Hibernate mappedBy

請告訴我爲什麼我錯誤地鏈接了這些表格。 PM org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl stop INFO：HHH000030：清理連接池[jdbc：oracle：thin：@ ARS-PS-DEV：1521：ars] 線程「main」 java.lang.ExceptionInInitializerError：Initial SessionFactory failedorg.hibernate.AnnotationException：mappedBy引用未知目標實體屬性：com.ecls.ARSTools.DAO.Certificate.certificateFields中的com.ecls.ARSTools.DAO.CertificateField.сertificate at com.ecls .ARSTools.Tools.HibernateSessionFactory.buildSessionFactory（HibernateSessionFactory.java:21） at com.ecls.ARSTools.Tools.HibernateSessionFactory。（HibernateSessionFactory.java:10） at com.ecls.ARSTools.Tools.ImplARS。（ImplARS.java ：14） at ecls.temp.AppMain.main（AppMain.java:16）Hibernate mappedBy

@Entity 
    @Table(name= "CERTIFICATE") 
    public class Certificate implements IAvailableID{ 
     @Id 
     @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "cert_generator") 
     @SequenceGenerator(name="cert_generator", sequenceName = "SWS_CERTIFICATE_ID", allocationSize=1) 
     @Column(name = "ID") 
     private Long id; 

     @Column(name= "NAME", unique = true, nullable = false, length=50) 
     private String name; 

     @OneToMany(targetEntity=CertificateField.class, mappedBy = "сertificate", cascade = CascadeType.ALL, fetch = FetchType.LAZY) 
     private List<CertificateField> certificateFields=new ArrayList<CertificateField>(); 

     public Certificate() { 
      super(); 
     } 

     public Certificate(String name, List<CertificateField> certificateFields) { 
      super(); 
      this.name = name; 
      this.certificateFields = certificateFields; 
     } 

     public Long getId() { 
      return id; 
     } 
     public void setId(Long id) { 
      this.id = id; 
     } 
     public String getName() { 
      return name; 
     } 
     public void setName(String name) { 
      this.name = name; 
     } 

     public List<CertificateField> getCertificateFields() { 
      return certificateFields; 
     } 

     public void setCertificateFields(List<CertificateField> certificateFields) { 
      this.certificateFields = certificateFields; 
     } 

     @Override 
     public String toString() { 
      String res; 
      res="-------------------\n"; 
      res+="Certificate [id=" + id + ", name=" + name+"]\n"; 
      for(CertificateField item:certificateFields){ 
       res+=item.toString()+"\n"; 
      } 
      return res; 
     } 
    } 


@Entity 
@Table(name= "CERTIFICATE_FIELD") 
public class CertificateField implements IAvailableID{ 
    @Id 
    @Column(name= "ID") 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private Long id; 

    @Column(name= "NAME", nullable = false, length=50) 
    private String name;  

    @Column(name= "VALUE", nullable = false, length=50) 
    private String value; 

    @ManyToOne(targetEntity=Certificate.class, cascade = CascadeType.ALL,fetch = FetchType.LAZY) 
    @JoinColumn(name = "CERTIFICATE_ID", referencedColumnName="ID", nullable = false) 
    private Certificate certificate;  

    public CertificateField(){ 
     super(); 
    } 

    public CertificateField(String name, String value, Certificate certificate) { 
     super(); 
     this.name = name; 
     this.value = value; 
     this.certificate = certificate; 
    } 

    public Long getId() { 
     return id; 
    } 

    public void setId(Long id) { 
     this.id = id; 
    } 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public String getValue() { 
     return value; 
    } 

    public void setValue(String value) { 
     this.value = value; 
    } 


    public Certificate getCertificate() { 
     return certificate; 
    } 

    public void setCertificate(Certificate certificate) { 
     this.certificate = certificate; 
    } 

    @Override 
    public String toString() { 
     return "certificate field [id=" + getId() + ", name=" + getName()+ ", value=" + getValue()+"]"; 
    } 
}

來源

2017-06-01 Евгений Афанасьев

嘗試沒有「targetEntity」屬性？因爲任何像樣的JPA提供者都應該能夠通過泛型獲取相關類型 –

結果是一樣的。我已經嘗試過這個（（ –

在'persistence.xml'？ –