Spring Data JPA -如何使用组合键插入子实体？

@Embeddable
public class CompositeKey implements Serializable {
    private Long key1;
    private Long key2;
    // getters and setters
}

@Entity
public class ChildEntity {
    @EmbeddedId
    private CompositeKey id;
    // other fields
    // getters and setters
}

ChildEntity childEntity = new ChildEntity();
CompositeKey compositeKey = new CompositeKey();
compositeKey.setKey1(1L);
compositeKey.setKey2(2L);
childEntity.setId(compositeKey);
// 设置其他字段的值
// 调用JPA的保存方法进行插入操作
childEntityRepository.save(childEntity);