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我收到以下错误之前保存的瞬态的实例，当我试图让使用Hibernate + PostgreSQL的休眠：对象引用一个未保存的瞬态的实例 - 冲洗
myObject的列表：
@Entity
@Table(name = "my_objects", schema = "public")
public class MyObject implements java.io.Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(name = "my_object_id", unique = true, nullable = false)
@GeneratedValue
private long myObjectId;
@ManyToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@JoinColumn(name = "owner_id")
private User user;
@Column(name = "scheme_zone_name", length = 150)
private String schemeZoneName;
@Temporal(TemporalType.DATE)
@Column(name = "create_dt", length = 13)
private Date createDt;
@Column(name = "comment", length = 250)
private String comment;
public MyObject() {
}
public MyObject(long myObjectId) {
this.myObjectId = myObjectId;
}
public MyObject(long myObjectId, User user, String myObjectName, Date createDt, String) {
this.schemeZoneId = schemeZoneId;
this.user = user;
this.myObjectName = myObjectName;
this.createDt = createDt;
this.comment = comment;
} ....getters/setters .....}
用户：
@Entity
@Table(name = "dp_users", schema = "public")
public class User implements java.io.Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(name = "user_id", unique = true, nullable = false, precision = 5, scale = 0)
@GeneratedValue
private int userId;
@Column(name = "user_login", nullable = false, length = 25)
private String userLogin;
@Column(name = "user_password", nullable = false, length = 25)
private String userPassword;
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "user")
private Set<MyObject> myObjects = new HashSet(0);
public User() {
}
public User(int userId, String userLogin, String userPassword) {
this.userId = userId;
this.userLogin = userLogin;
this.userPassword = userPassword;
}
public User(int userId, String userLogin, String userPassword, Set<MyObject> myObjects) {
this.userId = userId;
this.userLogin = userLogin;
this.userPassword = userPassword;
this.myObjects = myObjects;
} ....getters/setters .....}
起初我将用户保存到用户对象中：
public User login(String login, String password) {
Session session = null;
try {
session = HibernateUtil.getSessionFactory().openSession();
return (User) session.createCriteria(User.class)
.add(Restrictions.eq("userLogin", login).ignoreCase())
.add(Restrictions.eq("userPassword", password)).uniqueResult();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (session != null && session.isOpen()) {
session.close();
}
}
return null;
}
然后，当我试图通过用户获得的MyObject的列表：
public List<MyObject> getMyObjects(User user) throws SQLException {
List<MyObject> o = null;
Session session = null;
try {
session = HibernateUtil.getSessionFactory().openSession();
o = session.createCriteria(MyObject.class)
.add(Restrictions.eq("user", user))
.addOrder(Order.asc("myObjectName"))
.list();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (session != null && session.isOpen()) {
session.close();
}
}
return o;
}
我收到
org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: cc.testProject.common.User
我做了什么错？