我的实体类是：

@Entity
public class User implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(unique = true, nullable = false)
    private Long id;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "dt_creation", nullable = false)
    private Date dtCreation;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "dt_maj", nullable = false)
    private Date dtMaj;

    // bi-directional many-to-one 
    @OneToMany(mappedBy = "quality", cascade = CascadeType.ALL, orphanRemoval = true)
    private Set<RQulityUser> RQualityUser;

@Entity
public class RQualityUser implements Serializable {

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

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "dt_creation", nullable = false)
    private Date dtCreation;

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "dt_maj", nullable = false)
    private Date dtMaj;

    // bi-directional many-to-one association to Questionnaire
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "fk_user", updatable = false, nullable = false)
    private User user;

    // bi-directional many-to-one association to QualitePersonne
    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "cd_quality_user", updatable = false, nullable = false)
    private Quality quality;

当我得到一个用户并试图清除rqualityuser列表时，我不工作：

User user = em.getByid(11);
 user.getRQualityUserList().clear();

hibernate不删除关系表中的记录？