JPA 错误：实体类没有指定主键

Question

我有一个实体类，jpa 抛出一个验证异常，说明指定了主键。我不知道为什么。

请查看以下详细信息： * 内部异常：javax.persistence.PersistenceException：异常 [EclipseLink-28018]（Eclipse 持久性服务 - 2.4.2.v20130514-5956486）：org.eclipse.persistence.exceptions.EntityManagerSetupException 异常描述：PersistenceUnit [默认] 的预部署失败。 内部异常：异常 [EclipseLink-7161] (Eclipse Persistence Services - 2.4.2.v20130514-5956486): org.eclipse.persistence.exceptions.ValidationException 异常描述：实体类 [class A] 没有指定主键。它应该定义@Id、@EmbeddedId 或@IdClass。如果您使用这些注释中的任何一个定义了 PK，请确保您的实体类层次结构中没有混合访问类型（已注释的字段和属性）。*

实体类A：

@Access(AccessType.FIELD)
@Entity
@Cache(disableHits=true)
@Table(name="VT_INVALID_USERS")
public class A extends BharosaBaseBean implements java.io.Serializable {
    @SequenceGenerator(name="USERS_SEQ", allocationSize=1)
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO, generator="USERS_SEQ")
    @Column(name="USER_ID")
    protected Long userId;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name="CREATE_TIME")
    protected Date createTime = new Date();

    public void setUserId( Long userId ) {
        this.userId = userId;
    }

    public Long getUserId( ) {
        return this.userId;
    }
}

BharosaBaseBean 类：

public abstract class BharosaBaseBean implements java.io.Serializable {
    abstract public Long getPKId();
}

我拥有的持久化文件：

<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 persistence_1_0.xsd" version="1.0">
    <persistence-unit name="default" transaction-type="RESOURCE_LOCAL">
        <provider>
            org.eclipse.persistence.jpa.PersistenceProvider
        </provider>
        <mapping-file>orm.xml</mapping-file>
        <properties>
            <property name="eclipselink.logging.level" value="FINE"/>
            <property name="javax.persistence.jdbc.driver" value="oracle.jdbc.driver.OracleDriver"/>
            <property name="javax.persistence.jdbc.url" value=" <url>"/>
            <property name="javax.persistence.jdbc.user" value="<user>"/>
            <property name="javax.persistence.jdbc.password" value="<pwd>"/>
            <property name="eclipselink.jdbc.read-connections.max" value="5"/>
            <property name="eclipselink.jdbc.read-connections.min" value="5"/>
            <property name="eclipselink.jdbc.write-connections.max" value="10"/>
            <property name="eclipselink.jdbc.wirte-connections.min" value="10"/>
            <property name="eclipselink.session.customizer" value="oracle.security.uas.core.common.toplink.SessionCustomizerForCLIRetryLogic"/>
            <property name="oaam.eclipselink.conn.health.validated.on.error" value="true"/>
            <property name="oaam.eclipselink.query.retry.attempt.count" value="3"/>
            <property name="oaam.eclipselink.delay.between.reconnect.attempts" value="5000"/>
            <property name="oaam.eclipselink.ping.sql" value="select 1 from dual"/>
        </properties>
    </persistence-unit>
</persistence>

Answer 1

也许您可以尝试将基类添加到 persistence.xml 文件中。