小编bra*_*leg的帖子

我无法弄清问题是什么,请帮忙.我搜索了很多,但没有找到任何有用的建议.也许你可以帮助我.非常感谢.

使用eclipselink作为jpa提供程序有两个类:

@Entity
@Table(name = "USER")
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.TABLE)
    private Long id;

    private String login;

    private Long groupId;

    private String email;

    @ManyToMany(mappedBy = "users")
    private List polls;

    @OneToMany(mappedBy = "user")
    private List votes;

    public List getVotes() {
        return votes;
    }

    public void setVotes(List votes) {
        this.votes = votes;
    }

    public User() {
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getLogin() {
        return login; …