@Embeddable
@Data
public class Audit{
    private String name;
    private Audit auditor;
    private LocalDateTime creationDate;
}

@Entity
@Table(name = "BANK")
public class Bank{
    @Id
    private Long id;
    
    @Column(name = "BANK_NAME")
    private String bankName;
    
    @Embedded
    private Audit audit;
}

@Entity
@Table(name = "CORPORATION")
public class Corporation{
    @Id
    private Long id;
    
    @Column(name = "CORPORATION_NAME")
    private String corporationName;
    
    @Embedded
    private Audit audit;
}

历史上，Hibernate 称这些组件为 "components"。而 JPA 则称其为 [embeddables](https://docs.jboss.org/hibernate/orm/5.4/userguide/html_single/Hibernate_User_Guide.html#embeddables)。不管怎样，概念是相同的：一种值的组合。
通常，可嵌入类型被用于**将多个基本类型映射**分组，并在多个实体之间**重用**。
Java 代码示例：
```java
@Data
@Entity(name = "Book")
public class Book {
    @Id
    @GeneratedValue
    private Long id;
    private String title;
    private String author;
    private Publisher publisher;
}
@Data
@Embeddable
public static class Publisher {
    @Column(name = "publisher_name")
    private String name;
    @Column(name = "publisher_country")
    private String country;
}

create table Book (
    id bigint not null,
    author varchar(255),
    publisher_country varchar(255),
    publisher_name varchar(255),
    title varchar(255),
    primary key (id)
)

<details>
<summary>英文:</summary>
Historically Hibernate called these components. JPA calls them [embeddables](https://docs.jboss.org/hibernate/orm/5.4/userguide/html_single/Hibernate_User_Guide.html#embeddables). Either way, the concept is the same: a composition of values.
Most often, embeddable types are used **to group** multiple basic type mappings **and reuse them** across several entities.
Java Code Example:
    @Data
    @Entity(name = &quot;Book&quot;)
    public class Book {
    
    	@Id
    	@GeneratedValue
    	private Long id;
    
    	private String title;
    
    	private String author;
    
    	private Publisher publisher;
    
    }
    
    @Data
    @Embeddable
    public static class Publisher {
    
        @Column(name = &quot;publisher_name&quot;)
    	private String name;
        @Column(name = &quot;publisher_country&quot;)
    	private String country;
    }
And this is SQL to show how your table should look like:
    create table Book (
        id bigint not null,
        author varchar(255),
        publisher_country varchar(255),
        publisher_name varchar(255),
        title varchar(255),
        primary key (id)
    )
More details can be found in the [documentation](https://docs.jboss.org/hibernate/orm/5.4/userguide/html_single/Hibernate_User_Guide.html#embeddables) :)
</details>