hibernate - org.hibernate.type.SerializationException : could not deserialize

Question

我正在使用 Hibernate 的两个表和
我不明白为什么对于特定查询我有这个问题。
我希望有人认识到这个问题。

我有一个表用户

@Entity
@Table(name="user")
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private Long idUser;
private Area area;

//...other get and setter

@OneToOne(fetch=FetchType.EAGER)
@JoinColumn(name="idarea")
public Area getArea() {
return area;
}
}

和一个 table 区

@Entity
@Table(name = "area")
public class Area implements Serializable {
private static final long serialVersionUID = 1L;

@Id @GeneratedValue(strategy=GenerationType.AUTO)
@Column(name="idarea")
private Long idArea;

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

@Column(name="time_start")
private LocalTime timeStart;

//...other get and setter

}

LOGS 说:

15:27:28,140  INFO DefaultLoadEventListener:160 - Error performing load command
org.hibernate.type.SerializationException: could not deserialize
at org.hibernate.util.SerializationHelper.doDeserialize(SerializationHelper.java:262)
at org.hibernate.util.SerializationHelper.deserialize(SerializationHelper.java:306)
at org.hibernate.type.descriptor.java.SerializableTypeDescriptor.fromBytes(SerializableTypeDescriptor.java:130)
at org.hibernate.type.descriptor.java.SerializableTypeDescriptor.wrap(SerializableTypeDescriptor.java:116)
at 
....//other lines
org.springframework.orm.hibernate3.HibernateSystemException: could not deserialize; nested exception is org.hibernate.type.SerializationException: could not deserialize

Answer 1

我建议只在字段或 getter 上设置注释。我更喜欢田地，但这只是我的口味。

见 The Curious case of Field and Property Access in Hibernate :

Thus either place the annotations on the fields only or on the getters(properties) only. Mixing them and not using @Access will cause abnormal behaviour.

然后，如果序列化是您的应用程序的一部分，我会建议使用工具生成更好的 serialVersionUID。