在JPA中保存具有一对一关系的实体

@Entity
public class Person {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    private String name;
    
    @OneToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "address_id", referencedColumnName = "id")
    private Address address;
    
    // 省略构造方法、getter和setter
}

@Entity
public class Address {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    
    private String city;
    
    private String street;
    
    // 省略构造方法、getter和setter
}

Person person = new Person();
person.setName("John");

Address address = new Address();
address.setCity("New York");
address.setStreet("123 Main St");

person.setAddress(address);

EntityManager entityManager = // 获取EntityManager的方式，这里省略
entityManager.getTransaction().begin();
entityManager.persist(person);
entityManager.getTransaction().commit();