eclipse链接重复键奇怪错误

Question

当我为第一个实体(customer1)创建数据时，数据创建成功了，但当我要为第二个实体创建数据时，Im会出现以下错误。我们在两个不同的包中生成这两个实体，它们的表注释名不同，所以我不明白为什么我会出现这个错误。我们还为每个实体创建不同的持久性单元名称...这个错误的原因是什么？

错误在提交中

entityManager.getTransaction().commit();
        entityManager.close();

异常[EclipseLink-4002]（Eclipse Persistence Services-2.3.2.V20111125-R10461):org.Eclipse.Persistence.exceptions.DatabaseException内部异常：java.sql.SQLINTegrityConstraintViolationException：语句被中止，因为它会导致在“Customer02”上定义的“SQL130407132754180”标识的唯一或主键约束或唯一索引中出现重复的键值。错误代码：20000调用：插入customer02(CUSTOMER、NOTE、BUYERID)值（？,？,？）bind=>[3个参数绑定]查询：InsertObjectQuery(Prod2.Customer02@7FE4BDCC)

包中的实体1客户...Customer01

package prod1;

import java.util.List;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="customer01")
public class Customer
{

  @Id
  @Column(name="customer_number")
  private String customer;
  private String Note;
  private String BuyerId;

包中的实体2客户...Customer02

package prod2;

import java.util.List;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="customer02")
public class Customer
{

  @Id
  @Column(name="customer_number")
  private String customer;
  private String Note;
  private String BuyerId;

持久性单元是

-<persistence-unit name="prod1">
<class>prod1.customer01</class>-
<properties><property name="eclipselink.ddl-generation" 
value="drop-and-create-tables"/>
<property name="eclipselink.logging.level" value="SEVERE"/>
</properties></persistence-unit>-

-<persistence-unit name="prod2">
<class>prod2.customer02</class>-
<properties><property name="eclipselink.ddl-generation" 
value="drop-and-create-tables"/>
<property name="eclipselink.logging.level" value="SEVERE"/>
</properties></persistence-unit>-

Answer 1

所示注释没有为ID定义顺序。尝试添加@GeneratedValue以让提供程序为您分配它们。

http://wiki.eclipse.org/eclipselink/examples/jpa/primarykey