImageUrl() {
    return imageUrl;
}

public void setImageUrl(String imageUrl) {
    this.imageUrl = imageUrl;
}

版本

hibernate :4.3.7 最终版本

Spring :4.1.2

Answer 1

提到这个问题Difference between @GeneratedValue and @GenericGenerator .

问题可能出在您的 @GeneratedValue 上。

所以你可以改变

@GeneratedValue(strategy=GenerationType.SEQUENCE)

到

@GeneratedValue(generator="increment")

注意:可以引用 this 将您的数据库序列分配给@GeneratedValue