javaJPA中的单向OneToMany关系

The Owner (The "many" side):
@Id
@Column(name="Id")
private Long id;

@Column(name = "ProductId", insertable = false, updatable = false)
private Long productId;
The "One" side:
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "ProductId", referencedColumnName = "Id", nullable = false)
private List things = new ArrayList<>();