我有一個實體：@Entitypublic class MyEntity {  @Id  private String Id;  @NotNull  @Column(nullable = false)  private Integer size;  public void setSize(Integer size) { this.size = size; }  public Integer getSize() { return this.size; }  public void setId(String id) { this.id = id; }  public String getId() { return this.id; }}一個存儲庫：@Repositorypublic class MyEntityDAO {  @PersistenceContext  private EntityManager em;  public void create(MyEntity myEntity) {    em.persist(myEntity);  }}應(yīng)該拋出異常的測試：@RunWith(SpringRunner.class)@Transactional@SpringBootTestpublic class MyEntityDAOTest {  @Inject   private MyEntityDAO myEntityDAO;  @Test(expected = ConstraintViolationException.class)  public void nullSizeNotAllowedTest() {    MyEntity myEntity = new MyEntity();    myEntity.setSize(null);    myEntity.setId("entity_id");    myEntityDAO.create(myEntity);  }}但是測試失敗。實體不會拋出所需的異常。注釋適用于字符串，但不適用于整數(shù)。MyEntity 的自動生成表：FIELD   TYPE            NULL    KEY     DEFAULT  ID      VARCHAR(255)    NO      PRI     NULLSIZE    INTEGER(10)     NO              NULL