hibernate映射异常，即使它是在hibernate.cfg中配置的

Question

我得到一个异常说“main”org.hibernate.MappingException：未知实体：com.with.annotations.AddressAsValueObject。但我在hibernate.cfg.xml中将此条目作为<mapping class="com.with.annotations.AddressAsValueObject">。

@Embeddable 
public class AddressAsValueObject {
//All attributes here..
}

@Entity 
@Table (name="USER_WITH_V_ADDRESS")
public class UserDetailsWithAddressValueObject {

@Id
@GeneratedValue(strategy = GenerationType.TABLE)
@Column(name = "USER_ID")
private int id;

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

@Embedded
private AddressAsValueObject addressObj;

@Column(name = "USER_DOB")
private String dob;
 }

客户端类将它们保存到DB：

UserDetailsWithAddressValueObject userDetailsWithAddressValueObject = new          UserDetailsWithAddressValueObject();
    userDetailsWithAddressValueObject.setName("XXX-WITH-ADDRESS");
    userDetailsWithAddressValueObject.setDob("JUN6");

    AddressAsValueObject addressValueObject = new AddressAsValueObject();
    addressValueObject.setCity("PUNE");
    addressValueObject.setStreet("XXXX");
    addressValueObject.setPin("XXXXX");
    userDetailsWithAddressValueObject.setAddressObj(addressValueObject);

    session1.save(addressValueObject);
    session1.save(userDetailsWithAddressValueObject);

我正在使用此映射异常。请帮我解决这个错误？

Answer 1

您正在尝试保存AddressAsValueObject的实例。但AddressAsValueObject不是一个实体。这是一个可嵌入的课程。它无法单独保存。仅作为实际实体的一部分（嵌入式）。

删除对

的调用

session1.save(addressValueObject);