Hibernate:如何使用注释指定自定义序列生成器类名?

问题描述

我想使用注释指定以下 hbm 配置:

I want to specify following hbm configuration using annotations:

<id name="somePK" column="&quot;somePK&quot;" type="long">
            <generator class="com.db.hibernate.KeyGenerator"/>
        </id>

我不知道如何用

@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="SEQ_STORE")

我是否必须在每个实体类中指定@javax.persistence.SequenceGenerator?
我可以在 @GeneratedValue 注释下只指定类名吗?

Do I have to specify @javax.persistence.SequenceGenerator in each entity class?
Can I specify just the class name under @GeneratedValue annotation?

推荐答案

请在下面找到我在项目中使用的相同代码集.

please find below set of code which i have used in project for the same.

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "XyzIdGenerator")
@GenericGenerator(name = "XyzIdGenerator",
        strategy = "com.mycompany.myapp.id.BigIntegerSequenceGenerator",
        parameters = {
            @Parameter(name = "sequence", value = "xyz_id_sequence")
        })
public BigInteger getId()
{
   return id;
}


package com.mycompany.myapp.id;

import org.hibernate.id.SequenceGenerator;
...

public class BigIntegerSequenceGenerator
    extends SequenceGenerator
{
    @Override
    public Serializable generate(SessionImplementor session, Object obj)
    {
        ...
    }
}

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