如何使用JPA将实体属性注入到另一组实体中？

// 源实体类
@Entity
public class SourceEntity {
    @Id
    private Long id;
    private String name;
    
    @OneToOne
    @JoinColumn(name = "target_id")
    private TargetEntity targetEntity;
    
    // 省略构造函数、getter和setter方法
}

// 目标实体类
@Entity
public class TargetEntity {
    @Id
    private Long id;
    private String description;
    
    // 省略构造函数、getter和setter方法
}

// 使用JPA保存实体
public class Main {
    public static void main(String[] args) {
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("your-persistence-unit");
        EntityManager em = emf.createEntityManager();
        
        em.getTransaction().begin();
        
        SourceEntity sourceEntity = new SourceEntity();
        sourceEntity.setId(1L);
        sourceEntity.setName("Source");
        
        TargetEntity targetEntity = new TargetEntity();
        targetEntity.setId(1L);
        targetEntity.setDescription("Target");
        
        sourceEntity.setTargetEntity(targetEntity);
        
        em.persist(sourceEntity);
        
        em.getTransaction().commit();
        
        em.close();
        emf.close();
    }
}