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我已经完成了我的代码，就像在谷歌的示例中所做的那样。我试图建立一对一的关系。但我收到错误：AnnotationException Referenced property not a (One|Many)ToOne

问题：怎么了？

@Entity
@Table(name = "filesInfo")
@Inheritance(strategy= InheritanceType.JOINED)
public class FileInfo {

    @Id
    @SequenceGenerator(name = "file_info_sequence", sequenceName = "sq_file_info")
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "file_info_sequence")
    @Column(name = "id")
    private long fileID;

    @JsonIgnore
    @OneToOne(mappedBy="fileInfo", cascade=CascadeType.ALL, fetch = FetchType.LAZY)
    private FileContent fileContent;

    //......
}

@Entity
@Table(name="file_content")
public class FileContent{
    @Id
    @Column(name="id", unique=true, nullable=false)
    @GeneratedValue(generator="gen")
    @GenericGenerator(name="gen", strategy="foreign", parameters=@Parameter(name="property",       value="fileInfo"))
    private long fileID;

    @JsonIgnore
    @PrimaryKeyJoinColumn
    private FileInfo fileInfo;
    //....
}

错误： java.lang.IllegalStateException：无法加载 ApplicationContext

原因：org.springframework.beans.factory.BeanCreationException：在 URL [file:src/test/resources/applicationContextTest.xml] 中定义名称为“sessionFactory”的 bean 创建错误：调用 init 方法失败；嵌套异常是 org.hibernate.AnnotationException: Referenced property not a (One|Many)ToOne: FileContent.fileInfo in mappedBy of FileInfo.fileContent

引起： org.hibernate.AnnotationException：引用的属性不是（One|Many）ToOne：FileInfo.fileContent 的 mappedBy 中的 FileContent.fileInfo

…………

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1 回答 1

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答案是在 FileContent.fileInfo 字段中添加 @OneToOne 注释。

于 2013-07-31T13:16:31.810 回答