Java Hibernate@OneToMany映射出现异常，

你能帮我看看这有什么问题吗

@Entity
@Table(name = "vendor_po")
public class VendorPO {
    @Id
    @Column(name = "vendor_po_id")
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long vendor_po_id;

    @OneToMany(orphanRemoval = false, cascade = { CascadeType.DETACH, CascadeType.MERGE, 
    CascadeType.CascadeType.PERSIST, CascadeType.REFRESH })
    private List<PaymentMethods> payments = new ArrayList<PaymentMethods>();
}

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我的同事帮我解决了这个问题，因为他说在这种情况下应该使用manytoman映射

@ManyToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE })
    @JoinTable(name = "vendorpo_payment", joinColumns = @JoinColumn(name = "vendor_po_id"), inverseJoinColumns = @JoinColumn(name = "payment_id"))
    private List<PaymentMethods> payments = new ArrayList<PaymentMethods>(); 

@ManyToMany（cascade={CascadeType.PERSIST，CascadeType.MERGE}）
@JoinTable（name=“vendorpo\u payment”，joinColumns=@JoinColumn（name=“vendor\u po\u id”），inverseJoinColumns=@JoinColumn（name=“payment\u id”））
私有列表付款=新建ArrayList（）；

如有任何帮助，将不胜感激。如果问题不清楚，请询问详情。

@ManyToMany(cascade = { CascadeType.PERSIST, CascadeType.MERGE })
    @JoinTable(name = "vendorpo_payment", joinColumns = @JoinColumn(name = "vendor_po_id"), inverseJoinColumns = @JoinColumn(name = "payment_id"))
    private List<PaymentMethods> payments = new ArrayList<PaymentMethods>();