JPA 2：EclipseLink的Ant编译错误

我同时通过ANT构建脚本生成通用对我的模型得到这个错误：JPA 2：EclipseLink的Ant编译错误

Internal Exception: Exception [EclipseLink-7161] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.ValidationException 
Exception Description: Entity class [class com.ckd.model.BookModel] has no primary key specified. It should define either an @Id, @EmbeddedId or an @IdClass. If you have defined PK using any of these annotations then make sure that you do not have mixed access-type (both fields and properties annotated) in your entity class hierarchy.

这里是我的实体类：

@Entity 
@Table(name = "BOOK") 
public class BookModel implements Serializable 
{ 
    private static final long serialVersionUID = 1L; 

// @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    @Column(name = "ID", unique = true, nullable = false) 
    private Long id; 

    @Id 
    @NotNull 
    @Size(min = 32, max = 32) 
    @Column(name = "HASHID", unique = true, nullable = false) 
    private String hashid; 

    @NotNull 
    @Size(min = 1, max = 255) 
    @Column(name = "TITLE") 
    public String title; 

    @NotNull 
    @Size(min = 1, max = 255) 
    @Column(name = "AUTHOR") 
    private String author; 

    @Lob 
    @NotNull 
    @Column(name = "CONTENT") 
    private String content; 

    @Size(min = 2, max = 3) 
    @Column(name = "LANG") 
    public String lang; 

    // getters and setters here 
}

我还添加了这种到我的实体，但它没有区别：

@Entity 
@Access(AccessType.FIELD)

建立我的项目反对捆绑的EclipseLink库与G lassfish 3.1或使用来自http://www.eclipse.org/eclipselink/downloads/的EclipseLink v2.x.x独立库也没有区别 - 仍然有上述错误。根据Java EE项目要求，我的persistence.xml位于WebContent\META-INf目录下。它的内容是：

<?xml version="1.0" encoding="UTF-8"?> 
<persistence xmlns="http://java.sun.com/xml/ns/persistence" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" 
    version="2.0"> 
    <persistence-unit name="persistentUnit" transaction-type="JTA"> 
     <description>Persistent Unit for Entity Classes</description> 
     <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider> 
     <jta-data-source>jdbc/prod1</jta-data-source> 
     <class>com.ckd.model.BookModel</class> 
     <exclude-unlisted-classes>false</exclude-unlisted-classes> 
     <properties> 
      <property name="eclipselink.jdbc.DBDictionary" value="mysql(DriverVendor=mysql)" /> 
      <property name="eclipselink.target-database" value="org.eclipse.persistence.platform.database.MySQLPlatform" /> 
      <property name="eclipselink.jdbc.DBDictionary" value="searchStringEscape=\\" /> 
      <property name="eclipselink.jdbc.QuerySQLCache" value="false" /> 
      <property name="eclipselink.weaving" value="false" /> 
      <property name="eclipselink.logging.logger" value="org.eclipse.persistence.logging.DefaultSessionLog" /> 
      <property name="eclipselink.logging.level" value="FINEST" /> 
     </properties> 
    </persistence-unit> 
</persistence>

我该如何解决这个错误？这是EclipseLink 2.x.x当前实现中的错误吗？

来源

2011-04-24 ChuongPham

这是一个单独的，未使用的实体条目orm.xml导致上述错误。注释掉未使用的实体条目解决了上述错误。

来源

2011-04-24 13:05:45 ChuongPham

你必须取消注释@Id注释在类

private static final long serialVersionUID = 1L; 

// @Id <------ HERE 
@GeneratedValue(strategy = GenerationType.AUTO) 
@Column(name = "ID", unique = true, nullable = false) 
private Long id; 
......

来源

2011-09-12 16:21:24 maxtorzito

JPA 2：EclipseLink的Ant编译错误

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