我尝试保留一个实体对象,但收到一个讨厌的IllegalArgumentException。查看stacktrace并没有给我太多信息。休眠会以某种方式尝试将实体对象的id字段设置为实际实体。
这里是堆栈跟踪:
Caused by: org.hibernate.property.access.spi.PropertyAccessException: Error accessing field [private java.lang.Long com.hosting.hostinginterface.spring.user.User.id] by reflection for persistent property [com.hosting.hostinginterface.spring.user.User#id] : com.hosting.hostinginterface.spring.user.User@246a5eb6
at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:75) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:5411) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
at org.hibernate.persister.entity.AbstractEntityPersister.isTransient(AbstractEntityPersister.java:5036) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
at org.hibernate.engine.internal.ForeignKeys.isTransient(ForeignKeys.java:292) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
at org.hibernate.event.internal.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:529) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:102) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:62) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
at org.hibernate.event.service.internal.EventListenerGroupImpl.fireEventOnEachListener(EventListenerGroupImpl.java:108) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:680) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
... 76 common frames omitted
Caused by: java.lang.IllegalArgumentException: Can not set java.lang.Long field com.hosting.hostinginterface.spring.user.User.id to com.hosting.hostinginterface.spring.user.User
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:167) ~[na:1.8.0_231]
at sun.reflect.UnsafeFieldAccessorImpl.throwSetIllegalArgumentException(UnsafeFieldAccessorImpl.java:171) ~[na:1.8.0_231]
at sun.reflect.UnsafeFieldAccessorImpl.ensureObj(UnsafeFieldAccessorImpl.java:58) ~[na:1.8.0_231]
at sun.reflect.UnsafeObjectFieldAccessorImpl.get(UnsafeObjectFieldAccessorImpl.java:36) ~[na:1.8.0_231]
at java.lang.reflect.Field.get(Field.java:393) ~[na:1.8.0_231]
at org.hibernate.property.access.spi.GetterFieldImpl.get(GetterFieldImpl.java:71) ~[hibernate-core-6.0.0.Alpha3.jar:6.0.0.Alpha3]
... 84 common frames omitted
这是我的实体类别:
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
@Column(name = "id", updatable = false, nullable = false)
private Long id;
@Column(name = "username", nullable = false)
private String userName;
@Column(name = "firstName", nullable = false)
private String firstName;
@Column(name = "lastName", nullable = false)
private String lastName;
private LocalDate birthday;
@Column(name = "birthdate", nullable = false)
private String birthdayText;
public User() {
}
@Contract(pure = true)
public User(String userName, String firstName, String lastName, @NotNull LocalDate birthday) {
this.userName = userName;
this.firstName = firstName;
this.lastName = lastName;
this.birthday = birthday;
birthdayText = birthday.toString();
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public LocalDate getBirthday() {
return birthday;
}
public void setBirthday(LocalDate birthday) {
this.birthday = birthday;
}
public String getBirthdayText() {
return birthdayText;
}
public void setBirthdayText(String birthdayText) {
this.birthdayText = birthdayText;
}
public Long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
}
更改id的生成方法似乎无法解决该错误,因此我没有可能的答案...
对于id
字段尝试此操作
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id")
private Long id;