org.hibernate.AnnotationException：没有为实体指定标识符：com.ubosque.modelo.Ciudadano [英] org.hibernate.AnnotationException: No identifier specified for entity: com.ubosque.modelo.Ciudadano

问题描述

我得到这个错误：

  org.hibernate.AnnotationException：
没有为entity：com指定标识符。 ubosque.modelo.Ciudadano 
  

我的课程：

  @Entity 
 @Table（name =ciudadano）
 public class Ciudadano implements java.io.Serializable {
 
 
 private static final long serialVersionUID = 1L; 
 
 private int id; 
 private String nombre; 
私人字符串apellido; 
 @Column（name =fecha_nac）
私人日期fechaNac; 
 @Column（name =lugar_nac）
 private String lugarNac; 
 private String direccion; 
私人字符串telefono; 
 @Column（name =estado_civil）
 private String estadoCivil; 
私人字符串电子邮件; 
 @Column（name =desc_perfil_prof）
 private String descPerfilProf; 
 
 // setters& getters ... 
  

我知道这个错误是因为没有 @Id 注释，但如果我向id变量添加 @Id ，当我部署此错误时出现：

  javax.servlet.ServletException：
 javax.persistence.Table.indexes（）[Ljavax / persistence / Index; 
  

这个错误只会在我删除 @Id $ b

我的项目是由 Maven 3 和依赖关系创建的通过 pom 来进行donwloaded：



1. mysql-connector-java-5.0.8


2. hibernate-core-4.3.9.Final




解决方案

当你有一个 @Id 存在时，你有（关于Table.indexes）的异常（你必须拥有这个异常，所以真的看不到移除它的要点）显然有一个例外，你不张贴。由于您有一个支持JPA 2.0的JPA实现并且在CLASSPATH中有一个JPA2.1 jar，反之亦然，所以它很可能找不到该注释方法（这是JPA 2.1方法IIRC）。发布原因例外将澄清哪些，并应该指出你在正确的方向

I get this error:

org.hibernate.AnnotationException:
No identifier specified for entity: com.ubosque.modelo.Ciudadano

my class:

@Entity
@Table(name="ciudadano")
public class Ciudadano implements java.io.Serializable {


private static final long serialVersionUID = 1L;

private int id;
private String nombre;
private String apellido;
@Column(name="fecha_nac")
private Date fechaNac;
@Column(name="lugar_nac")
private String lugarNac;
private String direccion;
private String telefono;
@Column(name="estado_civil")
private String estadoCivil;
private String email;
@Column(name="desc_perfil_prof")
private String descPerfilProf;

// setters & getters ...

I know this error is because there is no @Id annotation, but if I add @Id to the id variable, when I deploy this error appears:

javax.servlet.ServletException:
javax.persistence.Table.indexes()[Ljavax/persistence/Index;

and this error ONLY disappears when I remove the @Id annotation, so any suggestions will be appreciated.

my project is made with Maven 3 and the dependencies donwloaded through pom are:

1. mysql-connector-java-5.0.8
2. hibernate-core-4.3.9.Final

解决方案

The exception that you have (about Table.indexes) when you have an @Id present (which you must have, so really don't see the point in removing it) clearly has a cause exception that you don't post. More than likely it cannot find that annotation method (which is a JPA 2.1 method IIRC) since you have either a JPA implementation supporting JPA 2.0 and have a JPA2.1 jar in the CLASSPATH or vice-versa. Posting the cause exception would clarify which, and should have pointed you in the right direction

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